论文信息 - Double beta decay nuclear matrix element of 48Ca

Double beta decay nuclear matrix element of 48Ca

Abstract The 2 v mode double beta decay of 48 Ca is studied in detail, particularly in connection with validity of the closure approximation. In an extensive shell-model calculation, nuclear matrix elements for low-lying and high-lying intermediate states have opposite signs. It is therefore indicated that a very small value has to be adopted for the average excitation energy, if one utilizes the closure approximation.

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