Possible antimagnetic rotational band and neutron alignment in 113In
Abstract
High-spin states of 113In have been populated using the 110Pd(7Li,4 n )113In reaction at beam energies of 38 and 50 MeV. More than 50 new γ transitions are observed in 113In. Three previously observed magnetic dipole bands are extended to higher spin states, and several new E 2 crossover transitions within the bands are observed in two of the dipole bands. A new positive-parity ▵ I =2 band built on the π d5 /2 configuration is established. The known ▵ I =2 band is extended to 51 /2+ state, and a gentle up-bend associated to the alignment of neutrons in the normal-parity ν g7 /2/d5 /2 orbitals is found. The properties of this band are discussed based on the self-consistent tilted axis cranking relativistic mean-field model calculations. The predicted B (E 2 ) , deformation parameters β2 and γ , and J(2 )/B (E 2 ) ratios indicate that the ▵ I =2 band based on the π g9/2 -2g7 /2⊗ν (h11/2) 2 and π g9/2 -2g7 /2⊗ν (h11/2) 2(g7/2/d5 /2) 2 configurations, has the characteristics of antimagnetic rotation. Furthermore, the two-shears-like mechanism for the possible antimagnetic rotational bands is examined by investigating the orientation of the angular momenta.
- Publication:
-
Physical Review C
- Pub Date:
- July 2019
- DOI:
- 10.1103/PhysRevC.100.014326
- Bibcode:
- 2019PhRvC.100a4326M