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  • Articles  (35)
  • 07.65  (33)
  • Chemical Engineering
  • Electronic structure and strongly correlated systems
  • Saccharomyces cerevisiae
  • Springer  (35)
  • 1980-1984  (35)
  • Physics  (35)
  • 1
    Electronic Resource
    Electronic Resource
    On the possibility of highly selective detection of rare isotopic atoms by means of resonant laser light pressure (1984)
    Springer
    Applied physics 33 (1984), S. 247-251 
    Details
    ISSN: 1432-0649
    Keywords: 07.65 ; 32
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The application of laser deceleration and monochromatization of atoms in the schemes of single atom fluorescent detection is examined. The analysis performed shows that the use of resonant-light pressure in experiments with atomic beams enables one to obtain an ultimate value of detection selectivity that ranges from 1013 to 1016.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697336
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  • 2
    Electronic Resource
    Electronic Resource
    Biogenesis of mitochondria: Defective yeast H+-ATPase assembled in the absence of mitochondrial protein synthesis is membrane associated (1984)
    Springer
    Journal of bioenergetics and biomembranes 16 (1984), S. 561-581 
    Details
    ISSN: 1573-6881
    Keywords: H+-ATPase complex ; assembly defect ; Saccharomyces cerevisiae ; mitochondrial biogenesis ; membrane association
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Physics
    Notes: Abstract We have investigated the extent to which the assembly of the cytoplasmically synthesized subunits of the H+-ATPase can proceed in a mtDNA-less (rho°) strain of yeast, which is not capable of mitochondrial protein synthesis. Three of the membrane sector proteins of the yeast H+-ATPase are synthesized in the mitochondria, and it is important to determine whether the presence of these subunits is essential for the assembly of the imported subunits to the inner mitochondrial membrane. A monoclonal antibody against the cytoplasmically synthesized β-subunit of the H+-ATPase was used to immunoprecipitate the assembled subunits of the enzyme complex. Our results indicate that the imported subunits of the H+-ATPase can be assembled in this mutant, into a defective complex which could be shown to be associated with the mitochondrial membrane by the analysis of the Arrhenius kinetics of the mutant mitochondrial ATPase activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00743246
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  • 3
    Electronic Resource
    Electronic Resource
    Sensitive laser spectroscopy on trapped barium ions by quenching with hydrogen (1983)
    Springer
    Applied physics 30 (1983), S. 83-86 
    Details
    ISSN: 1432-0649
    Keywords: 07.65 ; 34 ; 32
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The sensitivity of laser spectroscopy on barium ions stored in a radio frequency quadrupole trap was drastically increased by using hydrogen for quenching the optically pumped metastable states. The attained fluorescence intensity per ion permits the detection of single ions. The method will be applied to environmental studies on actinides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688481
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  • 4
    Electronic Resource
    Electronic Resource
    Laser phase and frequency stabilization using an optical resonator (1983)
    Springer
    Applied physics 31 (1983), S. 97-105 
    Details
    ISSN: 1432-0649
    Keywords: 06 ; 07.60 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We describe a new and highly effective optical frequency discriminator and laser stabilization system based on signals reflected from a stable Fabry-Perot reference interferometer. High sensitivity for detection of resonance information is achieved by optical heterodyne detection with sidebands produced by rf phase modulation. Physical, optical, and electronic aspects of this discriminator/laser frequency stabilization system are considered in detail. We show that a high-speed domain exists in which the system responds to the phase (rather than frequency) change of the laser; thus with suitable design the servo loop bandwidth is not limited by the cavity response time. We report diagnostic experiments in which a dye laser and gas laser were independently locked to one stable cavity. Because of the precautions employed, the observed sub-100 Hz beat line width shows that the lasers were this stable. Applications of this system of laser stabilization include precision laser spectroscopy and interferometric gravity-wave detectors.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00702605
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  • 5
    Electronic Resource
    Electronic Resource
    Frequency modulation (FM) spectroscopy (1983)
    Springer
    Applied physics 32 (1983), S. 145-152 
    Details
    ISSN: 1432-0649
