2018 Impact factor 2.481
Hadrons and Nuclei
Eur. Phys. J. A 6, 289-302

Gamma-ray spectroscopy of 192-195Po

K. Helariutta1 - J.F.C. Cocks1 - T. Enqvist1 - P.T. Greenlees1 - P. Jones1 - R. Julin1 - S. Juutinen1 - P. Jämsen1 - H. Kankaanpää1 - H. Kettunen1 - P. Kuusiniemi1 - M. Leino1 - M. Muikku1 - M. Piiparinen1 - P. Rahkila1 - A. Savelius1 - W.H. Trzaska1 - S. Törmänen1 - J. Uusitalo1 - R.G. Allatt2 - P.A. Butler2 - R.D. Page2 - M. Kapusta3

1 Accelerator Laboratory, Department of Physics, University of Jyväskylä, 40351 Jyväskylä, Finland
2 Department of Physics, Oliver Lodge Laboratory, University of Liverpool, Liverpool L69 7ZE, UK
3 Department of Nuclear Electronics, Soltan Institute for Nuclear Studies, 05-400 Otwock-Swierk, Poland

Received: 5 July 1999 / Revised version: 7 September 1999 Communicated by J. Äystö

Abstract
Prompt and delayed $\gamma$-rays have been observed from very neutron deficient 192-195Po nuclei by using the recoil-decay tagging (RDT) and recoil gating techniques. The yrast levels up to the (10+) state in the 192Po were identified for the first time. Comprehensive data for 194Po rendered it possible to extend the yrast line and to observe several positive and negative parity non-yrast states. In the odd-mass isotopes 193Po and 195Po, favoured and unfavoured states on top of the 13/2+ state have been identified. The results are discussed within the simple vibrator and rotor pictures as well as in the framework of coexisting spherical and deformed-intruder structures.

PACS
27.80.+w $190 \le A \le 219$ - 23.20.Lv Gamma transitions and level energies - 21.60.Ev Collective models - 25.70.-z Low and intermediate energy heavy-ion reactions


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