Internal inelastic scattering satellite probed by molecular-frame photoelectron angular distributions from CO2.
Internal inelastic scattering satellite probed by molecular-frame photoelectron angular distributions from CO2.
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通过 CO2 分子框架光电子角分布探测内部非弹性散射卫星。
DOI：
10.1103/physrevlett.101.023001
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发表时间：
2008
影响因子：
8.6
通讯作者：
K. Ueda
中科院分区：
文献类型：
--
作者：
X.J. Liu;H. Fukuzawa;T. Teranishi;A. De Fanis;M. Takahashi;H. Yoshida;A. Cassimi;A. Czasch;L. Schmidt;R. Dörner;I. Koyano;N. Saito;K. Ueda
用电子-离子多符合动量谱在C1s(2sigmag)-gt；4sigmau*形共振下测量了伴随CO2分子C1S光谱线的卫星的分子框架光电子角分布(MFPAD)。观测到的MFPAD表明，该共轭卫星是由内部非弹性散射激发的。在这个场景中，一个光电子沿着分子轴从C1S(2sigmag)轨道被抛出，并与最高占据的分子轨道1pg中的一个O孤对电子碰撞。然后，其中一个碰撞的电子被捕获到最低的空分子轨道2piu*，而另一个以sigmag对称性的卫星光电子的形式发射，丢失了原始光电子发射方向和宇称的信息。
The molecular-frame photoelectron angular distribution (MFPAD) of the satellite accompanying the C 1s photoline of the CO2 molecule has been measured at the C 1s(2sigmag)-->4sigmau* shape resonance, using electron-ion multicoincidence momentum spectroscopy. The observed MFPAD indicates that the conjugate satellite is excited by internal inelastic scattering. In this scenario, a photoelectron is ejected from the C 1s(2sigmag) orbital along the molecular axis and collides with an O lone-pair electron in the highest occupied molecular orbital 1pig. Then one of the colliding electrons is trapped to the lowest unoccupied molecular orbital 2piu*, while the other is emitted as a satellite photoelectron of sigmag symmetry, losing the information of the original photoelectron emission direction and parity.