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arXiv · 2210.15227

Ab initio no-core shell model study of neutron-rich $^{18,19,20}$C isotopes

Priyanka Choudhary·Praveen C. Srivastava
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Abstract

We implement the ab initio no-core shell model approach to study neutron-rich $^{18}$C, $^{19}$C and $^{20}$C isotopes. For this purpose, we employ charge-dependent Bonn 2000 (CDB2K), inside non-local outside Yukawa (INOY) and chiral next-to-next-to-next-to-leading order (N$^{3}$LO) nucleon-nucleon interactions. Low-lying energy spectra, electromagnetic properties and point-proton radii for these nuclei up to basis space $N_{\rm max}$ = 4 are calculated. Binding energies obtained with INOY interaction are in better agreement with the experimental values as compared to other \textit{ab initio} interactions. We also show the behavior of ground state energy and point-proton radii with the NCSM parameters, $\hbar$$Ω$ and $N_{\rm max}$. We report a strong sensitivity of the B(E2) values from the first excited $2^+$ to the ground state of $^{18}$C and $^{20}$C to the nuclear interaction. Shell model calculations with YSOX interaction are also performed, and corresponding results are compared with ab initio one.

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Priyanka Choudhary, Praveen C. Srivastava. 2022-10-27. Ab initio no-core shell model study of neutron-rich $^{18,19,20}$C isotopes. https://doi.org/10.1016/j.nuclphysa.2022.122565

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