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Krebs's Model for the Alkali Metals and the Screening Parameter
Author(s) -
Mahesh P. S.,
Dayal B.
Publication year - 1965
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.19650090206
Subject(s) - rubidium , caesium , alkali metal , lithium (medication) , sodium , chemistry , thermodynamics , potassium , value (mathematics) , constant (computer programming) , atomic physics , fermi gamma ray space telescope , physics , inorganic chemistry , condensed matter physics , mathematics , statistics , medicine , organic chemistry , computer science , programming language , endocrinology
The specific heats of sodium, potassium, rubidium, and caesium are calculated on the basis of Krebs's model (1). It is found that the theoretical θ− T curves agree with experiment if the screening parameter is taken as an adjustable constant. The deduced values of this parameter show a gradual change from the Bohm‐Pines to the Thomas‐Fermi form during the transition from sodium to caesium. The model, however, fails to give agreement in the case of lithium. Since the measured elastic constants of this metal do not give the correct value of θ 0 , the discrepancy for this case may be due to the errors in measurement.