Bulletin of the American Physical Society
55th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Monday–Friday, June 3–7, 2024; Fort Worth, Texas
Session S00: Poster Session III (4pm-6pm CDT)
4:00 PM,
Thursday, June 6, 2024
Room: Hall BC
Abstract: S00.00158 : Computations of forbidden transition probabilities in lanthanide ions of interest for kilonova nebular phase analysis
Presenter:
Lucas Maison
(Université de Mons (UMONS))
Authors:
Lucas Maison
(Université de Mons (UMONS))
Patrick Palmeri
(Université de Mons (UMONS))
Pascal Quinet
(Université de Mons (UMONS), Université de Liège (ULG))
In order to extend the study of kilonovae in their nebular phase, we carried out new calculations of transition probabilities for M1 and E2 lines between low-lying levels in singly and doubly ionized lanthanide atoms. Given the lack of data in the literature, two theoretical methods were used in this work to model the atomic structure of these ions and to compute the radiative parameters. The first one is the fully-relativistic Multi-Configurational-Dirac-Hartree-Fock (MCDHF) method with the GRASP2018 code. The computed values were then compared to the results deduced from pseudo-relativistic Hartree-Fock (HFR) calculations in order to check their reliability. This allowed us to obtain a new consistent set of atomic data and to highlight the most intense lanthanides forbidden lines which are likely to be observed in the infrared spectrum of kilonovae in their nebular phase.
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