Observation of Nuclear Excitation by Electron Transition (NEET) in 197Au with a Nanosecond Stroboscopic Electron Spectrometer
Observation of Nuclear Excitation by Electron Transition (NEET) in 197Au with a Nanosecond Stroboscopic Electron Spectrometer
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用纳秒频闪电子能谱仪观察 197Au 中电子跃迁核激发 (NEET)
DOI：
10.1246/bcsj.68.566
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发表时间：
1995
影响因子：
4
通讯作者：
K. Ura
中科院分区：
文献类型：
--
作者：
A. Shinohara;T. Saito;K. Otozai;H. Fujioka;K. Ura
研究了 197Au 的电子跃迁核激发 (NEET)。预计 197Au 的 K 壳层电离原子的去激发将伴随着第一激发能级的核激发。使用专门设计的纳秒频闪电子能谱仪测量了 197Au 靶在 100 keV 脉冲电子束轰击后产生的 63 keV 电子的时间谱。从电子时间谱中提取出半衰期为 1.9 ns 的衰变成分。衰变归因于由于 NEET 过程而从激发的 197Au 原子核发射的内部转换电子，并且 NEET 概率被推导为 P = (5.1 ± 3.6) × 10−5。结果与几个理论估计进行了比较。
Nuclear excitation by electron transition (NEET) was investigated on 197Au. It is expected for 197Au that the deexcitation of the K-shell ionized atoms would be accompanied by the nuclear excitation of the first excited level. Time spectra of 63-keV electrons emerging from a 197Au target after bombardment with 100-keV pulsed electron beam were measured with a specially designed nanosecond stroboscopic electron spectrometer. A decay component with a half-life of 1.9 ns was extracted from the electron time spectrum. The decay was attributed to the internal conversion electrons emitted from the excited 197Au nucleus as a consequence of the NEET process and the NEET probability was deduced to be P = (5.1 ± 3.6) × 10−5. The result was compared with several theoretical estimates.