F. Naqvi,1, 2 M. G´orska,2 L. C´aceres,2, 3 A. Jungclaus,3 M. Pf¨utzner,4 H. Grawe,2 F. Nowacki,5 K. Sieja,5 S. Pietri,2
P.H Regan,6 D. Rudolf,7 Z. Podoly´ak,6 J. Jolie,1 K. Andgren,8 T. Beck,2 B. Bednarczyk,2, 9 J. Benlliure,10
G. Benzoni,11 A.M Bruce,12 E. Casarejos,10 B. Cederwall,8 F. Crespi,11 P. Detistov,13 Zs. Dombr´adi,14
P. Doornenbal,2 H. Geissel,2 J. Gerl,2 J. Grebosz,2, 9 B. Hadinia,8 M. Hellstr¨om,7 R. Hoischen,2, 7
G. Ilie,1 A. Khaplanov,8 I. Kojouharov,2 M. Kmiecik,9 R. Kumar,15 N. Kurz,2 S. Lalkovski,12, 13 A. Maj,9
S. Mandal,16 V. Modamio,3 F. Montes,2 S. Myalski,9 W. Prokopowicz,2 P. Reiter,1 H. Schaffner,2
G. Simpson,17 D. Sohler,14 S.J Steer,6 S. Tashenov,2 J. Walker,3 O. Wieland,11 and H.J Wollersheim2
1Institut f¨ur Kernphysik, Universit¨at zu K¨oln, D-50937 K¨oln, Germany
2Helmholtzzentrum f¨ur Schwerionenforschung(GSI), D-64291 Darmstadt, Germany
3Departmento de fisica Te´orica, Universidad Aut´onoma de Madrid, E-28049 Madrid, Spain
4IEP, Warsaw University, PL-00681 Warsaw, Poland
5IPHC, IN2P3-CNRS/Universit´e Louis Pasteur,F-67037,Strasbourg,France
6Department of Physics, University of Surrey, Guildford, Gu2 7XH, UK
7Department of Physics, Lund University, S-22100 Lund, Sweden
8KTH Stockholm,S-10691 Stockholm, Sweden
9The Henryk Niewodnicza´nski Institute of Nuclear Physics, PL-31342 Krak´ow, Poland
10Universidad de Santiago de Compostela, E-175706 Santiago de Campostela, Spain
11INFN, Universitadegli Studi di Milano and INFN Sezione di Milano, I-20133 Milano, Italy
12School of Enigineering, University of Brighton, Brighton, Bn2 4GJ, UK
13Faculty of Physics, University of Sofia, Bg-1164, Sofia, Bulgaria
14Institute National Polytechnique de Grenoble, F-98026 Grenoble Cedex, France
15Inter University Accelerator Centre, New Delhi, India
16University of Delhi,New Delhi, India
17Institut Laue-Langevin, F-38042 Grenoble, France
The isomeric decays in 127Cd and 125Cd having two proton holes and three and five neutron
holes respectively in the doubly magic 132Sn core have been studied. To date even mass heavy Cd
isotopes have been investigated in details [1, 2]. The obtained sytematics exhibits evolution of single
particle energies and addresses the onset of deformation when removing particles from the core
nucleus. The experiment was performed at GSI, Darmstadt to investigate the structure of excited
states in odd mass neutron rich Cd isotopes. Isomeric decays of the nuclei were observed in the
fragmentation reaction of 136Xe beam at energy 750MeV/u on a 9Be target of 4g/cm2 thickness. The
Cd ions were selected using standard B½-¢E-B½ method in the FRagment Separator (FRS). Event
by event identification of the particles in terms of their A(mass) and Z(charge) was provided by
the standard FRS detectors. Isomers populated in the reaction were implanted in a plastic catcher
surrounded by 15 Ge cluster detectors from RISING array [4] to detect the ° decays. In 127Cd ,excited
states with pure ne