    Keywords: 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Frequency modulation (FM) spectroscopy is a new method of optical heterodyne spectroscopy capable of sensitive and rapid measurement of the absorption or dispersion associated with narrow spectral features. The absorption or dispersion is measured by detecting the heterodyne beat signal that occurs when the FM optical spectrum of the probe wave is distorted by the spectral feature of interest. A short historical perspective and survey of the FM spectroscopy work performed to date is presented. Expressions describing the nature of the beat signal are derived. Theoretical lineshapes for a variety of experimental conditions are given. A signal-to-noise analysis is carried out to determine the ultimate sensitivity limits.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688820
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  • 6
    Electronic Resource
    Electronic Resource
    Magnetic field effect measurements by time-selective absorption sampling (1983)
    Springer
    Applied physics 31 (1983), S. 15-17 
    Details
    ISSN: 1432-0649
    Keywords: 35 ; 07.65 ; 42.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An absorption method which permits time-selective measurements at different wavelengths has been developed in order to explore magnetic field effects on photoinduced electron transfer reactions in linked and unlinked donor-acceptor systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00693901
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  • 7
    Electronic Resource
    Electronic Resource
    Picosecond spectroscopy of intermolecular interactions in dye solutions (1983)
    Springer
    Applied physics 30 (1983), S. 99-104 
    Details
    ISSN: 1432-0649
    Keywords: 42.60 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Some new experimental data on the time development of ultrashort superfluorescence (SF) in the dye solution are presented. The correlation between temporal behaviour change and the change of the spectral and spatial intensity distribution gives direct evidence of the important role of the selffocusing phenomenon in the formation of the ultrashort SF pulse synchronized with the pumping one. The oriental relaxation of solvent molecules in the dye solution not only influences the duration of the dye SF via the selffocusing mechanism but also causes a temporal change of spontaneous emission spectrum. At least two different relaxation times were found in the fluorescence spectrum of the dye in several polar solutions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688484
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  • 8
    Electronic Resource
    Electronic Resource
    Polarization holography for measuring photoinduced optical anisotropy (1983)
    Springer
    Applied physics 32 (1983), S. 93-95 
    Details
    ISSN: 1432-0649
    Keywords: 07.65 ; 42.40 ; 82.50
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A new experimental method for measuring the optical anisotropy induced at photochemical reactions is proposed. The method is based on polarization holography and is a zero-background high sensitive technique. It is used to measure the molecular dichroism of fluorescein and the birefrigence induced at the additional photopolymerization of PMMA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688550
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  • 9
    Electronic Resource
    Electronic Resource
    Optimization of the optothermal detector for absorption spectroscopy in the low pressure range (1982)
    Springer
    Applied physics 27 (1982), S. 39-42 
    Details
    ISSN: 1432-0649
    Keywords: 07.65 ; 35
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract To use the sensitivity and the measurement accuracy of the optothermal detector (OT) better for linear absorption detection, a theory of the signal behaviour, worth for the most important range of application, is developed and compared with experimental data. By means of the example of CO2-laser light absorption by ammonia, containing two different nitrogen isotopes, the possibility of correcting measured values to get more exact information of the absorption behaviour is shown. The limits of error, as well as the reproducibility of the measurments could be kept in a range of about 1%.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697294
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  • 10
    Electronic Resource
    Electronic Resource
    An anomalous correlator of resonantly scattered light (1982)
    Springer
    Applied physics 27 (1982), S. 83-91 
    Details
    ISSN: 1432-0649
    Keywords: 42.65 ; 06 ; 35 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The space-time properties of the correlator of the light intensities scattered from resonant atoms are studied. It is shown that in measuring such a correlator by the method of optical shifts, an appreciable contribution appears from the anomalous correlator of the scattered field amplitudes. It is simple to observe this correlator in the field of a standing wave by measuring the correlation of oppositely scattered rays. The spectral and polarization properties of such a correlator are studied. Its investigation is of interest for high-resolution spectroscopy because it allows information to be obtained on the natural width of a line in conditions of strong Doppler broadening. It is important to stress that this is possible in a linear approximation with respect to the strength of the external field in contrast to the methods of laser spectroscopy based on nonlinear effects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697554
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  • 11
    Electronic Resource
