Laser Spectroscopic Investigation of the Element Fermium (Z = 100)
Laser Spectroscopic Investigation of the Element Fermium (Z = 100)
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DOI：
10.1007/s10751-005-9209-x
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发表时间：
2006-03
影响因子：
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通讯作者：
H. Backe;A. Dretzke;S. Fritzsche;R. Haire;P. Kunz;W. Lauth;M. Sewtz;N. Trautmann
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文献类型：
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作者：
H. Backe;A. Dretzke;S. Fritzsche;R. Haire;P. Kunz;W. Lauth;M. Sewtz;N. Trautmann
用共振电离光谱方法研究了Fe（Z= 100）的能级结构和超精细结构。实验是在美国橡树岭ORNL高通量核反应堆中产生的半衰期为20.1 h的同位素255 Fm的46 pg样品上进行的。从27，100到28，400 cm-1的波数扫描进行了搜索，以寻找具有大爱因斯坦系数的三个能级，正如ab initio Multi-Configuration-Dirac-Fock（MCDF）计算所预测的那样，并发现了五个新能级。此外，波数处的两个已知能级（25，099.8 ± 0.2）和（25，111.8 ± 0.2）cm− 1，激光带宽为1.5 GHz，观察到超精细增宽。
The level scheme and hyperfine structure of the element fermium (Z= 100) has been investigated with the method of resonance ionization spectroscopy in a buffer gas cell. The experiments were carried out on a 46 pg sample of the isotope255Fm with a half-life time of 20.1 h, produced in the high flux nuclear reactor of the ORNL, Oak Ridge, USA. A wave number scan from 27,100 to 28,400 cm−1was carried through to search for three levels with large Einstein-coefficients, as predicted byab initioMulti-Configuration-Dirac-Fock (MCDF) calculations, and five new levels were found. In addition, the two known levels at wave numbers (25,099.8 ± 0.2) and (25,111.8 ± 0.2) cm−1were studied with a laser band width of 1.5 GHz and hyperfine broadenings were observed.