Determining reaction cross sections via characteristic X-ray detection: alpha-induced reactions on Tm-169 for the astrophysical gamma-process

G. G. Kiss, T. Rauscher, T. Szuecs, Zs. Kertesz, Zs. Fueloep, Gy. Gyuerky, C. Froehlich, J. Farkas, Z. Elekes, E. Somorjai

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Abstract

The cross sections of the Tm-169(alpha, gamma)Lu-173 and Tm-169(alpha,n)Lu-172 reactions have been measured first time using a new method, by detecting the characteristic X-ray radiation following the electron capture-decay of Lu-172,Lu-173. Despite the relatively long half-life of the reaction products (T-1/2 = 500 and 6.7 days, respectively) it was possible to measure the cross section of the Tm-169(alpha, gamma)Lu-173 reaction close to the Gamow window (T-9 = 3.5 GK), between E-c.m. = 13.16 and 17.08 MeV. The Tm-169(alpha,n)Lu-172 reaction cross section was measured from E-c.m. = 11.21 MeV up to E-c.m. =17.08 MeV. The experimental results have been compared to theoretical predictions. (C) 2010 Elsevier B.V. All rights reserved.

Original languageEnglish
Pages (from-to)419-423
Number of pages5
JournalPhysical Letters B
Volume695
Issue number5
DOIs
Publication statusPublished - 17 Jan 2011

Keywords

  • MODEL
  • Nuclear astrophysics
  • Characteristic X-ray emission
  • NUCLEOSYNTHESIS
  • REACTION-RATES
  • P-PROCESS
  • Statistical model
  • Astrophysical gamma-process
  • Nucleosynthesis

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