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Frequency distribution function of solid ammonia
Author(s) -
Goyal P. S.,
Dasannacharya B. A.,
Thaper C. L.,
Iyengar P. K.
Publication year - 1972
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220500232
Subject(s) - debye function , debye , anharmonicity , distribution function , debye model , specific heat , distribution (mathematics) , thermodynamics , function (biology) , chemistry , materials science , atomic physics , physics , condensed matter physics , debye length , plasma , nuclear physics , mathematical analysis , mathematics , evolutionary biology , biology
The frequency distribution function, g (ω), for solid ammonia has been derived from neutron inelastic scattering experiments at 106° K. It is used to calculate the specific heat and to analyse it in terms of Debye temperatures for translational and rotational parts. A comparison of the Debye temperatures with those obtained from the measured specific heat shows an excellent agreement up to 100°K, suggesting that the anharmonicity is not large below this temperature. Translational and rotational moments of the frequency distribution function calculated from the obtained g (ω) and the specific heat data are found to agree within about 10%.