[2E09-11] Neutron capture reaction

[2E11] Measurements of neutron capture cross section of ³⁵Cl using NaI(Tl) spectrometer in ANNRI

*Kaoru Hara¹, Nobuya Fujii¹, Takashi Kamiyama¹, Yuki Narita¹, Hirotaka Sato¹, Tatsuya Katabuchi², Shoji Nakamura³, Yosuke Toh³ (1. Hokkaido Univ., 2. Tokyo Institute of Technology, 3. JAEA)

Keywords:Cl-35, Neutron capture cross section, Cl-36, NaI(Tl) spectrometer, ANNRI

A long-lived activation product ³⁶Cl (half-life 3×10⁵ yr) in low-level radioactive wastes is produced by the neutron capture reaction of a stable nucleus ³⁵Cl. For estimation of the production of ³⁶Cl, the measurements of neutron capture cross section of ³⁵Cl were performed in the neutron energy range from 0.02 eV to 1 keV using the NaI(Tl) spectrometer in ANNRI at J-PARC MLF. In the measurements, disc-shaped NaCl samples were used.