Journal Article

PreJuSER-55031

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Charged particle evaporation and pre-equilibrium emission in 1.2eV proton-induced spallation reactions

Herbach, C. M. ; Filges, D.FZJ* ; Galin, J. ; Goldenbaum, F.FZJ* ; Hilscher, D. ; Jahnke, U. ; Letourneau, A. ; Peghaire, A. ; Pienkowski, L. ; Schröder, U. ; Tishchenko, V. ; Toke, J.

2006
North-Holland Publ. Co. Amsterdam

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Please use a persistent id in citations: doi:10.1016/j.nuclphysa.2005.10.014

Abstract: Absolute cross sections, energy spectra, and angular distributions have been measured for H-1,H-2,H-3, He-3,He-4,He-6, Li-6,Li-7,Li-8,Li-9 and Be-7,Be-9,Be-10 isotopes produced in 1.2 GeV proton-induced spallation reactions with tar gets between Al and Th. Results Of Simulation calculations with the intra-nuclear cascade code INCL2.0 coupled to the statistical model GEMINI are in good agreement with these data, as to charged-particle evaporation, mean excitation energy, and mean linear momentum transfer. The pre-equilibriLlin emission of composite particles, not accounted for in these simulations, however, typically contributes to the total Production Of composite particles by 40-60% for H-2 and He-3, 20-40% for H-3, 5-20% for He-4, and about 15-25% for Li and Be. The composite pre-equilibriurn particles together carry off a mean energy Of LIP to 50 MeV, i.e., about 30% compared to the inean energy released by particle evaporation. For deuterons, pre-equilibrium emission is shown to be well described by surface coalescence while definitely other mechanisms are required for He-4 and heavier clusters. (c) 2005 Elsevier B.V. All riahts reserved.

Keyword(s): p nucleus: nuclear reaction ; p: emission ; light nucleus: production ; light nucleus: energy spectrum ; angular distribution ; cross section: mass number ; nuclide: mass spectrum ; intranuclear cascade ; model: statistical ; experimental results ; Juelich COSY PS ; 1.2 GeV ; nuclear reactions Al, Ti, Fe, Ni, Cu, Zr, Ag, Ho, Ta, W, Au, Pb, Th(p, X), E=1.2 GeV (auto) ; measured light charged particles isotopic production sigma, sigma(E,theta) (auto) ; deduced role of pre-equilibrium emission, intra-nuclear cascade and statistical evaporation model analysis (auto)

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Institut 1 (Experimentelle Kernphysik I) (IKP-E-I)

Research Program(s):

1. Physik der Hadronen und Kerne (P53)

Appears in the scientific report 2006

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