Search for α-decay of 229mTh produced from 229Ac β-decay following 232Th(γ, p2n) reaction
Search for α-decay of 229mTh produced from 229Ac β-decay following 232Th(γ, p2n) reaction
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搜索 232Th(γ, p2n) 反应后 229Ac β 衰变产生的 229mTh 的 α 衰变
DOI：
10.1524/ract.2005.93.9-10.507
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
T. Nakanishi
中科院分区：
文献类型：
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作者：
H. Kikunaga;Y. Kasamatsu;K. Takamiya;T. Mitsugashira;M. Hara;T. Ohtsuki;H. Yuki;A. Shinohara;S. Shibata;N. Kinoshita;A. Yokoyama;T. Nakanishi
我们在核反应232Th（γ，p2n）229Ac中产生了229Th，随后衰变为229m，gTh。寻找229mTh α衰变。在从232Th + γ反应产物中高度纯化的锕源的β衰变产物的分离钍样品中观察到能量在4.93 MeV和5.05 MeV之间的α粒子事件。α粒子的能量与229mTh的预期能量一致。
Summary We produced 229Th in the nuclear reaction 232Th(γ, p2n) 229Ac, followed by disintegration to 229m,gTh. The 229mTh α-decay was searched for. Alpha-particle events of energy between 4.93 MeV and 5.05 MeV were observed in the separated thorium sample of β-decay products from an actinium source highly purified from the 232Th + γ reaction products. The energies of the α-particles coincide with those expected for 229mTh.