Tilted dipole bands in123Xe

Abstract

High-spin states in 123 Xe were populated in the 110 Pd( 18 O,5n) reaction at 75 MeV and gamma-ray coincidences were measured with the GASP spectrometer. A new rotational sequence of enhanced dipole transitions was established. This band, as well as a similar band in 124 Xe, may be described within the framework of the tilted axis cranking model as bands for which comparable amounts of angular momentum are generated by magnetic and collective rotation, respectively.

Comment on “Probing nuclear structure ofXe124”

“…4 from Ref. [7]). In this Comment we show that also the absolute B (M1) and B(E2) values are reproduced as well.…”

“…In the first scenario [1][2][3] these bands are considered as collective bands built on 4qp excitations in which the angular momentum is generated predominantly by the collective rotation of the deformed core. The other scenario involves the shears mechanism [4], which is thought to play an important role in the structure of these bands [5][6][7]. Here the shears mechanism, which has originally been suggested in order to explain the angular momentum generation in nearly spherical nuclei, occurs on a deformed core, forming the so-called magnetic rotational bands of intermediate nature [6].…”

“…The fact that there are dipole bands which can be described only within the TAC model has been encountered for the first time in 123 Xe [7]. In the same work we have already demonstrated that the TAC model reproduces the experimental B(M1)/B(E2) ratios in the dipole band in 124 Xe for the lowest-lying 4qp positive parity π [h 11/2 (d 5/2 /g 7/2 )] ⊗ ν[h 11/2 (d 5/2 /g 7/2 )] configuration at an equilibrium deformation 2 ≈ 0.19, γ ≈ 30 • (see Fig.…”

Observation of high-spin bands with large moments of inertia inXe124

“…The level scheme of 124 Xe was investigated in previous studies and collective bands were established up to spin I ∼ 20 -30 [3,[16][17][18][19][20]. An extensive level scheme up to I ∼ 35 with several new rotational bands and noncollective terminating states was reported by Al-Khatib et al [6].…”

Lifetime measurements inSb112

“…G. Rainovski et al [10] had shown that comparable amounts of angular momentum were generated by the shears mechanism and collective rotation in 124 Xe, for which the deformation parameters are 2 ∼ 0.19 and γ ∼ 30 • . J. Cederkäll et al [11] have deduced the quadrupole moment, Q 0 = 2.7 e b, for the πg 9/2 −1 ⊗ νh 11/2 band in 108 Sb, from the Total Routhian Surfaces (TRS) calculations.…”