Neutron-induced fission cross section of 233Pa between 1.0 and 3.0 MeV.
The energy dependent neutron-induced fission cross section of 233Pa has for the first time been measured directly with monoenergetic neutrons. This nuclide is an important intermediary in a thorium based fuel cycle, and its fission cross section is a key parameter in the modeling of future advanced fuel and reactor concepts. A first experiment resulted in four cross section values between 1.0 and 3.0 MeV, establishing a fission threshold in excess of 1 MeV. Significant discrepancies were found with a previous indirect experimental determination and with model estimates.
Tovesson
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F
EC-JRC-Institute of Reference Materials and Measurements (IRMM), Retieseweg, B-2440 Geel, Belgium.
Hambsch
F J
FJ
Oberstedt
A
A
Fogelberg
B
B
Ramström
E
E
Oberstedt
S
S