Cross section measurements of the 131Xe(p,n) reaction for production of the therapeutic radionuclide 131Cs

F. Tárkányi, A. Hermanne, S. Takács, R. A. Rebeles, P. Van den Winkel, B. Király, F. Ditrói, A. V. Ignatyuk

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131Cs is an X-ray emitter radioisotope gaining interest in prostate brachytherapy. It is generally produced via the 130Ba(n,γ)131Ba→131Cs process in thermal-flux reactors. Here we investigate its cyclotron production possibilities. Excitation function of the 131Xe(p,n)131Cs reaction was measured up to 35 MeV using the stacked gascell technique and high-resolution X-ray spectrometry. The experimental data were compared with results of the ALICE-IPPE and EMPIRE-II codes and curves taken from the PADF and TENDL database. The calculated integral yield was 17 MBq/μA h in the energy range Ep=20→7 MeV. Comparison of cyclotron and reactor production routes was given.

Original languageEnglish
Pages (from-to)1751-1757
Number of pages7
JournalApplied Radiation and Isotopes
Issue number10
Publication statusPublished - Oct 1 2009



  • Cross section
  • Cs therapeutic radionuclide
  • Excitation function
  • Proton induced reaction
  • Xe target

ASJC Scopus subject areas

  • Radiation

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