RAINIER: A simulation tool for distributions of excited nuclear states and cascade fluctuations
Abstract
In this paper, a new code has been developed named RAINIER that simulates the γray decay of discrete and quasicontinuum nuclear levels for a userspecified range of energy, angular momentum, and parity including a realistic treatment of level spacing and transition width fluctuations. A similar program, DICEBOX, uses the Monte Carlo method to simulate level and width fluctuations but is restricted in its initial level population algorithm. On the other hand, modern reaction codes such as TALYS and EMPIRE populate a wide range of states in the residual nucleus prior to γray decay, but do not go beyond the use of deterministic functions and therefore neglect cascade fluctuations. This combination of capabilities allows RAINIER to be used to determine quasicontinuum properties through comparison with experimental data. Finally, several examples are given that demonstrate how cascade fluctuations influence experimental highresolution γray spectra from reactions that populate a wide range of initial states.
 Authors:

 Univ. of California, Berkeley, CA (United States). Nuclear Engineering
 Univ. of California, Berkeley, CA (United States). Nuclear Engineering; Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
 Publication Date:
 Research Org.:
 Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
 Sponsoring Org.:
 USDOE National Nuclear Security Administration (NNSA)
 OSTI Identifier:
 1423543
 Grant/Contract Number:
 NA0002135
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
 Additional Journal Information:
 Journal Volume: 892; Journal ID: ISSN 01689002
 Publisher:
 Elsevier
 Country of Publication:
 United States
 Language:
 English
 Subject:
 97 MATHEMATICS AND COMPUTING; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; simulation; Monte Carlo; gamma cascade; reaction; initial distribution
Citation Formats
Kirsch, L. E., and Bernstein, L. A. RAINIER: A simulation tool for distributions of excited nuclear states and cascade fluctuations. United States: N. p., 2018.
Web. doi:10.1016/j.nima.2018.02.096.
Kirsch, L. E., & Bernstein, L. A. RAINIER: A simulation tool for distributions of excited nuclear states and cascade fluctuations. United States. https://doi.org/10.1016/j.nima.2018.02.096
Kirsch, L. E., and Bernstein, L. A. Sun .
"RAINIER: A simulation tool for distributions of excited nuclear states and cascade fluctuations". United States. https://doi.org/10.1016/j.nima.2018.02.096. https://www.osti.gov/servlets/purl/1423543.
@article{osti_1423543,
title = {RAINIER: A simulation tool for distributions of excited nuclear states and cascade fluctuations},
author = {Kirsch, L. E. and Bernstein, L. A.},
abstractNote = {In this paper, a new code has been developed named RAINIER that simulates the γray decay of discrete and quasicontinuum nuclear levels for a userspecified range of energy, angular momentum, and parity including a realistic treatment of level spacing and transition width fluctuations. A similar program, DICEBOX, uses the Monte Carlo method to simulate level and width fluctuations but is restricted in its initial level population algorithm. On the other hand, modern reaction codes such as TALYS and EMPIRE populate a wide range of states in the residual nucleus prior to γray decay, but do not go beyond the use of deterministic functions and therefore neglect cascade fluctuations. This combination of capabilities allows RAINIER to be used to determine quasicontinuum properties through comparison with experimental data. Finally, several examples are given that demonstrate how cascade fluctuations influence experimental highresolution γray spectra from reactions that populate a wide range of initial states.},
doi = {10.1016/j.nima.2018.02.096},
journal = {Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment},
number = ,
volume = 892,
place = {United States},
year = {2018},
month = {3}
}
Figures / Tables:
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