Publication: Investigating the proton-halo structure of 8 B via the extended THSR wave function
Дата
2022
Авторы
Lei, S.
Li, S.
Zhao, Q.
Wan, N.
Ropke, G.
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© 2022, The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature.Due to the proton-halo structure, the 8B nucleus has been attractive for many experimental and theoretical studies. In this work, we perform theoretical calculations on the ground state of 8B through a further extended Tohsaki–Horiuchi–Schuck–Röpke (THSR) wave function. The 8B nucleus is treated as an α + 3He + p system where the two clusters move inside modified containers, which are formulated in this work to describe the various modes of cluster motion. Through variational calculations, it is found that our new THSR wave functions are very efficient in describing the ground state of 8B, which can be accurately described by a superposition of only two basis states, namely the spindle shaped one and the elliptical one. It is of particular interest to find that the latter basis has a dominant contribution to the proton-halo structure. We further illustrate the property of the proton halo in 8B by calculating the radius and the electric quadrupole moment of 8B. The obtained result shows a large electric quadrupole moment in the ground state of 8B, which is in good agreement with the experimental data and other theoretical calculations. It is found that in one basis state, the large electric quadrupole moment is contributed by the polarization of the 7Be core, while in the other basis it is primarily due to the proton halo structure.
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Investigating the proton-halo structure of 8 B via the extended THSR wave function / Lei, S. [et al.] // European Physical Journal A. - 2022. - 58. - № 3. - 10.1140/epja/s10050-022-00705-x
URI
https://www.doi.org/10.1140/epja/s10050-022-00705-x
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https://openrepository.mephi.ru/handle/123456789/28913
https://www.scopus.com/record/display.uri?eid=2-s2.0-85127678908&origin=resultslist
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000776718000002
https://openrepository.mephi.ru/handle/123456789/28913