Density dependence of the single-particle kinetic energy of solid hydrogen

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.41.96· OSTI ID:6910175

Herwig, K W; Gavilano, J L; Schmidt, M C; Simmons, R O ^[1]

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1. Materials Research Laboratory and Department of Physics University of Illinois at Urbana-Champaign, Urbana, Illinois 61801 (USA)

We have measured the inelastic neutron scattering from solid parahydrogen at molar volumes from 23.2 to 17.0 cm{sup 3}. We observe peaks in the differential cross section {ital d}{sup 2}{sigma}/d{Omega} dE corresponding to internal molecular transitions from ground to excited rotational and vibrational states. From the widths of these peaks we determine the center-of-mass translational energy per molecule using an underlying Gaussian momentum distribution for the initial center-of-mass translational wave function. For volumes of 23.2, 21.3, 19.5, 18.2, and 17.0 cm{sup 3}/mole we find kinetic energies per particle of 77{plus minus}3, 101{plus minus}8, 122{plus minus}14, 131{plus minus}14, and 146{plus minus}11 K, respectively.

• DOE Contract Number: AC02-76ER01198
• OSTI ID: 6910175
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 41:1; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
COHERENT SCATTERING
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
DIFFRACTION
ELEMENTS
ENERGY
ENERGY LEVELS
EXCITED STATES
HYDROGEN
INELASTIC SCATTERING
KINETIC ENERGY
MOMENTUM TRANSFER
NEUTRON DIFFRACTION
NONMETALS
ROTATIONAL STATES
SCATTERING
SOLIDS
VIBRATIONAL STATES