Accurate electron affinity of Pb and isotope shifts of binding energies of Pb(.).
Accurate electron affinity of Pb and isotope shifts of binding energies of Pb(.).
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DOI：
10.1063/1.4961654
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发表时间：
2016-08
期刊：
影响因子：
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通讯作者：
Xiaolin Chen;C. Ning
中科院分区：
文献类型：
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作者：
Xiaolin Chen;C. Ning
铅 (Pb) 是 IVA 族的最后一种元素，在本研究之前，其电子亲和势精度较低，约为 10 meV。这是由于由于光源限制，通用阈值光脱离测量无法远低于 0.5 eV。在本工作中，同位素 m = 208 的 Pb 电子亲和势被确定为 2877.33(13) cm(-1) 或 0.356 743(16) eV。相对于以前的激光光脱离电子能谱，精度提高了 500 倍。此外，在 m = 206、207 和 208 时，观察到 Pb(-) 6p(3) (4)S3/2 - Pb 6p(2) (3)P2 的结合能发生显着的同位素变化。
Lead (Pb) was the last element of the group IVA whose electron affinity had a low accuracy around 10 meV before the present work. This was due to the generic threshold photodetachment measurement that cannot extent well below 0.5 eV due to the light source limitation. In the present work, the electron affinity of Pb was determined to be 2877.33(13) cm(-1) or 0.356 743(16) eV for the isotope m = 208. The accuracy was improved by a factor of 500 with respect to the previous laser photodetachment electron spectroscopy. Moreover, remarkable isotope shifts of the binding energy of Pb(-) 6p(3) (4)S3/2 - Pb 6p(2) (3)P2 were observed for m = 206, 207, and 208.