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  • 1
    Electronic Resource
    Electronic Resource
    Optical activity induced by rotation of atomic spin (1992)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 14 (1992), S. 857-864 
    Details
    ISSN: 0392-6737
    Keywords: Other topics in the theory of the electronic structure of atoms and molecules (including properties other than the energy) ; Quantum theory ; quantum mechanics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary Physical systems or processes invariant under mirror reflection are not expected to exhibit intrinsically chiral asymmetries. Thus, it is ordinarily the case that unbounded and unexcited atoms (in the absence of weak nuclear interactions) should not manifest circular birefringence. It is shown, however, that in a rotating reference frame the coupling of atomic spin angular momentum to the angular velocity of the rest frame gives to optical activity even in the absence of contributions from nuclear interactions and the classical Coriolis force. Ground-state atomic hydrogen is predicted to be optically active in the microwave region near the hyperfine splitting frequency of 1420 MHz. Under appropriate circumstances, this spin-associated rotational circular birefringence can be some ten orders of magnitude larger than that previously estimated for virtual electronic transitions falling within the visible and UV portions of the spectrum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02456690
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  • 2
    Electronic Resource
    Electronic Resource
    The lifetime of the dimuon atom (1983)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 2 (1983), S. 848-852 
    Details
    ISSN: 0392-6737
    Keywords: Exotic atoms and molecules (containing mesons, muons other abnormal particles)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto Si analizza il decadimento debole di un muone nello stato fondamentale di un atomo dimuonico. Anche se i due muoni sono correlati dalla statistica di Fermi-Dirac, si mostra che, in netto contrasto con il caso apparentemente analogo del decadimento beta del neutrone in3H, la statistica non ha alcun effetto sul rapporto di decadimento muonico. Si discute la distinzione tra i due casi.
    Notes: Summary The weak decay of a muon in the ground state of a dimuon atom is analysed. Although the two muons are correlated by Fermi-Dirac statistics, it is shown that, in marked contrast to the seemingly analogous case of neutron beta-decay in3H, statistics have no effect on the muon decay rate. The distinction between the two cases is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02453223
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  • 3
    Electronic Resource
    Electronic Resource
    Intensity correlation as a means of manifesting coherent atomic excitation (1985)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 6 (1985), S. 283-290 
    Details
    ISSN: 0392-6737
    Keywords: Atomic photon processes ; Other topics in atomic spectra and interactions of atoms with photons
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Description / Table of Contents: Riassunto L'eccitazione di atomi in una coerente sovrapposizione lineare di stati non può essere sempre rivelata dalla misurazione dell'intensità di emissione spontanea. La correlazione dell'intensità nei due rivelatori, comunque, può in alcune circostanze specifiche rivelare questa eccitazione coerente.
    Notes: Summary The excitation of atoms into a coherent linear superposition of states may not always be revealed by measurement of the spontaneous-emission intensity at a single detector. Correlation of the intensity at two detectors, however, can under specified circumstances reveal this coherent excitation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02450688
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  • 4
    Electronic Resource
    Electronic Resource
    Morphological Variation in Ferrobacillus Ferrooxidans related to the Rate of Iron Oxidation (1961)
    [s.l.] : Nature Publishing Group
    Nature 191 (1961), S. 1221-1222 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Normal (Fig. \A), abnormal (Fig. IB) and reverted (Fig. ID) cells were collected as previously described1 and the rates at which they oxidized ferrous to ferric iron were determined by standard manometric techniques. Each Warburg vessel contained a total of 1-7 ml. liquid consisting of 500 \LM Fe++ ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1911221a0
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  • 5
    Electronic Resource
    Electronic Resource
    On Measurable Distinctions between Quantum Ensembles (1986)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 480 (1986), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1986.tb12433.x
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  • 6
    Electronic Resource
    Electronic Resource
    Two sides of wonder: Philosophical keys to the motivation of science learning (1989)
    Springer
    Synthese 〈Dordrecht〉 80 (1989), S. 43-61 
    Details
    ISSN: 1573-0964
    Source: Springer Online Journal Archives 1860-2000
    Topics: Natural Sciences in General , Philosophy
    Notes: Abstract Science education is most efficacious and enduring when undertaken within a philosophical framework akin to that of science, itself. This entails recognition that, above all, science is a mode of rational inquiry pursued by those who are curious about the natural world and motivated to seek rational answers to personally meaningful questions. The key to successful science instruction lies in fostering a student's self-motivation and productively channeling his innate curiosity. To do this a science educator must (a) convey to students an accurate and sympathetic impression of the importance of science to their cultural development; (b) help students develop an ability to evaluate information critically and arrive at logical conclusions; (c) provide students opportunities to engage in creative, personally meaningful scientific research.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00869947
