2019 Impact factor 2.176
Hadrons and Nuclei
Eur. Phys. J. A 3, 311-312

Short note

Gamma-spectroscopy of the 199At nucleus with the Recoil Filter Detector

W. Meczynski1 - P. Bednarczyk1 - R. Chapman2 - S. Courtin3 - J. Grebosz1 - F. Hannachi4 - P. Jones5 - J. Kownacki6 - M. Lach1 - A. Lopez-Martens3 - K.H. Maier7 - J.C. Merdinger3 - D. Middleton2 - M. Palacz6 - M.B. Smith2 - K.M. Spohr2 - N. Schulz3 - M. Zieblinski1 - J. Styczen1

1 The Niewodniczanski Institute of Nuclear Physics, Kraków, Poland
2 University of Paisley, Paisley, Scotland, U.K.
3 Institut de Recherches Subatomiques, Strasbourg, France
4 Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, Orsay, France
5 University of Jyväskylä, Jyväskylä, Finland
6 Heavy Ion Laboratory, University of Warsaw,Warszawa, Poland
7 Hahn-Meitner-Institut, Berlin, Germany

Received: 17 September 1998 / Revised version: 14 October 1998 Communicated by B. Herskind

Abstract
The neutron deficient 199At nucleus has been studied in the 175Lu+28Si reaction at $\rm E_b = 141$ MeV. In order to select events of interest in the presence of the very strong background caused by fission, $\gamma$-rays have been detected in coincidence with recoiling evaporation residues. The excited states of 199At observed for the first time may indicate that this nucleus is deformed.

PACS
23.20.Lv Gamma transitions and level energies - 27.80.+w $190 \le A \le 219$ - 29.40.Ym Other detectors ×


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