"Stapler" mechanism for a dipole band in 79Se
Abstract
The spectroscopy of 79Se is studied via the 82Se(α , α 3 n )79Se fusion-evaporation reaction. A negative-parity magnetic dipole band in 79Se is established for the first time. Based on the calculations by the self-consistent tilted axis cranking covariant density functional theory, this new dipole band can be classified as a "stapler" band, which has a relatively stable symmetric prolate deformation as a function of rotational frequency. Hence, it is demonstrated that the stapler bands exist not only in the oblate and triaxial nuclei, but also in prolate nuclei. By examining the angular momentum coupling, it is found that the five valence nucleons in the high-j orbitals play a major role in the closing of the stapler.
- Publication:
-
Physical Review C
- Pub Date:
- October 2019
- DOI:
- 10.1103/PhysRevC.100.044318
- Bibcode:
- 2019PhRvC.100d4318L