検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

Multi-step cascades in $$^{63}$$Ni

$$^{63}$$Niにおける多段カスケード

大島 真澄; 金 政浩; 木村 敦   ; 古高 和禎  ; 藤 暢輔   ; 小泉 光生 

Oshima, Masumi; Kin, Tadahiro; Kimura, Atsushi; Furutaka, Kazuyoshi; Toh, Yosuke; Koizumi, Mitsuo

$$^{62}Ni(n,gamma)^{63}Ni$$反応からの多段$$gamma$$線カスケードを$$gamma$$線分光法で調べた。原子力機構研究用原子炉JRR-3における12台の大型ゲルマニウム検出器とBGO検出器からなる多重$$gamma$$線検出装置STELLAを使用して、多重$$gamma$$線のデータを取得した。中性子捕獲状態から基底状態への完全系のカスケード事象から、励起状態の準位構造を決定する新たな手法を開発した。その原理と有効性を$$^{63}$$Niの例で紹介する。

Multi-step cascades from the $$^{62}$$Ni(n$$_{cold}, gamma)^{63}Ni$$ reaction were studied via a $$gamma$$-ray spectroscopy method. A $$gamma$$-ray detector array comprising eight Eurisys clover detectors and BGO anti Compton shields has been constructed at the research reactor, JRR-3, in Japan Atomic Energy Agency, which is used to accumulate multiple $$gamma$$-ray coincident events. By selecting full cascade events from the capture state to the ground state, we have developed a new level construction method called Total Energy Leading nuclear Level Analysis in 1-dimensional spectrum (TELLA-1). Statistical pattern of multi-step cascades enables us to derive reliable decay scheme up to the capture state at 6,838 keV. In the presentation we will describe its principle and validity in the nuclear level assignment in $$^{63}Ni$$.

Access

:

- Accesses

InCites™

:

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.