Anomalous Target Z Dependence of Double to Single K-Shell Vacancy Production in Cl-Beam X Rays
Anomalous Target Z Dependence of Double to Single K-Shell Vacancy Production in Cl-Beam X Rays
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DOI：
10.1103/physrevlett.31.1
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发表时间：
1973-07
影响因子：
8.6
通讯作者：
C. Woods;F. Hopkins;R. Kauffman;D. O. Elliott;K. Jamison;P. Richard
中科院分区：
文献类型：
--
作者：
C. Woods;F. Hopkins;R. Kauffman;D. O. Elliott;K. Jamison;P. Richard
我们已经测量了来自30 MeV Cl束的X射线对碳和铜之间的各种固体靶的照射。Cl中双K壳层与单K壳层空位产生的比率在Z= 20（Ca）附近呈现宽峰。这种行为不是库仑电离所预测的。使用分子轨道机制检查这种峰化。为了解释这一结果，必须将K壳层电子提升到Cl束的空轨道。这是双K壳层促进的第一个证据。
We have measured X rays from 30-MeV Cl beams on various solid targets between carbon and copper. The ratio of double K-shell to single K-shell vacancy production in Cl exhibits a broad peak near Z= 20 (Ca). This behavior is not predicted by Coulomb ionization. This peaking is examined using a molecular-orbital mechanism. To explain the results both K-shell electrons must be promoted to the vacant orbitals of the Cl beam. This is the first evidence of double K-shell promotion.