K 壳层和 L 壳层中空铍的光激发
Photoexcitation of K-shell and L-shell hollow beryllium.
作者信息
Hasegawa Shuichi, Yoshida Fumiko, Matsuoka Leo, Koike Fumihiro, Fritzsche Stephan, Obara Satoshi, Azuma Yoshiro, Nagata Tetsuo
机构信息
Department of Quantum Engineering and Systems Science, The University of Tokyo, Tokyo 113-8656, Japan.
出版信息
Phys Rev Lett. 2006 Jul 14;97(2):023001. doi: 10.1103/PhysRevLett.97.023001.
We have observed K-shell and L-shell hollow beryllium atoms (2s(2)2p3s and 1s3s(2)3p) created by photoexcitation using synchrotron radiation. Resonance shapes were fitted to the Fano profile and the parameters were deduced. A Dirac-Fock calculation was performed to identify the configuration of the peaks and to predict other hollow atomic peaks. The results of the calculation were in good agreement with the experimental data. The comparison of the transition strength has revealed that the three-electron photoexcitation to the 1s3s(2)3p configuration is stronger than the two-electron photoexcitation to the 2s(2)2p3s configuration. This is attributed to the large overlap between the 2s orbital of the ground state (1s(2)2s(2)) with the orbital of the L-shell hollow state (1s3s(2)3p).
我们观测到了通过同步辐射光激发产生的K壳层和L壳层中空铍原子（2s(2)2p3s和1s3s(2)3p）。将共振形状拟合到Fano分布并推导了参数。进行了狄拉克-福克计算以确定峰的组态并预测其他中空原子峰。计算结果与实验数据吻合良好。跃迁强度的比较表明，向1s3s(2)3p组态的三电子光激发比向2s(2)2p3s组态的双电子光激发更强。这归因于基态（1s(2)2s(2)）的2s轨道与L壳层中空态（1s3s(2)3p）的轨道之间有较大重叠。
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