Search for the decay of 229mTh by photon detection
Search for the decay of 229mTh by photon detection
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通过光子探测寻找 229mTh 的衰变
DOI：
10.1524/ract.2005.93.9-10.511
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
A. Shinohara
中科院分区：
文献类型：
--
作者：
Y. Kasamatsu;H. Kikunaga;K. Takamiya;T. Mitsugashira;T. Nakanishi;Y. Ohkubo;T. Ohtsuki;W. Sato;A. Shinohara
摘要通过低噪声光电倍增管对通过阴离子交换法从母体核素233 U快速化学分离制备的样品进行光子探测，对229 mTh在3.5 eV处的同质异能跃迁进行了研究。在229 Th硝酸溶液样品中未观察到229 mTh衰变引起的光子发射。根据实验结果，讨论了~（229）mTh在HNO_3溶液中半衰期的极限。
Summary A search for the isomeric transition of 229mTh at 3.5 eV was made by photon detection with a low-noise photomultiplier for samples prepared by a rapid chemical separation from the parent nuclide 233U by means of an anion exchange method. The photon emission caused by the disintegration of 229mTh was not observed for 229Th nitric acid solution samples. From the experimental results, the limits of the half-life of 229mTh as dissolved in HNO3 solution are discussed.