تقرير
Isomeric states in neutron-rich nuclei around $N = 40$
| العنوان: | Isomeric states in neutron-rich nuclei around $N = 40$ |
|---|---|
| المؤلفون: | Wimmer, K., Recchia, F., Lenzi, S. M., Riccetto, S., Davinson, T., Estrade, A., Griffin, C. J., Nishimura, S., Phong, V., Söderström, P. -A., Aktas, O., Al-Aqeel, M., Ando, T., Baba, H., Bae, S., Choi, S., Doornenbal, P., Ha, J., Harkness-Brennan, L., Isobe, T., John, P. R., Kahl, D., Kiss, G., Kojouharov, I., Kurz, N., Labiche, M., Matsui, K., Momiyama, S., Napoli, D. R., Niikura, M., Nita, C., Saito, Y., Sakurai, H., Schaffner, H., Schrock, P., Stahl, C., Sumikama, T., Werner, V., Witt, W., Woods, P. J. |
| سنة النشر: | 2021 |
| المجموعة: | Nuclear Experiment |
| مصطلحات موضوعية: | Nuclear Experiment |
| الوصف: | Neutron-rich nuclei in the vicinity of the $N=40$ 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 $1g_{9/2}$ orbital. In the present study we searched for isomeric states in nuclei around $N=40$, $Z=22$ produced by projectile fragmentation at RIBF. Delayed $\gamma$ rays were detected by the EURICA germanium detector array. High statistics data allowed for an updated decay scheme of $^{60}$V. The lifetime of an isomeric state in $^{64}$V was measured for the first time in the present experiment. A previously unobserved isomeric state was discovered in $^{58}$Sc. The measured lifetime suggests a parity changing transition, originating from an odd number of neutrons in the $1g_{9/2}$ orbital. The nature of the isomeric state in $^{58}$Sc is thus different from isomers in the less exotic V and Sc nuclei. Comment: PRC accepted |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevC.104.014304 |
| URL الوصول: | http://arxiv.org/abs/2106.13449 |
| رقم الأكسشن: | edsarx.2106.13449 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevC.104.014304 |
|---|