skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: ZEUS Activation Foils Report for Experiments 1-5

Abstract

The ZEUS experiments were conducted using the COMET vertical assembly machine at the Los Alamos Critical Experiments Facility (LACEF) at the Los Alamos National Laboratory (LANL). The experiments were designed to check the adequacy of cross sections in the intermediate-energy range. For the first four experiments, 12 kg highly enriched uranium (HEU) layers were sandwiched between different numbers of graphite plates in a vertical stack. In the first four experiments, a unit cell consisted of n graphite plates, an HEU layer, and then another n graphite plates. The unit cells were stacked until criticality was obtained. Experiments 1, 2, 3, and 4 contained decreasing amounts of graphite, where the unit cells value n was 4, 3, 2 and 1 respectively. In experiment 5 the HEU plates were in direct contact with each other to evaluate cross sections in the fast-energy range. A detailed description of experiments 1-4 is provided in reference, and of experiment 5, in reference. In order to investigate the cross sections in more detail, some ZEUS runs were made with activation foils inside the assemblies. Ratios of the activations of various foils are a standard method of measuring the gross neutron spectrum shape. A more detailed spectrummore » can be determined by simultaneously unfolding the response of several foils. This report describes the unfolding of the ZEUS activation foils data. The focus in this analysis is on the fast-energy range, especially at > 5 MeV.« less

Authors:
 [1];  [1];  [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1493007
Report Number(s):
LA-UR-19-20453
DOE Contract Number:  
89233218CNA000001
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
activation foils

Citation Formats

Moss, Calvin Elroy, Bounds, John Alan, and Jaegers, Peter James. ZEUS Activation Foils Report for Experiments 1-5. United States: N. p., 2019. Web. doi:10.2172/1493007.
Moss, Calvin Elroy, Bounds, John Alan, & Jaegers, Peter James. ZEUS Activation Foils Report for Experiments 1-5. United States. doi:10.2172/1493007.
Moss, Calvin Elroy, Bounds, John Alan, and Jaegers, Peter James. Tue . "ZEUS Activation Foils Report for Experiments 1-5". United States. doi:10.2172/1493007. https://www.osti.gov/servlets/purl/1493007.
@article{osti_1493007,
title = {ZEUS Activation Foils Report for Experiments 1-5},
author = {Moss, Calvin Elroy and Bounds, John Alan and Jaegers, Peter James},
abstractNote = {The ZEUS experiments were conducted using the COMET vertical assembly machine at the Los Alamos Critical Experiments Facility (LACEF) at the Los Alamos National Laboratory (LANL). The experiments were designed to check the adequacy of cross sections in the intermediate-energy range. For the first four experiments, 12 kg highly enriched uranium (HEU) layers were sandwiched between different numbers of graphite plates in a vertical stack. In the first four experiments, a unit cell consisted of n graphite plates, an HEU layer, and then another n graphite plates. The unit cells were stacked until criticality was obtained. Experiments 1, 2, 3, and 4 contained decreasing amounts of graphite, where the unit cells value n was 4, 3, 2 and 1 respectively. In experiment 5 the HEU plates were in direct contact with each other to evaluate cross sections in the fast-energy range. A detailed description of experiments 1-4 is provided in reference, and of experiment 5, in reference. In order to investigate the cross sections in more detail, some ZEUS runs were made with activation foils inside the assemblies. Ratios of the activations of various foils are a standard method of measuring the gross neutron spectrum shape. A more detailed spectrum can be determined by simultaneously unfolding the response of several foils. This report describes the unfolding of the ZEUS activation foils data. The focus in this analysis is on the fast-energy range, especially at > 5 MeV.},
doi = {10.2172/1493007},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {1}
}

Technical Report:

Save / Share: