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Title: Study of {sup 27}Al(n,x{gamma}) reactions up to a neutron energy of 400 MeV

The prompt {gamma}-radiation from the interaction of fast neutrons with Al was measured using the white neutron beam of the WNR facility at the Los Alamos National Laboratory. Partial production cross sections for residual nuclei in the range from F to Al were measured from threshold up to 400 MeV by observing the most intense {gamma}-transitions between low lying levels of these nuclei. Two-dimensional neutron time-of-flight versus gamma pulse height spectra from the interaction of the neutrons with Al were observed after flight-paths of about 20 and 40 m with a high-purity Ge-detector. The neutron cross sections for prominent {gamma}-transitions in a large number of residual nuclei could be derived with typical uncertainties of 10--20% up to a neutron energy of 400 MeV. The energy resolution varies from {approx}0.2 MeV at 10 MeV to {approx}50 MeV at 400 MeV. In the low energy range (up to 60 MeV) the results are compared with nuclear model calculations using the code GNASH. A very good overall agreement is obtained without special adjustment of parameters.
Authors:
; ;  [1] ; ; ; ;  [2]
  1. Wien Univ. (Austria). Inst., fuer Radiumforschung und Kernphysik
  2. Los Alamos National Lab., NM (United States)
Publication Date:
OSTI Identifier:
10156284
Report Number(s):
LA-UR--94-1582; CONF-940507--13
ON: DE94012893; TRN: 94:012103
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: International conference on nuclear data for science and technology: nuclear data for the twenty-first century,Gatlinburg, TN (United States),9-13 May 1994; Other Information: PBD: [1994]
Research Org:
Los Alamos National Lab., NM (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ALUMINIUM 27 TARGET; NEUTRON REACTIONS; PROMPT GAMMA RADIATION; PHOTOPRODUCTION; CROSS SECTIONS; ENERGY DEPENDENCE 663430; 663530; 663220; NUCLEON-INDUCED REACTIONS AND SCATTERING; A = 20-38; ELECTROMAGNETIC TRANSITIONS