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The European Physical Journal D

Line shape parameters study of the 6p7p (1P1, 3D1 and 3P1): Autoionizing resonances in barium

Mazhar Ali Kalyar, Shaukat Mahmood, Sami Ul Haq, Nasir Amin, Muhammad Aslam Baig

Published Oct 19, 2006• 7 citations
Publisher
DOI
10.1140/epjd/e2006-00235-7

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The line contour of the autoionizing resonance of 6P7P configuration in barium atoms was experimentally studied in the range of energies. 52,100 cm−1 with the help of a two‐step ionization of via intermediate states 6s6p (1P1), 6s8p (1P1). Using various combinations of polarization of the first‐ and second‐step laser, both linear and circular dichroism were meausred in the process of ionization from an excited state. Theoretical expressions governing linear and circular dichroism are derived. Using these expression, the values of two parameters used in the theory (the ratios of dipole matrix elements from the excited state, squared) were obtained from the experimental data.