Magnetic rotational band in 116Sb

Systematic study of magnetic and antimagnetic rotational bands

“…For magnetic rotational bands, the B(M1)/B(E2) values are generally more than 20 [μ N /(eb)] 2 [2]. However, some values of MR bands are around 10 [μ N /(eb)] 2 in 106,107,109 Ag, 112 Sb, 128 Ba, 139 Sm, 142 Gd, 144 Dy, 192,196 Hg,and 192,193,194 Pb, smaller than the criterion for magnetic rotation mentioned above. In contrast, the B(M1)/B(E2) values are much larger in some MR bands, for example in 83 Rb whose 106 Sn.…”

“…However, the values of B(E2) are less than 0.1 (eb) 2 in the A ∼ 80 mass region, while the values of B(E2) vary between 0.5 and 1.0 (eb) 2 in 112 Sb. Furthermore, B(E2) decreases as the spin increases except in 108 In, 128 Ba, 141 Eu, and 142 Gd. B(E2) values also show a large staggering in the MR bands of 107 Ag, 137 Nd, and 192 Hg.…”

“…Indeed, most nuclei satisfy this criterion. However, some  ( 2 )/B(E2) values are less than 100 ÿ 2 MeV −1 (eb) −2 in 107 Cd and 142,143 Eu. Moreover, the  ( 2 )/B(E2) roughly grows with the spin increasing except for 110 Cd and 110,112 In.…”

“…The validity of the TAC approximation was discussed and tested in comparison with the particle-rotor model [12]. The Skyrme-Hartree-Fock Method with TAC has been used to investigate MR band in 142 Gd [13]. Because of the high numerical complexity of the TAC model, most of the applications are based on simple phenomenological Hamiltonians, such as the pairing-plus-quadrupolequadrupole tilted-axis cranking (PQTAC) model [14].…”

“…However, it has only been used to investigate magnetic rotation in 84 Rb. In comparison, the two-dimensional cranking CDFT reduces the computing time considerably, and thus can be applied for medium heavy nucleus such as 142 Gd [17]. Moreover, the TAC model based on the CDFT with the pointcoupling interaction was developed by Zhao et al [18], which has been successfully applied for MR ranging from light nuclei 58 Fe [19], 60 Ni [18] to heavy nuclei 198,199 Pb [20].…”