    Electronic Resource
    Picosecond pulses and applications (1982)
    Springer
    Applied physics 28 (1982), S. 172-179 
    Details
    ISSN: 1432-0649
    Keywords: 42.60 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697843
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  • 12
    Electronic Resource
    Electronic Resource
    Photoionization and fragmentation of alkali metal clusters in supersonic molecular beams (1982)
    Springer
    Applied physics 29 (1982), S. 55-61 
    Details
    ISSN: 1432-0649
    Keywords: 36 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A supersonic molecular beam, pulsed laser and time-of-flight mass spectrometer are arranged together in order to study photo- and auto-ionization, two-photon-ionization and fragmentation processes of alkali clusters as a function of the laser wavelength. In spite of an unfavourable duty cycle, however, the apparatus reaches a considerably higher sensitivity than cw experiments. Alkali clustersM n (n≲21) have been observed and investigated. The well resolved TOF mass spectra are commonly accompanied by significant and broad signals of metastable ions, a phenomenon which cannot be observed by quadrupole mass spectrometry. ParticlesM n (n≲4) have been investigated by twophoton ionization using two different laser wavelengths. Several new electronic transitions for Na3 are found; commonly, however, the excitation and ionization channels are accompanied by strong fragmentation processes. The fragment patterns are very sensitively dependent upon the laser wavelength even when working near the ionization threshold. The results are a strong indication, that the peak intensities of cluster mass spectra cannot easily be related to the intensity distribution of the neutral cluster beam.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694369
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  • 13
    Electronic Resource
    Electronic Resource
    Trapping of ions from high energy sources into a radiofrequency ion trap (1982)
    Springer
    Applied physics 29 (1982), S. 89-92 
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    ISSN: 1432-0649
    Keywords: 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract An attempt is described to confine ions, created externally and accelerated to some energy, in an rf quadrupole trap. 4 keV Ba+ ions were stopped on a Ni foil, placed in an aperture of one trap electrode. The Ba then was evaporated from the heated foil and ionized by electron impact. At background pressure of about 10−5 mbar of various light buffer gases (He, H2, N2), the trap was filled once with 105 ions, at a minimum primary ion number of 1010. The storage time was 10 min. From the data obtained the possibility of spectroseopic experiments on rare isotopes, created with accelerators or nuclear reactors, is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692768
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  • 14
    Electronic Resource
    Electronic Resource
    Laser spectroscopy (1982)
    Springer
    Applied physics 28 (1982), S. 190-197 
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    ISSN: 1432-0649
    Keywords: 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697845
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  • 15
    Electronic Resource
    Electronic Resource
    Nonlinear spectroscopy (1982)
    Springer
    Applied physics 28 (1982), S. 81-91 
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    ISSN: 1432-0649
    Keywords: 42.65 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00697833
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  • 16
    Electronic Resource
    Electronic Resource
    Sub-Doppler excited molecule energy transfer spectroscopy (1982)
    Springer
    Applied physics 27 (1982), S. 153-156 
    Details
    ISSN: 1432-0649
    Keywords: 33 ; 42.80 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A sub-Doppler spectroscopic technique involving the detection of vibrational energy transfer in excited molecules with selected velocity components at a microphone diaphragm is demonstrated. The technique is applied to the investigation of thev 3 R(16) transition in HCN and the results compared with a previously derived theoretical model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694641
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  • 17
    Electronic Resource
    Electronic Resource
    Generation, stabilization, and amplification of subpicosecond pulses (1982)
    Springer
    Applied physics 28 (1982), S. 319-326 
    Details
    ISSN: 1432-0649
    Keywords: 07.60 ; 07.65 ; 42.60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A sync-pumped cw dye laser system has been used to produce subpicosecond pulses. Pulses as short as 0.7 ps, assuming a single-sided exponential pulse shape, were observed. A set of experiments was performed to investigate the origin and effects of noise in the sync-pumped system. A digital and an analog feedback loop have been designed to optimize the pulse width. The noise has been lowered by 10 dB for frequencies up to 10 kHz; long-term drift is also controlled by this method. A four-stage dye laser amplifier, pumped by a Nd:YAG laser which operates at a 10-Hz repetition rate, is synchronized electronically to the dye-laser picosecond pulses. A gain of 3×106 has been achieved.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00686361
