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Title: Measurement of Activation Reaction Rate Distributions in a Lead Assembly Bombarded with 500-MeV Protons

Abstract

Reaction rate distributions of various activation detectors such as the {sup nat}Ni(n,x){sup 58}Co, {sup 197}Au(n,2n){sup 196}Au, and {sup 197}Au(n,4n){sup 194}Au reactions were measured to study the production and the transport of spallation neutrons in a lead assembly bombarded with protons of 500 MeV. The measured data were analyzed with the nucleon-meson transport code NMTC/JAERI combined with the MCNP4A code using the nuclide production cross sections based on the JENDL Dosimetry File and those calculated with the ALICE-F code. It was found that the NMTC/JAERI-MCNP4A calculations agreed well with the experiments for the low-energy-threshold reaction of {sup nat}Ni(n,x){sup 58}Co. With the increase of threshold energy, however, the calculation underestimated the experiments, especially above 20 MeV. The reason for the disagreement can be attributed to the underestimation of the neutron yield in the tens of mega-electron-volt regions by the NMTC/JAERI code.

Authors:
; ; ; ;  [1]
  1. Japan Atomic Energy Research Institute (Japan)
Publication Date:
OSTI Identifier:
20804632
Resource Type:
Journal Article
Journal Name:
Nuclear Science and Engineering
Additional Journal Information:
Journal Volume: 135; Journal Issue: 1; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0029-5639
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ACTIVATION DETECTORS; COBALT 58; CROSS SECTIONS; DISTRIBUTION; DOSIMETRY; ELECTRONS; GOLD 194; GOLD 196; GOLD 197; GOLD 197 TARGET; LEAD; MEV RANGE; N CODES; NEUTRONS; NUCLEAR REACTION KINETICS; NUCLEAR REACTION YIELD; PROTON REACTIONS; PROTONS; THRESHOLD ENERGY

Citation Formats

Takada, Hiroshi, Meigo, Shin-ichro, Sasa, Toshinobu, Tsujimoto, Kazufumi, and Yasuda, Hideshi. Measurement of Activation Reaction Rate Distributions in a Lead Assembly Bombarded with 500-MeV Protons. United States: N. p., 2000. Web.
Takada, Hiroshi, Meigo, Shin-ichro, Sasa, Toshinobu, Tsujimoto, Kazufumi, & Yasuda, Hideshi. Measurement of Activation Reaction Rate Distributions in a Lead Assembly Bombarded with 500-MeV Protons. United States.
Takada, Hiroshi, Meigo, Shin-ichro, Sasa, Toshinobu, Tsujimoto, Kazufumi, and Yasuda, Hideshi. Mon . "Measurement of Activation Reaction Rate Distributions in a Lead Assembly Bombarded with 500-MeV Protons". United States.
@article{osti_20804632,
title = {Measurement of Activation Reaction Rate Distributions in a Lead Assembly Bombarded with 500-MeV Protons},
author = {Takada, Hiroshi and Meigo, Shin-ichro and Sasa, Toshinobu and Tsujimoto, Kazufumi and Yasuda, Hideshi},
abstractNote = {Reaction rate distributions of various activation detectors such as the {sup nat}Ni(n,x){sup 58}Co, {sup 197}Au(n,2n){sup 196}Au, and {sup 197}Au(n,4n){sup 194}Au reactions were measured to study the production and the transport of spallation neutrons in a lead assembly bombarded with protons of 500 MeV. The measured data were analyzed with the nucleon-meson transport code NMTC/JAERI combined with the MCNP4A code using the nuclide production cross sections based on the JENDL Dosimetry File and those calculated with the ALICE-F code. It was found that the NMTC/JAERI-MCNP4A calculations agreed well with the experiments for the low-energy-threshold reaction of {sup nat}Ni(n,x){sup 58}Co. With the increase of threshold energy, however, the calculation underestimated the experiments, especially above 20 MeV. The reason for the disagreement can be attributed to the underestimation of the neutron yield in the tens of mega-electron-volt regions by the NMTC/JAERI code.},
doi = {},
journal = {Nuclear Science and Engineering},
issn = {0029-5639},
number = 1,
volume = 135,
place = {United States},
year = {2000},
month = {5}
}