학술논문
Pairing-quadrupole interplay in the neutron-deficient tin nuclei: First lifetime measurements of low-lying states in Sn-106,Sn-108
Document Type
Author
Siciliano, M.; Valiente-Dobon, J. J.; Goasduff, A.; Nowacki, F.; Zuker, A. P.; Bazzacco, D.; Lopez-Martens, A.; Clement, E.; Benzoni, G.; Braunroth, T.; Crespi, F. C. L.; Cieplicka-Orynczak, N.; Doncel, M.; Ertuerk, S.; de France, G.; Fransen, C.; Gadea, A.; Georgiev, G.; Goldkuhle, A.; Jakobsson, U.; Jaworski, G.; John, P. R.; Kuti, I; Lemasson, A.; Marchi, T.; Mengoni, D.; Michelagnoli, C.; Mijatovic, T.; Muller-Gatermann, C.; Napoli, D. R.; Nyberg, Johan, 1955; Palacz, M.; Perez-Vidal, R. M.; Saygi, B.; Sohler, D.; Szilner, S.; Testov, D.; Zielinska, M.; Barrientos, D.; Birkenbach, B.; Boston, H. C.; Boston, A. J.; Cederwall, B.; Collado, J.; Cullen, D. M.; Desesquelles, P.; Domingo-Pardo, C.; Dudouet, J.; Eberth, J.; Egea-Canet, F. J.; Gonzalez, V; Harkness-Brennan, L. J.; Hess, H.; Judson, D. S.; Jungclaus, A.; Korten, W.; Labiche, M.; Lefevre, A.; Leoni, S.; Li, H.; Maj, A.; Menegazzo, R.; Million, B.; Pullia, A.; Recchia, F.; Reiter, P.; Salsac, M. D.; Sanchis, E.; Stezowski, O.; Theisen, Ch
Source
Physics Letters B. 806
Subject
Language
English
Abstract
The lifetimes of the low-lying excited states 2(+) and 4(+) have been directly measured in the neutron-deficient Sn-106,Sn-108 isotopes. The nuclei were populated via a deep-inelastic reaction and the lifetime measurement was performed employing a differential plunger device. The emitted gamma rays were detected by the AGATA array, while the reaction products were uniquely identified by the VAMOS++ magnetic spectrometer. Large-Scale Shell-Model calculations with realistic forces indicate that, independently of the pairing content of the interaction, the quadrupole force is dominant in the B(E2; 2(1)(+) -> 0(g.s)(+)) values and it describes well the experimental pattern for Sn104-114 ; the B(E2;(+)(4) -> 2(1)(+)) values, measured here for the first time, depend critically on a delicate pairing-quadrupole balance, disclosed by the very precise results in Sn-108. (C) 2020 The Authors. Published by Elsevier B.V.