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  • 18
    Electronic Resource
    Electronic Resource
    Harmonic detection with tunable diode lasers —two-tone modulation (1982)
    Springer
    Applied physics 29 (1982), S. 279-285 
    Details
    ISSN: 1432-0649
    Keywords: 07.65 ; 42.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The minimum absorption detectable by a tunable diode laser spectrometer utilising harmonic techniques is often limited by interference fringes generated by scattered light. The sensitivity of the spectrometer to absorption can be increased by applying a jitter modulation. In this paper, the theory of harmonic response for single- and two-tone modulation over optical fringes and Lorentzian absorption lines is developed and compared to experimental measurements. A simple analytic expression for the two-tone harmonic line shape is derived. This expression provides a physical understanding of the effects of the second modulation, and a means to unravel the effects of the second modulation on the linewidth and line shape. For a specific choice of the jitter frequency and phase, it is possible to simultaneously minimise the fringe signal and increase the harmonic absorption signal. The results of this investigation are applicable to trace gas detection using tunable diode lasers, and to other areas of spectroscopy and magnetic resonance where harmonic techniques are used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00689188
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  • 19
    Electronic Resource
    Electronic Resource
    New results on vibrational population decay in simple liquids (1982)
    Springer
    Applied physics 29 (1982), S. 213-218 
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    ISSN: 1432-0649
    Keywords: 34 ; 35 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The population lifetimes of the symmetric CH2-stretching mode of several methylene halides were measured after infrared excitation by spontaneous anti-Stokes Raman scattering of delayed picosecond probe pulses. Data ranging from 6.5 to 45 ps are reported. The results give evidence for vibrational energy transfer via anharmonic coupling to neighbouring vibrational combination bands and overtones.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00688670
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  • 20
    Electronic Resource
    Electronic Resource
    The reconstitution of oxidative phosphorylation in mitochondria isolated from a ubiquinone-deficient mutant ofSaccharomyces cerevisiae (1982)
    Springer
    Journal of bioenergetics and biomembranes 14 (1982), S. 159-169 
    Details
    ISSN: 1573-6881
    Keywords: Respiratory chain ; ATP synthesis ; mitochondria ; ubiquinone ; Saccharomyces cerevisiae ; cytochrome oxidase
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Physics
    Notes: Abstract Mitochondria, isolated from the ubiquinone-deficient nuclear mutant ofSaccharomyces cerevisiae E3-24, are practically unable to oxidize exogenous substrates. Respiratory activity, coupled to ATP synthesis, can, however, be reconstituted by the simple addition of ethanolic solutions of ubiquinones. A minimal length of the isoprenoid side chain (≥3) was required for the restoration. Saturation of the reconstitution required a large amount of exogeneous ubiquinone, in excess over the normal content present in the mitochondria of the wild type strain. A similar pattern of reconstituted activities could be also obtained using sonicated inverted particles. Mitochondria and sonicated particles are also able to carry out a dye-mediated electron flow coupled to ATP synthesis in the absence of added ubiquinone, using ascorbate or succinate as electron donor. This demonstrates that the energy conserving mechanism at the third coupling site of the respiratory chain is fully independent of the presence of the large mobile pool of ubiquinone in the membrane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00745017
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  • 21
    Electronic Resource
    Electronic Resource
    Second-harmonic detection with tunable diode lasers — Comparison of experiment and theory (1981)
    Springer
    Applied physics 26 (1981), S. 203-210 
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    ISSN: 1432-0649
    Keywords: 07.65 ; 42.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A series of experiments are carried out by current modulating a tunable diode laser, and slowly ramping the wavelength to scan weak absorption lines in gases at pressures ranging from 2 to 60 Torr. A lock-in amplifier detects the second harmonic (2f) of the modulation frequency, and the experimental 2f signals are compared with theory. Detailed measurements are made on Lorentzian, Voigt, and Gaussian line profiles, over a wide range of modulation amplitudes. Excellent agreement between experiment and calculation is obtained in all cases. This quantitative understanding enables one to derive true lineshapes and linewidths of very weak absorption lines from measurements of 2f lineshapes only. Results are applicable to trace gas detection using tunable diode lasers, and to other areas of spectroscopy and magnetic resonance where harmonic detection techniques are routinely employed to monitor weak signals.
