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To explain t!>e well known anomaly in the specific heat of solid hydrogen below lOOK Schaferl } proposed a model in which each molecule is immersed in an axially symmetric field of the type -AP20(COS IJ),IJ being the angle betw.een the molecular axis and the crystalline hexagonal axis.It is interesting, therefore, to see how the newly developed method of nuclear resonance throws light· 1.0 (l.g 0.6 OH V'r <--0.2 0 {oK' fl Fig. 1. T em perature dependence of characteristic time .. c (The slope indicates the height of barrier. which hinders molecular rotation.)at University of

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