Angular distributions and correlations in auger cascades of atomic argon following 2p→4s excitation

Ueda, K.; Shimizu, Y.; Chiba, H.; Sato, Y.; Kitajima, M.; Tanaka, H.; Huttula, S.-M.; Aksela, H.; Sazhina, I. P.; Kabachnik, N. M.
February 2000
AIP Conference Proceedings;2000, Vol. 506 Issue 1, p148
Academic Journal
We have measured the angular distributions of the resonant Auger and the second-step Auger electrons ejected in the processes Ar[sup *](2p[sup 5]3s[sup 2]3p[sup 6]([sup 2]P[sub j0])4s, J[sub 0]=1)→Ar[sup *+](2p[sup 6]3s3p[sup 5]([sup 1]P[sub 1])4s[sup 2]P[sub 1/2,3/2])+e[sub 1][sup -] and Ar[sup *+](2p[sup 6]3s3p[sup 5]([sup 1]P[sub 1])4s[sup 2]P[sub 1/2,3/2])→Ar[sup ++](2p[sup 6]3s[sup 2]3p[sup 43]P[sub 0,1,2])+e[sub 2][sup -], respectively, and the angular correlations between these two electrons. Based on these results, we discuss a key role of the lifetime interference effect in the angular distribution of the second-step Auger electrons and the extraction of the Auger amplitudes from the experimental data. The experimental results are compared with the multi-configuration Dirac-Fock calculations. © 2000 American Institute of Physics.


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