Breakdown of the two-step model in K-shell photoemission and subsequent decay probed by the molecular-frame photoelectron angular distributions of CO2.
Breakdown of the two-step model in K-shell photoemission and subsequent decay probed by the molecular-frame photoelectron angular distributions of CO2.
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通过 CO2 的分子框架光电子角分布探测 K 壳层光发射和随后的衰变中两步模型的分解。
DOI：
10.1103/physrevlett.101.083001
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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;K. Wang;B. Zimmermann;V. McKoy;I. Koyano;N. Saito;K. Ueda
我们报告了 CO2 的 C 1s 光发射的分子框架光电子角分布 (MFPAD) 的测量和 Hartree-Fock 能级计算结果。平均而言，测量的 MFPAD 与计算的 MFPAD 之间的一致性是合理的。测量的 MFPAD 在某些能量下相对于 O+ 和 CO+ 碎片离子表现出微弱但明确的不对称性，为 gerade 和 ungerade 最终离子态的重叠提供了证据，从而导致核心级光电离化的两步模型及其随后的俄歇衰变的部分崩溃。
We report results of measurements and of Hartree-Fock level calculations of molecular-frame photoelectron angular distributions (MFPADs) for C 1s photoemission from CO2. The agreement between the measured and calculated MFPADs is on average reasonable. The measured MFPADs display a weak but definite asymmetry with respect to the O+ and CO+ fragment ions at certain energies, providing evidence for an overlap of gerade and ungerade final ionic states giving rise to a partial breakdown of the two-step model of core-level photoionization and its subsequent Auger decay.