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Internal partition function; diatomic molecules; phase-shift contribution

An analytical expression for the phase shift contribution to the internal partition function for the Morse potential is derived by using an approximate Jost function. This function is shown to be a convergent sum. The numerical results obtained for H₂ and HCl show the partition function to be a monotonically increasing function of temperature. This observation agrees with the results of Rogers and co-workers.

B Talukdar¹ M Chatterji¹ P Banerjee¹

1. Department of Physics, Visva-Bharati University, Santiniketan - 731 235

Published

July 1979

Manuscript received

14 November 1977

Manuscript revised

30 March 1979