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Experimental study of the $$^{66}$$Ni($$d$$,$$p$$)$$^{67}$$Ni one-neutron transfer reaction

中性子移行反応$$^{66}$$Ni($$d$$,$$p$$)$$^{67}$$Niの実験的研究

Diriken, J.*; Patronis, N.*; Andreyev, A.; Antalic, S.*; Bildstein, V.*; Blazhev, A.*; Darby, I. G.*; De Witte, H.*; Eberth, J.*; Elseviers, J.*; Fedosseev, V. N.*; Flavigny, F.*; Fransen, Ch.*; Georgiev, G.*; Gernh$"a$user, R.*; Hess, H.*; Huyse, M.*; Jolie, J.*; Kr$"o$ll, Th.*; Kr$"u$cken, R.*; Lutter, R.*; Marsh, B. A.*; Mertzimekis, T.*; M$"u$cher, D.*; Orlandi, R.; Pakou, A.*; Raabe, R.*; Randisi, G.*; Reiter, P.*; Roger, T.*; Seidlitz, M.*; Seliverstov, M.*; Sotty, C.*; Tornqvist, H.*; Van De Walle, J.*; Van Duppen, P.*; Voulot, D.*; Warr, N.*; Wenander, F.*; Wimmer, K.*; Muecher, D.*

Diriken, J.*; Patronis, N.*; Andreyev, A.; Antalic, S.*; Bildstein, V.*; Blazhev, A.*; Darby, I. G.*; De Witte, H.*; Eberth, J.*; Elseviers, J.*; Fedosseev, V. N.*; Flavigny, F.*; Fransen, Ch.*; Georgiev, G.*; Gernh$"a$user, R.*; Hess, H.*; Huyse, M.*; Jolie, J.*; Kr$"o$ll, Th.*; Kr$"u$cken, R.*; Lutter, R.*; Marsh, B. A.*; Mertzimekis, T.*; M$"u$cher, D.*; Orlandi, R.; Pakou, A.*; Raabe, R.*; Randisi, G.*; Reiter, P.*; Roger, T.*; Seidlitz, M.*; Seliverstov, M.*; Sotty, C.*; Tornqvist, H.*; Van De Walle, J.*; Van Duppen, P.*; Voulot, D.*; Warr, N.*; Wenander, F.*; Wimmer, K.*; Muecher, D.*

Excited states up to an excitation energy of 5.8 MeV were populated in the neutron-rich isotope $$^{67}$$Ni via the $$^{66}$$Ni(d,p) transfer reaction at REX-Isolde, CERN. In particular, single-neutron states above the N=40 sub-shell gap were populated, and the relative spectroscopic factors were extracted using distorted-wave Born approximation analysis. The positive parity g$$_{9/2}$$, d$$_{5/2}$$ and s$$_{1/2}$$ neutron orbits above the shell closure are assumed to induce strong quadrupole collectivity in neutron-rich Fe and Cr isotopes. The extracted relative spectroscopic factors show that the strength of the d$$_{5/2}$$ orbit is mostly split over two states, hinting to substantial mixing of the neutron d$$_{5/2}$$ configuration with collective modes of the core. The size of the N=50 shell gap was also estimated, and found to be 2.6 MeV near $$^{68}$$Ni, as also determined in lighter Ni isotopes.

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パーセンタイル:45.25

分野:Physics, Nuclear

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