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    URL: http://dx.doi.org/10.1007/BF00692448
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  • 22
    Electronic Resource
    Electronic Resource
    Observation of Ramsey resonance absorption in three separated laser fields produced by a corner reflector (1981)
    Springer
    Applied physics 24 (1981), S. 11-12 
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    ISSN: 1432-0630
    Keywords: 42.65 ; 07.65 ; 33.90
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Experimental observation of optical Ramsey interference in saturated absorption of methane in a low-pressure gas cell with three spacially separated laser beams at 3.39 μm is reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00900389
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  • 23
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    Microwave verification of a numerical optimization of fourier gratings (1981)
    Springer
    Applied physics 24 (1981), S. 147-150 
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    ISSN: 1432-0630
    Keywords: 07.65 ; 42.10
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A recent holographic technique makes it possible to manufacture a new kind of grating, the “Fourier grating”, whose profile is given by a superposition of a fundamental and a finite number of harmonics. A local theoretical optimization shows that this type of grating can have an efficiency better, than that of the echelette, for a broad wavelength range. In this paper, we show the validity of this theoretical prediction by an experimental verification in the microwave region.
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    URL: http://dx.doi.org/10.1007/BF00902272
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  • 24
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    Frequency dependence of resonant photoacoustic cells: The extended Helmholtz resonator (1981)
    Springer
    Applied physics 25 (1981), S. 221-229 
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    ISSN: 1432-0630
    Keywords: 07.65 ; 43.85
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Photoacoustic cells consisting of two chambers connected by a long narrow tube were studied at room temperature. Amplitude and phase angle of the PA signal were measured as a function of chopping frequency, tube length and buffer gas. Multipleresonance spectra were observed which can be interpreted quantitatively by a modified model of the acoustic Helmholtz resonator. The theoretical description is based on the analogy to the electrical transmission line theory.
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    URL: http://dx.doi.org/10.1007/BF00902975
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  • 25
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    Sub-doppler optothermal spectroscopy (1980)
    Springer
    Applied physics 23 (1980), S. 407-409 
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    ISSN: 1432-0630
    Keywords: 07.65 ; 82.50
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We report about possibilities of application of the optothermal detector (OT) for sub-Doppler spectroscopy experiments. Investigating transitions of SF6 in the 10 μm region we demonstrate two variants of obtaining high-frequency resolution-using a standing or a travelling wave.
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    URL: http://dx.doi.org/10.1007/BF00903224
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  • 26
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    High-power tunable IR Raman and optically pumped molecular lasers for spectroscopy (1980)
    Springer
    Applied physics 21 (1980), S. 173-180 
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    ISSN: 1432-0630
    Keywords: 42.65 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Recent developments of tunable IR compressed-H2 and liquid-N2 Raman Lasers as well as resonantly pumped NH3 lasers are reviewed. Emphasis is placed on research carried out at the Quantum Radiophysics Laboratory of the Lebedev Physical Institute in Moscow.
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    URL: http://dx.doi.org/10.1007/BF00900681
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  • 27
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    Application of pressure-tuned diode lasers to high-resolution spectroscopy (1980)
    Springer
    Applied physics 22 (1980), S. 241-243 
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    ISSN: 1432-0630
    Keywords: 07.65 ; 42.55 ; 42.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The application of the high-pressure chamber with a pressure transmitting medium (liquid at room temperature) to diode-laser tuning was found to be a useful method for high-resolution spectroscopy. Ammonia absorbtion spectra in the 10 μm region were recorded with a resolution approaching the Doppler limit.
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    URL: http://dx.doi.org/10.1007/BF00886014
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  • 28
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    Multi-photoelectron fluorescence selective detection of single atoms by laser radiation (1980)
    Springer
    Applied physics 22 (1980), S. 245-250 
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    ISSN: 1432-0630
    Keywords: 07.65 ; 32
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The results of fluorescence detection of single Na atoms in atomic beams have been presented. It has been shown that, in recording single atoms via the fluorescence signal from the photoelectron of thek〉1 atom, it is possible to achieve extremely high selectivity (S≃1020) of detection of these atoms against a great number of other atoms. The probability of recording the atom is slightly decreased.
