Shape coexistence in 66 Se

The nuclear structure of 66Se, nucleus beyond the N=Z line on the proton-rich side of the valley of stability, was investigated by the neutron knock-out reaction 67Se(12C,X)66Se using a 12C target. The analysis of the singles spectrum of the γ-rays emitted during the de-excitation of the populated l...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Physics letters. B 2023, Vol.844
Hauptverfasser: Elekes, Z., Panin, V., Rodríguez, T. R., Sieja, K., Ahn, D. S., Al-Adili, Ali, Baba, H., Stefanescu, A. I., Cook, K. J., Dósa, Cs, Fukuda, N., Gao, J., Gibelin, J., Hahn, K. I., Halász, Z., Huang, S. W., Isobe, T., Juhász, M. M., Kim, D., Kobayashi, T., Kondo, Y., Korkulu, Z., Kurihara, A., Kuti, I., Miki, H., Miki, K., Motobayashi, T., Otsu, H., Saastamoinen, A., Sasano, M., Sato, H., Shimada, T., Shimizu, Y., Sobotka, L. G., Stefanescu, I., Stuhl, L., Suzuki, H., Takeda, H., Togano, Y., Tomai, T., Trache, L., Tudor, D., Uesaka, T., Utsuki, Y., Wang, H., Yasuda, A., Yoneda, K., Yoshitome, Y.
Format: Artikel
Sprache:eng
Schlagworte:
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:The nuclear structure of 66Se, nucleus beyond the N=Z line on the proton-rich side of the valley of stability, was investigated by the neutron knock-out reaction 67Se(12C,X)66Se using a 12C target. The analysis of the singles spectrum of the γ-rays emitted during the de-excitation of the populated low-lying excited states revealed two previously detected (927(4) keV, 1460(32) keV) and three new (744(6) keV, 1210(17) keV, 1661(23) keV) transitions. The 744-keV, the 1210-keV, and the 1460-keV transitions were found to be in coincidence with the one at 927 keV. The spectrum coincident with the 927-keV transition showed a further possible transition at 299(35) keV, which was obscured by significant atomic background in the singles spectrum. This transition might correspond to a peak previously reported at 273(5) keV that could not be assigned to 66Se unambiguously. Based on a comparison of the experimental data to theoretical calculations, four new excited states are proposed which suggest that 66Se exhibits shape coexistence.
ISSN:1873-2445
0370-2693
DOI:10.1016/j.physletb.2023.138072