Abstract

The direct fission populations of states in 133,135Xe have been measured for fission induced by 14 MeV neutrons. Targets consisting of metal foils of 235U, 238U and 239Pu were separately encapsulated and irradiated for periods of 1 to 8 min in a flux of 1.5 × 10 11 n cm 2 · s . The xenon isotopes of interest were extracted from the bulk fission products within 3 to 12 min after irradiation. The xenon γ-rays were then examined with a Ge(Li) detector and the populations of the 133,135Xe isomer and ground states were deduced. Computer analysis techniques were employed to extract the independent fission yield values from this data.

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