Paper
Ab initio calculations of nuclear charge radii across and beyond ${}^{132}$Sn: Putting chiral EFT nuclear interactions to the test
Authors
Pepijn Demol, Urban Vernik, Thomas Duguet, Alexander Tichai
Abstract
Charge radii are investigated along the Tin isotopic chain via ab initio Bogoliubov coupled cluster calculations at the singles and doubles level. In addition to the reproduction of absolute radii, the parabolic behavior of isotopic shifts between the N = 50 and N = 82 magic numbers and the kink through ${}^{132}$Sn are shown to provide stringent tests for state-of-the-art chiral effective field theory ($χ$EFT) inter-nucleon interactions. Indeed, none of the employed fine-tuned interactions can capture all such key characteristics. Eventually, the pronounced sensitivity of the results to the employed Hamiltonian beyond ${}^{132}$Sn provides a unique playground to pin down critical attributes of $χ$EFT inter-nucleon interactions in the future. This calls for measuring isotopic shifts both towards ${}^{100}$Sn and beyond ${}^{134}$Sn, as well as for performing high-accuracy ab initio calculations of mean-square radii in heavy open-shell nuclei by adding both triples corrections to the many-body wave function and the two-body charge density correction to the operator
Metadata
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Raw Data (Debug)
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"raw_xml": "<entry>\n <id>http://arxiv.org/abs/2602.22030v1</id>\n <title>Ab initio calculations of nuclear charge radii across and beyond ${}^{132}$Sn: Putting chiral EFT nuclear interactions to the test</title>\n <updated>2026-02-25T15:37:24Z</updated>\n <link href='https://arxiv.org/abs/2602.22030v1' rel='alternate' type='text/html'/>\n <link href='https://arxiv.org/pdf/2602.22030v1' rel='related' title='pdf' type='application/pdf'/>\n <summary>Charge radii are investigated along the Tin isotopic chain via ab initio Bogoliubov coupled cluster calculations at the singles and doubles level. In addition to the reproduction of absolute radii, the parabolic behavior of isotopic shifts between the N = 50 and N = 82 magic numbers and the kink through ${}^{132}$Sn are shown to provide stringent tests for state-of-the-art chiral effective field theory ($χ$EFT) inter-nucleon interactions. Indeed, none of the employed fine-tuned interactions can capture all such key characteristics. Eventually, the pronounced sensitivity of the results to the employed Hamiltonian beyond ${}^{132}$Sn provides a unique playground to pin down critical attributes of $χ$EFT inter-nucleon interactions in the future. This calls for measuring isotopic shifts both towards ${}^{100}$Sn and beyond ${}^{134}$Sn, as well as for performing high-accuracy ab initio calculations of mean-square radii in heavy open-shell nuclei by adding both triples corrections to the many-body wave function and the two-body charge density correction to the operator</summary>\n <category scheme='http://arxiv.org/schemas/atom' term='nucl-th'/>\n <category scheme='http://arxiv.org/schemas/atom' term='nucl-ex'/>\n <published>2026-02-25T15:37:24Z</published>\n <arxiv:comment>8 pages, 5 figures</arxiv:comment>\n <arxiv:primary_category term='nucl-th'/>\n <author>\n <name>Pepijn Demol</name>\n </author>\n <author>\n <name>Urban Vernik</name>\n </author>\n <author>\n <name>Thomas Duguet</name>\n </author>\n <author>\n <name>Alexander Tichai</name>\n </author>\n </entry>"
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