Microscopic Calculation of Electric Quadrupole Effective Charges in Exotic Nuclei
Abstract
Electric quadrupole (E2) effective charges are evaluated based on the self-consistent relativistic Hartree-Fock single-particle states, with core-polarization corrections resummed to all orders using the Tamm-Dancoff approximation (TDA). Configuration-interaction relativistic Hartree-Fock (CI-RHF) calculations employing the TDA effective charges well reproduce the B(E2) strength for neon isotopes from stability to the neutron drip line. We find that polarization charges associated with continuum states are significantly quenched due to their extended density distributions and weak coupling to the core, underscoring the critical role of continuum effects in E2 transition evaluations for exotic nuclei. Moreover, the CI-RHF model predicts a suppressed B(E2; 2+2 → 0+2) in 30Ne, together with strong in-band B(E2) strengths of the yrast band, suggesting the coexistence of a nearly spherical excited 0+2 state and a deformed ground state within the N=20 "island of inversion".
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BibTeX
@misc{liu2026microscopic,
title = {{Microscopic Calculation of Electric Quadrupole Effective Charges in Exotic Nuclei}},
author = {Jia Liu and Yong Peng and Xiao-Yan Zhu and Xiao-Hua Li and Wen Luo and Yi-Fei Niu and Wen-Hui Long},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.04044},
eprint = {2609.04044},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.04044},
}
RIS
TY - UNPB
TI - Microscopic Calculation of Electric Quadrupole Effective Charges in Exotic Nuclei
AU - Jia Liu
AU - Yong Peng
AU - Xiao-Yan Zhu
AU - Xiao-Hua Li
AU - Wen Luo
AU - Yi-Fei Niu
AU - Wen-Hui Long
PY - 2026
DA - 2026/09/03
PB - arXiv
DO - 10.48550/arxiv.2609.04044
UR - https://arxiv.org/abs/2609.04044
AB - Electric quadrupole (E2) effective charges are evaluated based on the self-consistent relativistic Hartree-Fock single-particle states, with core-polarization corrections resummed to all orders using the Tamm-Dancoff approximation (TDA). Configuration-interaction relativistic Hartree-Fock (CI-RHF) calculations employing the TDA effective charges well reproduce the B(E2) strength for neon isotopes from stability to the neutron drip line. We find that polarization charges associated with continuum states are significantly quenched due to their extended density distributions and weak coupling to the core, underscoring the critical role of continuum effects in E2 transition evaluations for exotic nuclei. Moreover, the CI-RHF model predicts a suppressed B(E2; 2^+_2 → 0^+_2) in ^30Ne, together with strong in-band B(E2) strengths of the yrast band, suggesting the coexistence of a nearly spherical excited 0^+_2 state and a deformed ground state within the N=20 "island of inversion".
ER -