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Physics Letters B 736 (2014) 533–538
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Physics Letters B
www.elsevier.com/locate/physletb
Study of the deformation-driving νd
5/2
orbital in
67
28
Ni
39
using one-neutron transfer reactions
J. Diriken
a,b,∗
, N. Patronis
a,c
, A.N. Andreyev
a,d,e
, S. Antalic
f
, V. Bildstein
g
, A. Blazhev
h
,
I.G. Darby
a
, H. De Witte
a
, J. Eberth
h
, J. Elseviers
a
, V.N. Fedosseev
i
, F. Flavigny
a
,
Ch. Fransen
h
, G. Georgiev
j
, R. Gernhauser
g
, H. Hess
h
, M. Huyse
a
, J. Jolie
h
, Th. Kröll
g
,
R. Krücken
g
, R. Lutter
k
, B.A. Marsh
i
, T. Mertzimekis
l
, D. Muecher
g
, F. Nowacki
m,n
,
R. Orlandi
a,o,p
, A. Pakou
c
, R. Raabe
a
, G. Randisi
a
, P. Reiter
h
, T. Roger
a
, M. Seidlitz
h
,
M. Seliverstov
a,i
, K. Sieja
m,n
, C. Sotty
j
, H. Tornqvist
q
, J. Van De Walle
q
, P. Van Duppen
a
,
D. Voulot
i
, N. Warr
h
, F. Wenander
i
, K. Wimmer
g,r
a
KU Leuven, Instituut voor Kern- en Stralingsfysica, Celestijnenlaan 200D, 3001 Leuven, Belgium
b
Belgian Nuclear Research Centre SCK·CEN, Boeretang 200, B-2400 Mol, Belgium
c
Department of Physics and HINP, The University of Ioannina, 45110 Ioannina, Greece
d
Department of Physics, University of York, YO10 5DD, United Kingdom
e
Advanced Science Research Center, Japan Atomic Energy Agency (JAEA), Tokai-mura, 319-1195, Japan
f
Department of Nuclear Physics and Biophysics, Comenius University, 84248 Bratislava, Slovakia
g
Physik Department E12, Technische Universität München, D-85748 Garching, Germany
h
IKP, University of Cologne, D-50937 Cologne, Germany
i
AB Department, CERN 1211, Geneva 23, Switzerland
j
CSNSM, CNRS/IN2P3, Universite Paris-Sud 11, UMR8609, F-91405 ORSAY Campus, France
k
Fakultät für Physik, Ludwig-Maximilians-Universität München, D-85748 Garching, Germany
l
INP, NCSR “Demokritos”, GR-15310, Ag. Paraskevi/Athens, Greece
m
Université de Strasbourg, IPHC, 23 rue du Loess, 67037 Strasbourg, France
n
CNRS, UMR7178, 67037 Strasbourg, France
o
School of Engineering, University of the West of Scotland, Paisley , PA1 2BE, United Kingdom
p
The Scottish Universities Physics Alliance (SUPA), United Kingdom
q
PH Department, CERN 1211, Geneva 23, Switzerland
r
Department of Physics, Central Michigan University, Mount Pleasant, MI 48859, USA
a r t i c l e i n f o a b s t r a c t
Article history:
Received
5 May 2014
Received
in revised form 21 July 2014
Accepted
2 August 2014
Available
online 7 August 2014
Editor:
V. Metag
Keywords:
Nuclear
physics
One-nucleon
transfer reactions
RIBs
Nuclear
structure
The νg
9/2
, d
5/2
, s
1/2
orbitals are assumed to be responsible for the swift onset of collectivity observed
in the region below
68
Ni. Especially the single-particle energies and strengths of these orbitals are of
importance. We studied such properties in the nearby
67
Ni nucleus, by performing a (d, p)-experiment
in inverse kinematics employing a post-accelerated radioactive ion beam (RIB) at the REX-ISOLDE facility.
The experiment was performed at an energy of 2.95 MeV/u using a combination of the T-REX particle
detectors, the Miniball γ -detection array and a newly-developed delayed-correlation technique as to
investigate μs-isomers. Angular distributions of the ground state and multiple excited states in
67
Ni
were obtained and compared with DWBA cross-section calculations, leading to the identification of
positive-parity states with substantial νg
9/2
(1007 keV) and νd
5/2
(2207 keV and 3277 keV) single-
particle
strengths up to an excitation energy of 5.8 MeV. 50% of the νd
5/2
single-particle strength
relative to the νg
9/2
-orbital is concentrated in and shared between the first two observed 5/2
+
levels.
Acomparison with extended Shell Model calculations and equivalent (
3
He, d) studies in the region around
90
40
Zr
50
highlights similarities for the strength of the negative-parity pf and positive-parity g
9/2
state, but
differences are observed for the d
5/2
single-particle strength.
© 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license
(http://creativecommons.org/licenses/by/3.0/). Funded by SCOAP
3
.
*
Corresponding author.
E-mail
address: jandiriken@gmail.com (J. Diriken).
http://dx.doi.org/10.1016/j.physletb.2014.08.004
0370-2693/
© 2014 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/3.0/). Funded by
SCOAP
3
.