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Some applications of electronic measuring tehcniques to the study of nuclear magnetism at low temperatures : a study of spin-lattice relaxation in solid He³ at temperatures below 1⁰K with special attention to the effects of He⁴Giffard, R. P. January 1968 (has links)
No description available.
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Atom versus cluster reactivities for calcium and magnesiumWhetten, Alan Ray. January 1984 (has links)
Call number: LD2668 .T4 1984 W53 / Master of Science
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The spectra of solids at low temperaturesGehring, K. A. January 1966 (has links)
No description available.
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Thermal desorption, photodesorption, and photodissociation of water on amorphous ice and lunar surfacesDeSimone, Alice Johnson 13 January 2014 (has links)
The temperature-programmed desorption profiles of water from three lunar analogs were measured. These experiments showed that glassy materials were hydrophobic, that water on multiphase materials occupied a continuum of adsorption sites, and that feldspar exhibited significant chemisorption of water. The competition between photodissociation and photodesorption of amorphous solid water (ASW) was investigated on three substrates: copper with a thin oxide coating, an impact melt breccia from Apollo 16, and a mare basalt from Apollo 17. The rotational temperature of desorbing H₂O did not vary significantly with substrate, but the H₂O time-of-flight spectra were broader on the lunar slabs than on copper. Additionally, the cross sections for water removal at low coverages were higher on the lunar slabs than on copper. O(³PJ) produced by 157-nm irradiation of ASW on the same three substrates was measured as a function of spin-orbit state, H₂O exposure, and irradiation time. The same Maxwell-Boltzmann components were present in each case, with translational temperatures of 10,000 K, 1800 K, 400 K, and the surface temperature, but the relative intensities of these components differed widely between substrates. Evidence for diffusion out of pores in the ASW and in the lunar slabs was observed for H2O exposures of at least 1 Langmuir. Cross sections for H2O and O(3PJ) depletion due to 157-nm irradiation of ASW were applied to icy grains in the rings of Saturn, and corresponding cross sections on the lunar substrates were used to estimate the flux of water desorbing from the Moon and the density of oxygen atoms in the lunar atmosphere.
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