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Phys. Rev. Lett. 90, 012502 (2003) [4 pages]

Fine Structure in Proton Emission from 145Tm Discovered with Digital Signal Processing

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M. Karny1,2, R. K. Grzywacz1,3, J. C. Batchelder4, C. R. Bingham2,3, C. J. Gross3,5, K. Hagino6, J. H. Hamilton7, Z. Janas1,8, W. D. Kulp9, J. W. McConnell3,8, M. Momayezi10, A. Piechaczek11, K. P. Rykaczewski1,3, P. A. Semmes12, M. N. Tantawy2, J. A. Winger13, C. H. Yu3, and E. F. Zganjar11
1IFD, Warsaw University, Pl-00681 Warsaw, Hoża 69, Poland
2University of Tennessee, Knoxville, Tennessee 37996
3Physics Division, ORNL, Oak Ridge, Tennessee 37830
4UNIRIB, Oak Ridge Associated Universities, Oak Ridge, Tennessee 37831
5Oak Ridge Institute for Science and Education, Oak Ridge, Tennessee 37831
6Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan
7Department of Physics, Vanderbilt University, Nashville, Tennessee 37235
8Joint Institute for Heavy Ion Research, Oak Ridge, Tennessee 37831
9Department of Physics, Georgia Institute of Technology, Atlanta, Georgia 30332
10X-Ray Instrumentation Associates, Newark, California 94560
11Department of Physics, Lousiana State University, Baton Rouge, Louisiana 70803
12Department of Physics, Tennessee Technological University, Cookeville, Tennessee 38505
13Department of Physics, Mississippi State University, Mississippi State, Mississippi 39762

Received 29 July 2002; published 7 January 2003

Fine structure in proton emission from the 3.1(3)  μs activity of 145Tm was discovered by using a novel technique of digital processing of overlapping recoil implantation and decay signals. Proton transitions to the ground state of 144Er and to its first excited 2+ state at 0.33(1) MeV with a branching ratio Ip(2+)=9.6±1.5% were observed. The structure of the 145Tm wave function and the emission process were analyzed by using particle-core vibration coupling models.

© 2003 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.012502
DOI:
10.1103/PhysRevLett.90.012502
PACS:
23.50.+z, 21.10.Pc, 21.10.Tg, 27.60.+j
 
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