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NQR; temperature dependence; internal motions

Temperature dependence of chlorine nuclear quadrupole resonance in 2-chloro 5-nitrobenzoic acid and 4-chloro 3-nitrobenzoic acid has been investigated in the region 77° K to room temperature. No phase transition has been observed. The results are analysed to obtain the torsional frequencies and their temperature dependence. A nonlinear temperature dependence is obtained for the torsional frequencies.

V S S Sastry¹ J Ramakrishna¹

1. Department of Physics, Indian Institute of Science, Bangalore - 560012

Published

September 1976

Manuscript received

5 March 1976

Manuscript revised

18 May 1976