Isomeric states in neutron-rich nuclei around $N = 40$
Abstract
Neutron-rich nuclei in the vicinity of the island of inversion are characterized by shell evolution and exhibit deformed ground states. In several nuclei isomeric states have been observed and attributed to excitations to the intruder neutron orbital. In the present study we searched for isomeric states in nuclei around , produced by projectile fragmentation at RIBF. Delayed rays were detected by the EURICA germanium detector array. High statistics data allowed for an updated decay scheme of V. The lifetime of an isomeric state in V was measured for the first time in the present experiment. A previously unobserved isomeric state was discovered in Sc. The measured lifetime suggests a parity changing transition, originating from an odd number of neutrons in the orbital. The nature of the isomeric state in Sc is thus different from isomers in the less exotic V and Sc nuclei.
Keywords
Cite
@article{arxiv.2106.13449,
title = {Isomeric states in neutron-rich nuclei around $N = 40$},
author = {K. Wimmer and F. Recchia and S. M. Lenzi and S. Riccetto and T. Davinson and A. Estrade and C. J. Griffin and S. Nishimura and V. Phong and P. -A. Söderström and O. Aktas and M. Al-Aqeel and T. Ando and H. Baba and S. Bae and S. Choi and P. Doornenbal and J. Ha and L. Harkness-Brennan and T. Isobe and P. R. John and D. Kahl and G. Kiss and I. Kojouharov and N. Kurz and M. Labiche and K. Matsui and S. Momiyama and D. R. Napoli and M. Niikura and C. Nita and Y. Saito and H. Sakurai and H. Schaffner and P. Schrock and C. Stahl and T. Sumikama and V. Werner and W. Witt and P. J. Woods},
journal= {arXiv preprint arXiv:2106.13449},
year = {2021}
}
Comments
PRC accepted