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Phys. Rev. Lett. 96, 012502 (2006) [4 pages]

Fine Structure of the Gamow-Teller Resonance in 90Nb and Level Density of 1+ States

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Y. Kalmykov1, T. Adachi2, G. P. A. Berg3, H. Fujita2,4,5, K. Fujita3, Y. Fujita2, K. Hatanaka3, J. Kamiya3, K. Nakanishi3, P. von Neumann-Cosel1,*, V. Yu. Ponomarev1,†, A. Richter1, N. Sakamoto3, Y. Sakemi3, A. Shevchenko1, Y. Shimbara2, Y. Shimizu3, F. D. Smit5, T. Wakasa3, J. Wambach1, and M. Yosoi6
1Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
2Department of Physics, Osaka University, Toyonaka, Osaka 560-0043, Japan
3Research Center for Nuclear Physics, Osaka University, Ibaraki, Osaka 567-0047, Japan
4School of Physics, University of the Witwatersrand, Johannesburg 2050, South Africa
5iThemba LABS, P.O. Box 722, Somerset West 7129, South Africa
6Department of Physics, Kyoto University, Kyoto 606-8502, Japan

Received 30 May 2005; published 6 January 2006

The fine structure of the Gamow-Teller resonance in a medium-heavy nucleus is observed for the first time in a high-resolution 90Zr(3He,t)90Nb experiment at the Research Center for Nuclear Physics, Osaka. Using a novel wavelet analysis technique, it is possible to extract characteristic energy scales and to quantify their relative importance for the generation of the fine structure. This method combined with the selectivity of the reaction permits an extraction of the level density of 1+ states in 90Nb.

© 2006 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.96.012502
DOI:
10.1103/PhysRevLett.96.012502
PACS:
24.30.Cz, 21.10.Ma, 25.55.Kr, 27.60.+j

*Electronic address: vnc@ikp.tu-darmstadt.de

†Permanent address: BLTP, JINR, Dubna, Russia.

 
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