Kaplan, A.Tel, E.Aydin, E. G.Aydin, A.Yilmaz, M.2020-06-252020-06-252009closedAccess0969-8043https://doi.org/10.1016/j.apradiso.2008.12.014https://hdl.handle.net/20.500.12587/4466In this study, neutron-emission spectra produced by (pxn) reactions for some spallation neutron target nuclei such as (65)Cu, (204.206.207.208)Pb, (209)Bi, (232)Th and (238)U have been calculated by a proton beam up to 140 MeV. Multiple pre-equilibrium mean free path constants from internal transition for (204,208)Pb (p, xn) neutron emission spectra have been investigated. In the calculations, pre-equilibrium effects were calculated by using new evaluated hybrid model and geometry dependent hybrid model, full exciton model and cascade exciton model. The reaction equilibrium component was calculated by Weisskopf-Evving model. The obtained results have been discussed and compared with the available experimental data and found agreement with each other. (C) 2009 Elsevier Ltd. All rights reserved.eninfo:eu-repo/semantics/closedAccessAccelerator-driven systemSpallation neutron targetProton acceleratorEquilibrium reactionsPre-equilibrium reactionsArticle67457057610.1016/j.apradiso.2008.12.0142-s2.0-5994908932119186065Q2WOS:000264305500014Q2