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HK: Hadronen und Kerne
HK 51: Spectroscopy VIII, Fission
HK 51.7: Vortrag
Mittwoch, 18. März 1998, 15:30–15:45, E
Neutron induced fission of 239Pu in the resonance region — •L. Demattè, F.-J. Hambsch, and H. Bax — JRC-IRMM, Retieseweg, B-2440 Geel, Belgium
An investigation of the fission fragment mass and total kinetic energy
distributions of 239Pu for resolved resonances has been started. The
white neutron source at GELINA of the IRMM is used together with a double
Frisch-gridded ionization chamber for fission fragment detection.
239Pu is expected to exhibit a more pronounced dependence of the
fragment properties as a function of quantum numbers than 235U,
already studied some time ago [1]. A possible reason could be that for
resonance neutrons incident on 239Pu, fission occurs via J = 0+
and 1+-levels with mainly the K = 0+ and 1+ bands involved at the
saddle point. Thus effects related to the quantum numbers should be
detectable, because the energy difference of the two K-bands is about 1.25
MeV. The experimental setup and first results will be presented.
[1] F.-J. Hambsch, H.-H. Knitter, C. Budtz-Jørgensen and J.P. Theobald; Nucl. Phys. A491 (1989) 56