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- W2891551731 abstract "The structure of the $N=Z$ nucleus $^{28}$Si is studied by resorting to an IBM-type formalism with $s$ and $d$ bosons representing isospin $T=0$ and angular momentum $J=0$ and $J=2$ quartets, respectively. $T=0$ quartets are four-body correlated structures formed by two protons and two neutrons. The microscopic nature of the quartet bosons, meant as images of the fermionic quartets, is investigated by making use of a mapping procedure and is supported by the close resemblance between the phenomenological and microscopically derived Hamiltonians. The ground state band and two low-lying side bands, a $beta$ and a $gamma$ band, together with all known $E2$ transitions and quadrupole moments associated with these states are well reproduced by the model. An analysis of the potential energy surface places $^{28}$Si, only known case so far, at the critical point of the U(5)-$overline{rm SU(3)}$ transition of the IBM structural diagram." @default.
- W2891551731 created "2018-09-27" @default.
- W2891551731 creator A5005278595 @default.
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- W2891551731 date "2018-11-01" @default.
- W2891551731 modified "2023-10-16" @default.
- W2891551731 title "Quartet structure of N = Z nuclei in a boson formalism: The case of 28Si" @default.
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- W2891551731 doi "https://doi.org/10.1016/j.physletb.2018.09.011" @default.
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