Study of Proton Induced Reactions in a Radioactive 129-I Target at Ep=660 MeV

V. S. Pronskikh , J. Adam , A. R. Balabekyan , V. S. Barashenkov , V. P. Dzhelepov , S. A. Gustov , V. P. Filinova , V. G. Kalinnikov

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M. I. Krivopustov I. V. Mirokhin A. A. Solnyshkin V. I. Stegailov V. M. Tsoupko-Sitnikov J. Mrazek R. Brandt W. Westmeier R. Odoj S. G. Mashnik A. J. Sierk R. E. Prael K. K. Gudima M. I. Baznat

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classification ⚛️ nucl-ex astro-phnucl-th

keywords cem2kgeminicodesdresnerlaqgsmfissionfragmentationgem2

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Two NaI (85% 129-I and 15% 127-I) targets were exposed to a beam of 660-MeV protons. Cross sections for formation of 76 residual nuclei were obtained by the induced activity method. The results are compared with other experimental data on 127-I and theoretical calculations by eleven models contained in the codes LAHET3 (using the Bertini+Dresner, ISABEL+Dresner, INCL+Dresner, and INCL+ABLA options), CASCADE, CEM95, CEM2K, LAQGSM+GEM2, CEM2k+GEM2, LAQGSM+GEMINI, and CEM2k+GEMINI. Most of the models describe spallation products with masses close to the target reasonably well while the reliability of the codes differs greatly in the deep spallation and fission/fragmentation regions. The difficulties in describing products with A=40-80 by all of the codes tested here except for CEM2k+GEMINI and LAQGSM+GEMINI is related to the neglect of fission (and fragmentation) processes for targets as light as 129-I.

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Study of Proton Induced Reactions in a Radioactive 129-I Target at Ep=660 MeV

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