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Gamma-spectroscopy of the 199At nucleus with the Recoil Filter Detector |
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| Authors: | W. Męczyński P. Bednarczyk R. Chapman S. Courtin J. Grębosz F. Hannachi P. Jones J. Kownacki M. Lach A. Lopez-Martens K.H. Maier J.C. Merdinger D. Middleton M. Palacz M.B. Smith K.M. Spohr N. Schulz M. Ziębliński J. Styczeń |
| Affiliation: | The Niewodniczański Institute of Nuclear Physics, Kraków, Poland, PL University of Paisley, Paisley, Scotland, U.K., GB Institut de Recherches Subatomiques, Strasbourg, France, FR Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, Orsay, France, FR University of Jyv?skyl?, Jyv?skyl?, Finland, FI Heavy Ion Laboratory, University of Warsaw, Warszawa, Poland, PL Hahn-Meitner-Institut, Berlin, Germany, DE |
| Abstract: | The neutron deficient 199At nucleus has been studied in the 175Lu+28Si reaction at Eb= 141 MeV. In order to select events of interest in the presence of the very strong background caused by fission, γ-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. Received: 17 September 1998 / Revised version: 14 October 1998 |
| Keywords: | PACS:23.20.Lv Gamma transitions and level energies – 27.80.+w 190 ≤ A ≤ 219 – 29.40.Ym Other detectors |
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