Photoactivation of Ta-180(m) and s-process nucleosynthesis of nature's rarest naturally occuring isotope

Authors
von Neumann-Cosel, P Arlandini, C Belic, D Besserer, J de Boer, J Carroll, JJ Enders, J Hartmann, T Kappeler, F Kaiser, H Kneissl, U Loewe, M Maier, HJ Maser, H Mohr, P Nord, A Pitz, HH Richter, A Schumann, M Volz, S Zilges, A
Citation
P. Von Neumann-cosel et al., Photoactivation of Ta-180(m) and s-process nucleosynthesis of nature's rarest naturally occuring isotope, NUCL PHYS A, 688(1-2), 2001, pp. 237C-240C
Citations number
21
Categorie Soggetti
Physics
Journal title
NUCLEAR PHYSICS A
ISSN journal
03759474 → ACNP
Volume
688
Issue
1-2
Year of publication
2001
Pages
237C - 240C
Database
ISI
SICI code
0375-9474(20010521)688:1-2<237C:POTASN>2.0.ZU;2-3
Abstract
The depopulation of the quasistable isomer (J(pi) = 9(-), E-x = 75 keV) in Ta-180 through resonant photoabsorption was studied with intense bremsstrah lung. The results show evidence for a deexciting level with an energy of 1. 085 MeV or below, leading to a dramatic acceleration of the isomer decay to the short-lived J(pi) = 1(+) ground state under stellar s-process conditio ns. Consequences for a possible nucleosynthesis of nature's rarest isotope Ta-180 within the s process are discussed.