Direct Determination of Partial Wave Contributions in the σ * Shape Resonance of CO Molecules
Direct Determination of Partial Wave Contributions in the σ * Shape Resonance of CO Molecules
复制标题
直接测定 CO 分子 σ * 形状共振中的部分波贡献
DOI：
10.1103/physrevlett.80.1622
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发表时间：
1998
影响因子：
8.6
通讯作者：
N. Cherepkov
中科院分区：
文献类型：
--
作者：
E. Shigemasa;J. Adachi;K. Soejima;N. Watanabe;A. Yagishita;N. Cherepkov
通过检测与碎片离子一致的光电子，对 ${\ensuremath{\sigma}}^{*}$ 形状共振区域中 CO 分子的 C $K$-壳层进行了第一个完整的实验。从实验数据中提取了四种偶极子矩阵元素比率和四种相移差。他们的分析表明，在由于$l$混合而产生的${\ensuremath{\sigma}}^{*}$形状共振中，$d$和$f$分波对横截面做出了主要贡献，$f$和$g$波对$\ensuremath{\pi}$的相移快速增加做出了主要贡献。
The first complete experiment for the C $K$-shell of CO molecules in the region of the ${\ensuremath{\sigma}}^{*}$ shape resonance has been performed by detecting photoelectrons in coincidence with fragment ions. Four ratios of dipole matrix elements and four phase shift differences have been extracted from the experimental data. Their analyses show that, in the ${\ensuremath{\sigma}}^{*}$ shape resonance due to the $l$ mixing, $d$ and $f$ partial waves give the main contribution to the cross section, and $f$ and $g$ waves give the main contribution to a rapid increase of phase shift by $\ensuremath{\pi}$.