期刊
PHYSICAL REVIEW LETTERS
卷 94, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.94.212502
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The total scattering cross sections for slow neutrons with energies E in the range 300 neV to 3 meV for gaseous and liquid ortho-H-2(2) have been measured. The cross sections for H-2(2) gas are found to be in excellent agreement with both the Hamermesh and Schwinger and the Young and Koppel models. For liquid H-2(2), we confirm the existing experimental data in the cold neutron range and the discrepancy with the gas models. We find a clear 1/root E' dependence at low energies for both states. A simple explanation for the liquid H-2(2) cross section is offered.
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