Line overlap measurement for the photopumping of X-ray lasing transitions between n = 3 and n = 2 autoionizing states of lithium-like Al

• Published in: Optics communications 1994-12, Vol.113 (1), p.204-212
• Main Authors: Elliott, S.R., Beiersdorfer, P., Libby, S.B., Osterheld, A.L., Phillips, T.
• Format: Article
• Language: English
• Subjects: Exact sciences and technology; Fundamental areas of phenomenology (including applications); Lasers; Optics; Physics; X- and γ-ray lasers
• ISSN: 0030-4018; 1873-0310
• DOI: 10.1016/0030-4018(94)90608-4

We performed a detailed measurement of the Kβ spectrum of He-like Al 11+, including the dielectronic satellite spectrum excited by the KLM resonances, and comparisons with theoretical predictions from multi-configuration Dirac-Fock calculations are made. We investigated the possibility of a line overlap between the (1s 22s) J= 1 2 –(1s2s3p) J= 3 2 transition in Li- like Al 10+ and the (2s 22p 6) J=0–(2s 22p 5 1 2 3s) J=1 transition in Ne-like Rb 27+ , situated near 1826 eV, to examine their s uitability for use in a photopumped X-ray laser scheme. In this scheme with lasing at 46 Å, the Rb 27+ line pumps the Al 10+ upper lasing level. The measured difference in the line energies is 0.7 ± 0.1 eV or 380 ppm.