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  • 7
    Electronic Resource
    Electronic Resource
    Gravitational modulation of particle clustering: A new class of gravitationally induced quantum interference (1988)
    Springer
    General relativity and gravitation 20 (1988), S. 247-259 
    Details
    ISSN: 1572-9532
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A gravitational potential difference between the two components of a split fermion or boson beam in a particle interferometer modulates the cross-correlation in particle fluctuations and the variance in difference counts of the two output beams received at two detectors. The gravitational potential difference also modulates the conditional probability that a fermion will be received at a single detector given that one has been registered at an earlier time. The proposed effects are particle analogues of the optical Hanbury Brown-Twiss experiments; they represent a new kind of intrinsically nonrelativistic gravitationally induced quantum interference different in concept and in observational procedure from that of the Colella-Werner-Overhauser experiment. The effects should be observable with field-emission electron beams and slow neutron beams.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00759184
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  • 8
    Electronic Resource
    Electronic Resource
    Rotational degeneracy breaking of atomic substates: A composite quantum system in a noninertial reference frame (1989)
    Springer
    General relativity and gravitation 21 (1989), S. 517-532 
    Details
    ISSN: 1572-9532
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The degenerate magnetic substates of a field-free atomic system are split in a rotating reference frame. The splitting and ordering of the states should be experimentally demonstrable by means of laser-induced quantum interference spectroscopy of hydrogenic Rydberg states. This would manifest dynamical consequences of a noninertial reference frame on theinternal structure of a composite quantum system-in contrast to the observed neutron Sagnac effect, which involves the relative phase of essentially point particles. The predicted level splitting is independent of constituent particle masses; a composite quantum system in a rotating reference frame exhibits effects inequivalent to those that would be engendered in an inertial frame by a gravitational field.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00904503
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  • 9
    Electronic Resource
    Electronic Resource
    Satellite test of intermediate-range deviation from Newton's law of gravity (1987)
    Springer
    General relativity and gravitation 19 (1987), S. 511-514 
    Details
    ISSN: 1572-9532
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A recent reanalysis of the original Eotvos experiment suggests the existence of a repulsive intermdiate-range deviation from Newtonian gravity with coupling strength on the order of ∼7.2×10−3 and a range on the order of 200 m. If such a force exists it would induce a test mass in the interior of a laboratory-scale spherical mass shell in the earth's orbit to undergo linear harmonic oscillation about the shell center. If the non-Newtonian force couples to baryon number, two such test masses of different composition would oscillate at different frequencies. The fractional change in oscillation frequency is more than one million times the fractional change in acceleration incurred by the same test masses in an Eötvös experiment at the earth's surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00760655
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  • 10
    Electronic Resource
    Electronic Resource
    Self-directed learning: Philosophy and implementation (1996)
    Springer
    Science & education 5 (1996), S. 357-380 
    Details
    ISSN: 1573-1901
    Source: Springer Online Journal Archives 1860-2000
    Topics: Natural Sciences in General
    Notes: Abstract An account is given of the instruction of university-level introductory physics courses according to an educational framework in which (1) curiosity-driven inquiry is recognised as an essential activity of both science and science teaching; (2) the principal role of the instructor is to provide students the incentive to learn science through their pursuit of personally meaningful questions; (3) the commission of errors is regarded as a natural concomitant to learning and is not penalised; (4) emphasis is placed on laboratory investigations that foster minimally restrictive free exploration rather than prescriptive adherence to formal procedure; (5) research skills are developed through out-of-class projects that involve literature search, experiment, and the modeling of real-world physical phenomena; (6) the precise and articulate use of language is regarded as seminal to communication in science (as it is in the humanities) and is promoted through activities that help develop written and verbal language skills; (7) the evaluation of student performance is based on a portfolio of accomplished work rather than on the outcome of formal testing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00625607
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