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  • Other Sources  (185)
  • PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR  (129)
  • ASTRONOMY
  • EARTH RESOURCES AND REMOTE SENSING
  • 1970-1974  (185)
Collection
  • Other Sources  (185)
Source
Keywords
Years
Year
  • 1
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    Correlation effect and double electron ejection in the photoabsorption process (1971)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Electron-electron correlation effects in photoabsorption induced double electron ejection process, using many body perturbation theory
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: ; ADEMIE DES SCIENCES
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Microwave maps of the polar ice of the earth (1974)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Synoptic views of the entire polar regions of earth have been obtained free of the usual persistent cloud cover using a scanning microwave radiometer operating at a wavelength of 1.55 cm on board the Nimbus-5 satellite. Three different views at each pole are presented utilizing data obtained at approximately one-month intervals from December 1972 to February 1973. Large discrepancies exist between the long-term ice cover depicted in various atlases and the actual extent of the canopies. The distribution of multiyear ice in the north polar region is markedly different from that predicted by existing ice dynamics models. Irregularities in the edge of the Antarctic sea ice pack occur that have neither been observed previously nor anticipated. The brightness temperatures of the Greenland and Antarctic glaciers show interesting contours probably related to the ice and snow morphologic structure.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: American Meteorological Society; vol. 55
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Field adsorption of inert-gas atoms (1971)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Field adsorption of inert gas atoms at metal surface from variational calculation
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: ; - ASTRONOMY 1969- TE
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    NASA TECHNICAL REPORTS
  • 4
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    Generalized pseudopotential approach for electron-atom scattering. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: A generalized many-electron pseudopotential approach is presented for electron-neutral-atom scattering problems. A calculation based on this formulation is carried out for the singlet s-wave and p-wave electron-hydrogen phase shifts with excellent results. We compare the method with other approaches as well as discuss its applications for inelastic and rearrangement collision problems.
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: Physical Review Letters; 28; Apr. 24
    Format: text
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  • 5
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    Glauber-theory approach for molecular vibrational excitations (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Molecular vibrational excitations by charged-particle impact are investigated within the Glauber-theory approach. Theoretical results for electron-H2 scattering give good agreement with experimental data. We study the physical effects responsible for the structures in the differential cross section.
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: Physical Review Letters; 31; Oct. 29
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  • 6
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    Use of multiple basis sets in the Brueckner-Goldstone many-body perturbation theory for atomic problems. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: Physical Review A - General Physics; vol. 6
    Format: text
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  • 7
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    Stark broadening of high-principal-quantum-number n-alpha lines of hydrogen. (1973)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: High n-alpha lines (transitions n + 1 to n) with quantum numbers n between 50 and 250 have been observed emanating from galactic H II regions where the electron density and temperature are about 1000/cu cm and 1 eV, respectively. High n-alpha lines have not previously been seen in the laboratory where fairly homogeneous plasmas may be produced and relatively precise measurements of electron densities and temperatures can be made. The present work describes experiments where the first members of the hydrogen line series with lower states n = 10, 11, 12, and 13 have been detected in a laboratory plasma. The width of the 12-alpha line at 88.7 microns could be measured and was consistent with calculated broadening from elastic electron collisions and quasi-static ion effects.
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: Physical Review Letters; 30; May 14
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  • 8
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    Brueckner-Goldstone many-body perturbation calculation of helium photoionization. (1972)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: Physical Review A - General Physics; vol. 6
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  • 9
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    Human visual response to nuclear particle exposures (1972)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Experiments with accelerated helium ions were performed in an effort to localize the site of initial radiation interactions in the eye that lead to light flash observations by astronauts during spaceflight. The character and efficiency of helium ion induction of visual sensations depended on the state of dark adaptation of the retina; also, the same events were seen with different efficiencies and details when particle flux density changed. It was concluded that fast particles cause interactions in the retina, particularly in the receptor layer, and thus give rise to the sensations of light flashes, streaks, and supernovae.
    Keywords: PHYSICS, ATOMIC, MOLECULAR, AND NUCLEAR
    Type: NASA, Washington Proc. of the Natl. Symp. on Nat. and Manmade Radiation in Space; p 416-422
    Format: application/pdf
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  • 10
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    The effects of soil moisture and plant morphology on the radar backscatter from vegetation (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The results of experimental studies on the backscattering properties of corn, milo, soybeans and alfalfa are presented. The measurements were made during the summer of 1973 over the 8 to 18 GHz frequency band. The data indicate that soil moisture estimation is best accomplished at incidence angles near nadir with lower frequencies, while crop discrimination is best accomplished using two frequencies at incidence angles ranging from 30 deg to 65 deg. It is also shown that temporal plant morphology variations can cause extreme variations in the values of the scattering coefficients. These morphological changes can be caused by growth, heavy rain and in the case of alfalfa, harvesting.
    Keywords: EARTH RESOURCES AND REMOTE SENSING
    Type: NASA-CR-141684 , RSL-TR-177-51
    Format: application/pdf
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