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Title: Retrospective neutron spectrum determination of a (30 MeV D, Be) source using the multi-foil activation technique and STAYSL-PNNL [Characterization of neutron spectra from a (30 MeV d, Be) source using the multi-foil activation technique]

Journal Article · · Journal of Radioanalytical and Nuclear Chemistry
 [1];  [2];  [2];  [2];  [2];  [1]
  1. Univ. of Maryland, College Park, MD (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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Retrospective characterization of a (30 MeV D, Be) neutron source was performed employing multi-foil activation and STAYSL-PNNL. Experimental reaction rates were calculated from gamma spectroscopy measurements of irradiated foils and MCNP provided the guess spectrum. Adjusted spectra were evaluated through activation calculations for a stainless-steel target using FISPACT-II. Adjusted spectra showed limited dependence on the dosimetry reactions and provided minor improvements in activation calculations. Omitting reflected neutrons in the guess spectrum generated poor activation results and the limited number of dosimetry reactions introduced doubt in the adjusted spectra. Furthermore, a dedicated neutron spectrometry experiment and a more detailed simulation is required.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1476860
Report Number(s):
LLNL-JRNL-749383; 934355
Journal Information:
Journal of Radioanalytical and Nuclear Chemistry, Vol. 318, Issue 1; ISSN 0236-5731
Publisher:
SpringerCopyright Statement
Country of Publication:
United States
Language:
English

References (7)

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Evaluation of the neutron energy spectrum, angular distribution, and yield of the 9 Be( d , n ) reaction with a thick beryllium target journal May 2013
Neutron spectrum determination of d(20)+Be source reaction by the dosimetry foils method journal November 2017
Neutron spectrometry—historical review and present status journal January 2002
Characterization of a Thermo Scientific D711 D-T neutron generator located in a low-scatter facility
  • Hayes, John W.; Finn, Erin; Greenwood, Larry
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journal March 2014
Thick-foils activation technique for neutron spectrum unfolding with the MINUIT routine—Comparison with GEANT4 simulations
  • Vagena, E.; Theodorou, K.; Stoulos, S.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 887 https://doi.org/10.1016/j.nima.2018.01.025
journal April 2018
A new neutron energy spectrum unfolding code using a two steps genetic algorithm
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  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 811 https://doi.org/10.1016/j.nima.2015.12.028
journal March 2016

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Related Subjects

42 ENGINEERING
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
43 PARTICLE ACCELERATORS
STAYSL-PNNL
Neutron spectral adjustment
Foil activation
d+Be neutron source
MCNP
FISPACT-II