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APS » Journals » Phys. Rev. Lett. » Volume 83 » Issue 25
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Phys. Rev. Lett. 83, 5242–5245 (1999)

Photoactivation of 180Tam and Its Implications for the Nucleosynthesis of Nature's Rarest Naturally Occurring Isotope

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D. Belic1, C. Arlandini2, J. Besserer3, J. de Boer3, J. J. Carroll4, J. Enders5, T. Hartmann5, F. Käppeler2, H. Kaiser5, U. Kneissl1, M. Loewe3, H. J. Maier3, H. Maser1, P. Mohr5, P. von Neumann-Cosel5, A. Nord1, H. H. Pitz1, A. Richter5,6, M. Schumann2, S. Volz5, and A. Zilges5
1Institut für Strahlenphysik, Universität Stuttgart, D-70569 Stuttgart, Germany
2Institut für Kernphysik, Forschungszentrum Karlsruhe, D-76021 Karlsruhe, Germany
3Sektion Physik, Universität München, D-85748 Garching, Germany
4Department of Physics and Astronomy, Youngstown State University, Youngstown, Ohio 44555
5Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
6Wissenschaftskolleg zu Berlin, D-14193 Berlin, Germany

Received 15 July 1999; published in the issue dated 20 December 1999

The depopulation of the quasistable isomer in 180Ta with Jπ = 9- at Ex = 75keV by resonant photoabsorption was investigated with intense bremsstrahlung. The results indicate a dramatic acceleration of the isomer decay to the short-lived Jπ = 1+ ground state under stellar s-process conditions. The consequences for a possible nucleosynthesis of nature's rarest isotope 180Ta within the s process are discussed.

© 1999 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.83.5242
DOI:
10.1103/PhysRevLett.83.5242
PACS:
25.20.Dc, 26.20.+f, 27.70.+q, 97.10.Cv
 
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