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

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Wimmer, K, Recchia, F, Lenzi, SM, Riccetto, S, Davinson, T, Estrade, A, Griffin, CJ, Nishimura, S, Nowacki, F, Phong, V et al (show 32 more authors) , Poves, A, Soderstrom, 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, PR, Kahl, D, Kiss, G, Kojouharov, I, Kurz, N, Labiche, M, Matsui, K, Momiyama, S, Napoli, DR, Niikura, M, Nita, C, Saito, Y, Sakurai, H, Schaffner, H, Schrock, P, Stahl, C, Sumikama, T, Werner, V, Witt, W and Woods, PJ (2019) First spectroscopy of Ti-61 and the transition to the Island of Inversion at N=40. PHYSICS LETTERS B, 792. pp. 16-20.

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Abstract

Isomeric states in 59,61Ti have been populated in the projectile fragmentation of a 345 AMeV 238U beam at the Radioactive Isotope Beam Factory. The decay lifetimes and delayed γ-ray transitions were measured with the EURICA array. Besides the known isomeric state in 59Ti, two isomeric states in 61Ti 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 59Ti and 61Ti belong to the Island of Inversion at N = 40 with ground state configurations dominated by particle-hole excitations to the g9/2 and d5/2 orbits.

Item Type:	Article
Uncontrolled Keywords:	Radioactive beams, Gamma-ray spectroscopy, Isomeric decay, Shell evolution, Island of Inversion
Depositing User:	Symplectic Admin
Date Deposited:	12 Dec 2019 10:27
Last Modified:	19 Jan 2023 00:12
DOI:	10.1016/j.physletb.2019.03.018
Open Access URL:	https://www.sciencedirect.com/science/article/pii/...
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3066072