University of Hertfordshire

From the same journal

By the same authors

  • G. G. Kiss
  • T. Szuecs
  • Gy. Gyuerky
  • Zs. Fueloep
  • J. Farkas
  • Zs. Kertesz
  • E. Somorjai
  • M. Laubenstein
  • C. Froehlich
  • T. Rauscher
View graph of relations
Original languageEnglish
Number of pages14
Pages (from-to)52-65
JournalNuclear Physics A
Journal publication date1 Oct 2011
Volume867
Issue1
DOIs
Publication statusPublished - 1 Oct 2011

Abstract

For an improved modeling of the astrophysical nucleosynthesis of p-nuclei, low energy cross section data of alpha-induced reactions on heavy isotopes are needed. Technical difficulties hamper the experimental determination of these cross sections, therefore the relevant experimental data are almost completely missing. Here we present a new method for the cross section measurements, the activation technique based on the detection of characteristic X-ray radiation. The feasibility of the method is illustrated through the measurement of the Tm-169(alpha, gamma)Lu-173 and Tm-169(alpha, n)Lu-172 reaction cross sections. 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 between E-c.m. = 13.16 and 17.08 MeV. The Tm-169(alpha, n)Lu-172 reaction cross section was derived from close above the threshold up to E-c.m.. = 17.08 MeV. Details of the new method and the experimental results are presented. (C) 2011 Elsevier B.V. All rights reserved.

ID: 1614383