Shell evolution of N = 40 isotones towards 60Ca: First spectroscopy of 62Ti (CROSBI ID 272695)
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Podaci o odgovornosti
Cortés, M.L. ; Rodriguez, W. ; Doornenbal, P. ; Obertelli, A. ; Holt, J.D. ; Lenzi, S.M. ; Menéndez, J. ; Nowacki, F. ; Ogata, K. ; Poves, A. ; Rodríguez, T.R. ; Schwenk, A. ; Simonis, J. ; Stroberg, S.R. ; Yoshida, K. ; Achouri, L. ; Baba, H. ; Browne, F. ; Calvet, D. ; Château, F. ; Chen, S. ; Chiga, N. ; Corsi, A. ; Delbart, A. ; Gheller, J.-M. ; Giganon, A. ; Gillibert, A. ; Hilaire, C. ; Isobe, T. ; Kobayashi, T. ; Kubota, Y. ; Lapoux, V. ; Liu, H.N. ; Motobayashi, T. ; Murray, I. ; Otsu, H. ; Panin, V. ; Paul, N. ; Sakurai, H. ; Sasano, M. ; Steppenbeck, D. ; Stuhl, L. ; Sun, Y.L. ; Togano, Y. ; Uesaka, T. ; Wimmer, K. ; Yoneda, K. ; Aktas, O. ; Aumann, T. ; Chung, L.X. ; Flavigny, F. ; Franchoo, S. ; Gašparić, Igor ; Gerst, R.-B. ; Gibelin, J. ; Hahn, K.I. ; Kim, D. ; Koiwai, T. ; Kondo, Y. ; Koseoglou, P. ; Lee, J. ; Lehr, C. ; Linh, B.D. ; Lokotko, T. ; MacCormick, M. ; Moschner, K. ; Nakamura, T. ; Park, S.Y. ; Rossi, D. ; Sahin, E. ; Sohler, D. ; Söderström, P.-A. ; Takeuchi, S. ; Toernqvist, H. ; Vaquero, V. ; Wagner, V. ; Wang, S. ; Werner, V. ; Xu, X. ; Yamada, H. ; Yan, D. ; Yang, Z. ; Yasuda, M. ; Zanetti, L.
engleski
Shell evolution of N = 40 isotones towards 60Ca: First spectroscopy of 62Ti
Excited states in the N=40 isotone 62Ti were populated via the 63V(p, 2p)62Ti reaction at ∼200 MeV/nucleon at the Radioactive Isotope Beam Factory and studied using γ-ray spectroscopy. The energies of the 21+→0gs+ and 41+→21+ transitions, observed here for the first time, indicate a deformed 62Ti ground state. These energies are increased compared to the neighboring 64Cr and 66Fe isotones, suggesting a small decrease of quadrupole collectivity. The present measurement is well reproduced by large-scale shell-model calculations based on effective interactions, while ab initio and beyond mean-field calculations do not yet reproduce our findings. The shell-model calculations for 62Ti show a dominant configuration with four neutrons excited across the N=40 gap. Likewise, they indicate that the N=40 island of inversion extends down to Z=20, disfavoring a possible doubly magic character of the elusive 60Ca.
Shell evolution ; Radioactive beams ; Gamma-ray spectroscopy
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