The three-body nuclear interaction in K-40

Pandya, S. P. ; French, J. B. (1957) The three-body nuclear interaction in K-40 Annals of Physics, 2 (2). pp. 166-175. ISSN 0003-4916

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An estimate of the effective three-body nuclear interaction between the nucleons outside closed subshells in K40 is made by comparing the low-lying energy levels of Cl38 and K40. Use is made of the fact that, in jj coupling, and for an arbitrary two-body interaction, the d3/2±1f7/2 levels of one nucleus may be calculated from those of the other. After making a plausible calculation of the effects due to departures from the pure coupling scheme, we find a residual discrepancy between prediction and experiment which can be reasonably explained by invoking a repulsive three-body interaction. An argument, based on detailed features of the interconfiguration effects, suggests indeed that such a three-body interaction is required; if we assume this to be of short range, its magnitude is such that it contributes between 50 and 250 kev (for different J values) to the energy of the four outside nucleons in K40. These magnitudes should, at least, define a reasonable upper limit to the allowable three-body interaction.

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Deposited On:11 Apr 2011 10:29
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