BETA–GAMMA ANGULAR CORRELATION IN ⁷⁴As

Abstract

The A2 coefficient of the beta–gamma angular correlation for the cascade 2−(β+)2+(γ)0+ in the positron decay of 74As to 74Ge has been measured as a function of energy. The values found are 0.015 ± 0.006 at W = 1.8, 0.019 ± 0.004 at W = 2.0, 0.030 ± 0.005 at W = 2.1, and 0.025 ± 0.005 at W = 2.2, where the energy W is measured in mc2 units. The data have been used to examine the structure of the first excited level in 74Ge, using the "modified Bij approximation". Four shell-model configurations, as well as a rotational excitation, have been found to fit the experimental data. The validity of the application of the "modified Bij approximation" to this decay is discussed.

Angular Distribution ofCu64Nuclei from theCu65(

“…On the other hand, the experimental results show that this is not the only possibility, but there must be interactions due to lower-rank tensors as well as the dominant one due to the highest-rank tensor. 4 …”

“…[3][4][5][6][7] The differential cross sections of a groups leading to the ground state or low-lying excited levels of the product were usually found to be in good agreement with distorted-wave (DW) calculations. On the other hand, the low-energy a particles, which populate the highly excited states of the product, were more characteristic of an evaporation process.…”