Speaker
Description
We use a multiconfiguration Dirac-Fock code [1,2] to calculate electronic excitation cross sections and radiative decay transition probabilities for a large number of atomic levels in Pm-like bismuth. By numerically solving a set of equilibrium equations we were able to obtain the level populations of the $4f^{14}5s$, $4f^{13} 5s5f$, $4f^{13} 5s5d$, $4f^{13} 5s5p$, and $4f^{13} 5s^2$ configurations and synthesized spectra for a number of electronic density values in an EBIT for 640 keV incident electron energy.
The synthesized spectrum we obtained for $10^{10}$ cm$^{−3}$ electronic density agrees qualitatively with the experimental data of Kobayashi et al. [3]. We found significative differences between our simulations and Kobayashi’s for several electronic density values.
The emission lines position and relative intensity can also be compared with laser produced plasma spectra, to improve the identification of the Pm-like ions and provide experimental values of electron density at those plasma conditions.
References
[1] J. P. Desclaux, Comp. Phys. Commun. 9, 31 (1975)
[2] P. Indelicato and J. P. Desclaux, MCDFGME, a Multi- Configuration Dirac Fock and General Matrix Elements program (release 2022v3), http://kroll.lkb.upmc.fr/mcdf
[3] Y. Kobayashi, D. Kato, H. A. Sakaue, I. Murakami, and N. Nakamura, Phys. Rev. A 89, 010501(R) (2014)
