βdecay phenomenology of nuclear fission products
Abstract
Two data sets representing the two principal experimental techniques used to study the βdecay of shortlived fission fragments are analyzed. The average endpoint and electron energies for nuclei with similar Qvalues are the same within statistical accuracy in the two sets. However, the spread of the endpoints is considerably larger in the data set based on integral γenergies (ANR set) compared with the set based on standard γspectroscopy (ENDF set). The averaged βstrength function for the ANR set follows a "universal" trend, decreasing monotonically and rapidly with increasing βendpoint energy. On the other hand, the βstrength function in the ENDF set is less steep, and at higher excitation energy it is considerably smaller than in the ANR set. These differences imply a systematic bias in one of these two data sets.
 Publication:

Nuclear Physics A
 Pub Date:
 December 1983
 DOI:
 10.1016/03759474(83)903883
 Bibcode:
 1983NuPhA.411..199B