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Phys. Rev. Lett. 99, 192501 (2007) [4 pages]

Two-Proton Correlations in the Decay of 45Fe

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K. Miernik1, W. Dominik1, Z. Janas1, M. Pfützner1, L. Grigorenko2, C. R. Bingham3, H. Czyrkowski1, M. Ćwiok1, I. G. Darby3, R. Dąbrowski1, T. Ginter4, R. Grzywacz3,5, M. Karny1, A. Korgul1, W. Kuśmierz1, S. N. Liddick3, M. Rajabali3, K. Rykaczewski5, and A. Stolz4
1Institute of Experimental Physics, Warsaw University, 00-681 Warsaw, Poland
2Joint Institute for Nuclear Research, 141980, Dubna, Moscow Region, Russia
3Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37996, USA
4National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
5Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA

Received 17 July 2007; published 5 November 2007

The decay of extremely neutron-deficient 45Fe has been studied in detail by means of a novel type of a gaseous detector employing digital imaging to record tracks of charged particles. The two-proton radioactivity channel was clearly identified. For the first time, the angular and energy correlations between two protons emitted from the nuclear ground state were determined, indicating the genuine three-body character of this decay. The half-life of 45Fe was found to be 2.6±0.2  ms and the observed 2p decay branching ratio is 70±4%.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.192501
DOI:
10.1103/PhysRevLett.99.192501
PACS:
23.50.+z, 27.40.+z, 29.40.Cs, 29.40.Gx
 
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