Abstract
Using triple-coincidence events of prompt fission gamma rays from 1995 Gammasphere data on spontaneous fission of ${}^{252}\mathrm{Cf},$ we made a careful analysis of the yield matrix of coincident pairs of barium $(Z=56)$ and molybdenum $(Z=42)$ fission fragments. Branching from gamma bands $(K=2)$ and octupole bands $(K=0)$ are presented for even-even partners, where observable. From this reanalysis the previously proposed ``extra-hot-fission mode'' (up to ten neutrons evaporated) as determined by twofold coincidences of 1993 Gammasphere data is much weaker, but not excluded. This finding is in agreement with a recently published similar study from the Legnaro gamma-detector array.
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