Abstract
Time-differential angular correlations perturbed by the nuclear quadrupole interaction in a zinc single crystal were used to extract a value of for the ratio of Fermi to Gamow-Teller matrix elements in the allowed decay from the ground state to the , 197 keV state in . This leads to a figure of for the isospin-forbidden Fermi matrix element. Other parameters which can be derived from this number are for the admixture of the analog of the ground state in the excited state and keV for the effective charge-dependent matrix element. A value of μ was determined for the nuclear quadrupole interaction of the excited state in a zinc single crystal. The calibration provided by the pure Gamow-Teller decay to the 1.554 keV state in was used to remove effects of the implantation process, and data analysis was performed with a model which incorporated the effects of backscattered by the thick crystal.
RADIOACTIVITY ; measured () in Zn single crystal; deduced allowed decay matrix element, isospin mixing in level, and sign for level in Zn.
- Received 27 February 1978
DOI:https://doi.org/10.1103/PhysRevC.18.2333
©1978 American Physical Society