First spectroscopy of Ti-61 and the transition to the Island of Inversion at N=40

First spectroscopy of Ti-61 and the transition to the Island of Inversion at N=40

Isomeric states in Ti-59,Ti-61 have been populated in the projectile fragmentation of a 345 AMeV( 238)U beam at the Radioactive Isotope Beam Factory. The decay lifetimes and delayed gamma-ray transitions were measured with the EURICA array. Besides the known isomeric state in Ti-59, two isomeric sta...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Physics letters. B 2019, Vol.792, p.16
Hauptverfasser: Wimmer, K., Recchia, F., Lenzi, S. M., Riccetto, S., Davinson, T., Estrade, A., Griffin, C. J., Nishimura, S., Nowacki, F., Phong, V., Poves, A., Soderstrom, P-A, Aktas, Özge, 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.
Format: Artikel
Sprache:eng
Schlagworte:
Gamma-ray spectroscopy
Island of Inversion
Isomeric decay
Radioactive beams
Shell evolution
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Isomeric states in Ti-59,Ti-61 have been populated in the projectile fragmentation of a 345 AMeV( 238)U beam at the Radioactive Isotope Beam Factory. The decay lifetimes and delayed gamma-ray transitions were measured with the EURICA array. Besides the known isomeric state in Ti-59, two isomeric states in Ti-61 are observed for the first time. Based on the measured lifetimes, transition multipolarities as well as tentative spins and parities are assigned. Large-scale shell model calculations based on the modified LNPS interaction show that both Ti-59 and Ti-61 belong to the Island of Inversion at N = 40 with ground state configurations dominated by particle-hole excitations to the g(9/2 )and d(5/2) orbits.
ISSN:1873-2445
0370-2693
DOI:10.1016/j.physletb.2019.03.018