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001-es BibID:	BIBFORM117209
035-os BibID:	(Scopus)85178142723 (WoS)001114520800001
Első szerző:	Van Isacker, P.
Cím:	Gamow-Teller Beta Decay and Pseudo-SU(4) Symmetry / Piet Van Isacker, Alejandro Algora, András Vitéz-Sveiczer, Gábor Gyula Kiss, Sonja Elena Agata Orrigo, Berta Rubio, Pablo Aguilera
Dátum:	2023
ISSN:	2073-8994
Megjegyzések:	We report on recent experimental results on b decay into self-conjugate (N = Z) nuclei with mass number 58 A 70. Super-allowed b decays from the Jp = 0+ ground state of a Z = N + 2 parent nucleus are to the isobaric analogue state through so-called Fermi transitions and to Jp = 1+ states by way of Gamow?Teller (GT) transitions. The operator of the latter decay is a generator of Wigner's SU(4) algebra and as a consequence GT transitions obey selection rules associated with this symmetry. Since SU(4) is progressively broken with increasing A, mainly as a consequence of the spin? orbit interaction, this symmetry is not relevant for the nuclei considered here. We argue, however, that the pseudo-spin?orbit splitting can be small in nuclei with 58 A 70, in which case nuclear states exhibit an approximate pseudo-SU(4) symmetry. To test this conjecture, GT decay strength is calculated with use of a schematic Hamiltonian with pseudo-SU(4) symmetry. Some generic features of the GT b decay due to pseudo-SU(4) symmetry are pointed out. The experimentally observed GT strength indicates a restoration of pseudo-SU(4) symmetry for A = 70.
Tárgyszavak:	Természettudományok Fizikai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk Gamow-Teller beta decay pseudo-SU(4) symmetry odd-odd N = Z nuclei
Megjelenés:	Symmetry. - 15 : 11 (2023), p. 1-15. -
További szerzők:	Algora, Alejandro (fizikus) Vitéz-Sveiczer András (1995-) (Fizikus) Kiss Gábor Gyula (1979-) (kísérleti fizikus) Orrigo, Sonja Elena Agata (fizikus) Rubio, Berta (fizikus) Aguilera, Pablo (fizikus)
Pályázati támogatás:	NN128072 K128729
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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