Lifetime measurements in 80Br and a new region for observation of chiral electromagnetic selection rule
Lifetime measurements in 80Br and a new region for observation of chiral electromagnetic selection rule
Guoa, R. J.; Wang, S. Y.; Schwengner, R.; Xu, W. Z.; Qi, B.; Liu, C.; Rohilla, A.; Dönau, F.; Servene, T.; Schnare, H.; Reif, J.; Winter, G.; Käubler, L.; Prade, H.; Skoda, S.; Eberth, J.; Thomas, H. G.; Becker, F.; Fiedler, B.; Freund, S.; Kasemann, S.; Steinhardt, T.; Thelen, O.; Härtlein, T.; Ender, C.; Köck, F.; Reiter, P.; Schwalm, D.
Level lifetimes for the candidate chiral doublet bands of 80 Br were extracted
by means of the Doppler-shift attenuation method. The absolute transition
probabilities derived from the lifetimes agree well with the M 1 and E2 chiral
electromagnetic selection rules, and the calculations reported in the frame-
work of triaxial particle rotor model [S.Y. Wang et al., Phys. Lett. B 703
(2011) 40] also support ï¬rmly for the chirality in 80 Br. Such good agree-
ments among the experimental data, selection rules of chiral doublet bands
and theoretical calculations are rare and outstanding in researches of nuclear
chirality. Besides odd-odd Cs isotopes, odd-odd Br isotopes in the A â 80
mass region represent another territory that exhibits the ideal selection rules
expected for chiral doublet bands.
Keywords: Nuclear Structure; Level lifetime measurements; Transition probabilities; Chiral bands
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Physics Letters B 833(2022), 137344
DOI: 10.1016/j.physletb.2022.137344
Cited 2 times in Scopus
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