ISOMERIC DECAY STUDIES IN NEUTRON-RICH N ≈ 126 NUCLEI

Author:

STEER S. J.1,PODOLYÁK ZS.1,PIETRI S.1,GÓRSKA M.2,FARRELLY G. F.1,REGAN P. H.1,RUDOLPH D.3,GARNSWORTHY A. B.14,HOISCHEN R.3,GERL J.2,WOLLERSHEIM H. J.2,GRAWE H.2,MAIER K. H.56,BECKER F.2,BEDNARCZYK P.25,CÁCERES L.27,DOORNENBAL P.28,GEISSEL H.2,GRȨBOSZ J.25,KELIC A.2,KOJOUHAROV I.2,KURZ N.2,MONTES F.2,PROKOPOWICZ W.2,SAITO T.2,SCHAFFNER H.2,TASHENOV S.2,HEINZ A.4,KURTUKIAN-NIETO T.9,BENZONI G.10,PFÜTZNER M.11,JUNGCLAUS A.7,BALABANSKI D. L.12,BRANDAU C.1,BROWN A.131,BRUCE A. M.14,CATFORD W. N.1,CULLEN I. J.1,DOMBRÁDI ZS.15,ESTEVEZ M. E.16,GELLETLY W.1,ILIE G.8,JOLIE J.8,JONES G. A.1,KMIECIK M.5,KONDEV F. G.17,KRÜCKEN R.18,LALKOVSKI S.14,LIU Z.1,MAJ A.5,MYALSKI S.5,SCHWERTEL S.18,SHIZUMA T.1,WALKER P. M.1,WERNER-MALENTO E.2,WIELAND O.10

Affiliation:

1. Department of Physics, University of Surrey, Guildford, GU2 7XH, UK

2. GSI, Planckstrasse 1, D-64291, Darmstadt, Germany

3. Department of Physics, Lund University, S-22100, Lund, Sweden

4. WNSL, Yale University, 272 Whitney Avenue, New Haven, CT, 06520, USA

5. The Institute of Nuclear Physics, PL-31-342, Kraków, Poland

6. Department of Physics, University of the West of Scotland, Paisley, PA1 2BE, Scotland

7. Departmento de Fisica Teórica, Universidad Autonoma de Madrid, Madrid, Spain

8. IKP, Universität zu Köln, D-50937, Köln, Germany

9. Universidad de Santiago de Compostela, Santiago de Campostela, Spain

10. INFN, Università degli Studi di Milano, I-20133, Milano, Italy

11. IEP, Warsaw University, Hoża 69, PL-00-681, Poland

12. INRNE, Bulgarian Academy of Sciences, BG-1784 Sofia, Bulgaria

13. NSCL, Michigan State University, East Lansing, MI 48824-1321, USA

14. School of Environment and Technology, University of Brighton, Brighton, BN2 4GJ, UK

15. Institute for Nuclear Research, H-4001, Debrecen, Hungary

16. Instituto de Fisica Corpuscular, Valencia, Spain

17. Nuclear Engineering Division, Argonne National Laboratory, Argonne, IL-60439, USA

18. Physik Department E12, Technische Universität München, Garching, Germany

Abstract

Heavy neutron-rich nuclei were populated via relativistic energy fragmentation of a E / A = 1 GeV 208 Pb beam. The nuclei of interest were selected and identified by a fragment separator and then implanted in a passive plastic stopper. Delayed γ rays following internal isomeric decays were detected by the RISING array. Experimental information was obtained on a number of nuclei with Z = 73-80 ( Ta - Hg ), providing new information both on the prolate-oblate transitional region as well as on the N = 126 closed shell nuclei.

Publisher

World Scientific Pub Co Pte Lt

Subject

General Physics and Astronomy,Nuclear and High Energy Physics

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