SYMPOSIA PAPER Published: 01 January 2001
STP13627S

Fission Cross Section Measurements of Th-229 and Pa-231 Using Linac-Driven Lead Slowing-Down Spectrometer

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Making use of a back-to-back type double fission chamber and Kyoto University Lead slowing-down Spectrometer (KULS) driven by a 46 MeV electron linear accelerator (linac) at the Research Reactor Institute, Kyoto University (KURRI), the neutron-induced fission cross sections of Th-229 and Pa-231 have been measured relative to the 235U(n,f) reaction from ∼0.1 eV to 10 keV with energy resolution (FWHM) of about 40%. Each of the measured results has been compared with the evaluated data in ENDF/B-VI, JENDL-3.2 and JEF-2.2, whose data were broadened by the energy resolution of the KULS. The experimental data for the fission cross sections of Th-229 and Pa-231 have scarcely been obtained before in the relevant energy region.

Author Information

Kobayashi, K
Research Reactor Institute, Kyoto University, Osaka, Japan
Yamamoto, S
Research Reactor Institute, Kyoto University, Osaka, Japan
Kai, T
Japan Atomic Energy Research Institute, Ibaraki, Japan
Cho, HJ
Research Reactor Institute, Kyoto University, Osaka, Japan University of Ulsan, Korea
Yamana, H
Research Reactor Institute, Kyoto University, Osaka, Japan
Fujita, Y
Research Reactor Institute, Kyoto University, Osaka, Japan
Mitsugashira, T
The Oarai-branch, Institute for Material Research, Tohoku University, Ibaraki, Japan
Kimura, I
Institute of Nuclear Technology, Institute of Nuclear Safety System, Inc., Fukui, Japan
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Developed by Committee: E10
Pages: 439–446
DOI: 10.1520/STP13627S
ISBN-EB: 978-0-8031-5450-6
ISBN-13: 978-0-8031-2884-2