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Report No.

Study of the deformation-driving $$nu$$d$$_{5/2}$$ orbital in $$_{28}^{67}$$Ni$$_{39}$$ using one-neutron transfer reactions

Diriken, J.*; Patronis, N.*; Andreyev, A. N.*; 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.*; Nowacki, F.*; Orlandi, R. ; Pakou, A.*; Raabe, R.*; Randisi, G.*; Reiter, P.*; Roger, T.*; Seidlitz, M.*; Seliverstov, M.*; Sieja, K.*; Sotty, C.*; Tornqvist, H.*; Van De Walle, J.*; Van Duppen, P.*; Voulot, D.*; Warr, N.*; Wenander, F.*; Wimmer, K.*

The neutron orbits $$g_{9/2}$$, d$$_{5/2}$$ and s$$_{1/2}$$ are assumed to be responsible for the swift onset of collectivity observed in the region below $$^{68}$$Ni. In order to gather information on the single-particle energies and spectroscopic factors of these orbitals, single-particle states in the nucleus $$^{67}$$Ni were populated using the reaction $$^{66}$$Ni(d,p), in inverse kinematics, at REX-ISOLDE, CERN. The new isotope was studied using combined particle-$$gamma$$ spectroscopy. Comparison with DWBA calculations, permitted the identification of positive parity states with a substantial amount of $$nu$$d$$_{9/2}$$ (1007 keV) and $$nu$$d$$_{5/2}$$ (2207 and 3277 keV) single-particle strength. Comparisons with extended Shell-Model calculations was also performed to confirm the single-particle nature of these states, and to deduce general properties around $$^{68}$$Ni.



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Category:Astronomy & Astrophysics



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