https://doi.org/10.1140/epja/s10050-024-01392-6
Special Article – New Tools and Techniques
Circular polarization measurement for individual gamma rays in capture reactions with intense pulsed neutrons
1
Japan Atomic Energy Agency, 2-4 Shirakata, 319-1195, Tokai, Ibaraki, Japan
2
Nagoya University, Furocho, Chikusa-ku, 464-8062, Nagoya, Aichi, Japan
3
Tokyo Institute of Technology, 2-12 Ookayama, 152-8511, Tokyo, Meguro-ku, Japan
4
High Energy Accelerator Research Organization (KEK), 1-1 Oho, 305-0801, Tsukuba, Ibaraki, Japan
5
Ibaraki University, 2-1-1 Bunkyo, 310-8512, Mito, Ibaraki, Japan
6
Osaka University, 10-1 Mihogaoka, 567-0047, Ibaraki, Osaka, Japan
7
National Institutes for Quantum Science and Technology, 8-1-7 Umemidai, 619-0215, Kizugawa, Kyoto, Japan
8
Institute for Molecular Science, Myodaiji, 444-8585, Okazaki, Aichi, Japan
9
Tohoku University, 2-1-1 Katahira, Aoba-ku, 980-8576, Sendai, Miyagi, Japan
10
Kyushu University, 744 Motooka, Nishi-ku, 819-0395, Fukuoka, Fukuoka, Japan
11
Institute of Advanced Energy, Kyoto University, Gokasho, 611-0011, Uji, Kyoto, Japan
Received:
2
April
2024
Accepted:
1
August
2024
Published online:
28
August
2024
Measurements of circular polarization of 
-ray emitted from neutron capture reactions provide valuable information for nuclear physics studies. The spin and parity of excited states can be determined by measuring the circular polarization from polarized neutron capture reactions. Furthermore, the -ray circular polarization in a neutron capture resonance is crucial for studying the enhancement effect of parity nonconservation in compound nuclei. The -ray circular polarization can be measured using a polarimeter based on magnetic Compton scattering. A polarimeter was constructed, and its performance indicators were evaluated using a circularly polarized -ray beam. Finally, as a demonstration, the -ray circular polarization was measured in 32S(
,)33S reactions with polarized neutrons.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