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    URL: http://dx.doi.org/10.1007/BF00886015
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  • 29
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    Signal preprocessing for digital correlators (1980)
    Springer
    Applied physics 22 (1980), S. 251-256 
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    ISSN: 1432-0630
    Keywords: 06.50 ; 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The input format of fast digital correlators, such as used in photon correlation or recurrence rate correlation, is often exceeded by input signals, if high count rates coincide with sample times of the order of several hundred nanoseconds or more. Clipping, random clipping, and scaling are well known methods to reduce such signals appropriately. We discuss these procedures with special attention to noise performance possible errors introduced into the correlogram. Generalizations from single to multi-bit correlators are presented with a thorough discussion of random preset scaling, a new process suitable for multi-bit correlation of signals with arbitrary statistics. Furthermore we describe a new additional preprocessor which offers significant decrease of quantization noise, if constant background contributions are present in the signal. Though demonstrated on optical measurements, the methods treated in this paper generally apply, whenever the format of digital data has to be reduced prior to correlation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00886016
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  • 30
    Electronic Resource
    Electronic Resource
    Time averaging by means of a computer controlled dye-laser spectrometer (1980)
    Springer
    Applied physics 22 (1980), S. 361-364 
    Details
    ISSN: 1432-0630
    Keywords: 07.65 ; 42.80 ; 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract The noise characteristic of available laser sources limits the sensitivity of saturated absorption spectroscopy. Time averaging is one method to improve the signal-to-noise ratio. A computer controlled dye-laser spectrometer is described which has the capability to scan several times any selected frequency range with an absolute accuracy of ±200 kHz. The sensitivity of this system is demonstrated by measuring the isotope shift of the low abundant38Ar and by detecting a weak83Kr-hyperfine component.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00901057
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  • 31
    Electronic Resource
    Electronic Resource
    Infrared laser stark spectroscopy of ammonia (1980)
    Springer
    Applied physics 21 (1980), S. 181-189 
    Details
    ISSN: 1432-0630
    Keywords: 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Refined values for molecular constants of14NH3 and less precise values for those of15NH3 and14NH2D were obtained with laser Stark spectroscopy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00900682
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  • 32
    Electronic Resource
    Electronic Resource
    Theory of optical ramsey resonance in three separated fields produced by a corner reflector (1980)
    Springer
    Applied physics 22 (1980), S. 1-9 
    Details
    ISSN: 1432-0630
    Keywords: 42.65 ; 07.65 ; 33.90
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract In this paper we study the optical Ramsey resonance signal of two-level molecules in three separated fields consisting of one standing wave and two traveling waves of opposite directions with each other. Their separations and phase differences are given by a corner reflector. The transition probability of a molecule that traverses the three interaction regions is calculated by using an optical Bloch vector formalism. It is then integrated over distributions of molecular velocities and positions to evaluate the signal observed with a gas cell. The result is applied to compute the optical Ramsey resonance signal in the absorption line of CH4 at 3.39 μm. Variations of the Ramsey resonance lineshape and the intensity with the gas pressure and the field intensity are obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00897924
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  • 33
    Electronic Resource
    Electronic Resource
    Backward echo and FID in two-level systems (1980)
    Springer
    Applied physics 22 (1980), S. 433-437 
    Details
    ISSN: 1432-0630
    Keywords: 07.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Generation of backward photon echoes and proposed backward optical free induction decays is discussed in detail. Separation of the signals from excitation pulses by propagation and polarization directions suggests a new field of picosecond experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00901070
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  • 34
    Electronic Resource
    Electronic Resource
    Brewster window and windowless resonant spectrophones for intracavity operation (1980)
    Springer
    Applied physics 23 (1980), S. 319-326 
    Details
    ISSN: 1432-0630
    Keywords: 06 ; 07.65 ; 42.80
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract We report a new design for an acoustically resonant spectrophone well suited for intracavity operation with widely tunable lasers. Operation with Brewster angle windows or in a windowless mode is possible, and high quality factors (560 and 509, respectively) are achieved. Windowless operation permits continuous monitoring of ambient air. We discuss factors limiting the sensitivity, ∼10−7 cm−1, and present a double chopping scheme capable of significantly reducing the acoustical background encountered in windowless operation. The sensitivity of the spectrophone's performance to misalignment is also examined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00914918
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  • 35
    Electronic Resource
    Electronic Resource
    Studies of molecular relaxation by infrared and microwave coherent transients (1980)
    Springer
    Applied physics 21 (1980), S. 29-34 
    Details
    ISSN: 1432-0630
    Keywords: 07.65 ; 34
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract Novel techniques to observe coherent transients are successfully demonstrated on microwave transitions of NH3, H2O, OCS, and O2. The relaxation rate constants in thev 2 excited state of NH3 are obtained by infrared experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00886480
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