[2E10-16] ImPACT 1 (実験的研究)

[2E11] 核変換による高レベル放射性廃棄物の大幅な低減・資源化

(4-2) 代理反応を用いた⁷⁹79(n,g)⁸⁰Se反応断面積評価

*今井 伸明¹、堂園 昌伯¹、道正 新一郎¹、大津 秀暁²、中野 敬太³、下浦 享¹ (1. 東京大学原子核科学研究センター、2. 理化学研究所仁科加速器科学研究センター、3. 九州大学総理工)

キーワード：核データ、放射性ビームを用いた核反応、長寿命核廃棄物

Surrogate reactions of ^77,79Se(d,p) were measured in inverse kinematics to evaluate the neutron capture reaction on one of the long-lived fission products of ⁷⁹Se at OEDO beam line in RIBF. The gamma emission probability from the unbound highly excited states of ^78,80Se by using a new technique were measured model-indepently. The gamma emission probabilities with the theoretical compound nucleus formation cross section reproduces the cross section of ⁷⁷Se(n,g) which was directly measured. The neutron capture cross sections on ^77,79Se were evaluated experimentally for the first time, which are in good agreement with current compilation data. In this talk, the detailed experimental setup as well as the resultant cross sections will be given.