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Title: Cosmic Ray induced Neutron and Gamma-Ray bursts in a Lead Pile

Abstract

The neutron background is created primarily by cosmic rays interactions. Of particular interest for SNM detection is an understanding of burst events that resemble fission chains. We have been studying the interaction of cosmic rays with a lead pile that is efficient at creating neutron bursts from cosmic ray interactions. The neutron burst size depends on the configuration of the lead. We have found that the largest bursts appear to have been created by primaries of energy over 100 GeV that have had a diffractive interaction with the atmosphere. The large events trigger muon coincidence paddles with very high efficiency, and the resulting interactions with the lead pile can create over 10, 000 neutrons in a burst.

Authors:
; ; ; ;
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
908901
Report Number(s):
UCRL-TR-230895
TRN: US0703795
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CHAINS; CONFIGURATION; DETECTION; EFFICIENCY; FISSION; MUONS; NEUTRONS

Citation Formats

Chapline, G, Hagmann, C, Kerr, P, Snyderman, N J, and Wurtz, R. Cosmic Ray induced Neutron and Gamma-Ray bursts in a Lead Pile. United States: N. p., 2007. Web. doi:10.2172/908901.
Chapline, G, Hagmann, C, Kerr, P, Snyderman, N J, & Wurtz, R. Cosmic Ray induced Neutron and Gamma-Ray bursts in a Lead Pile. United States. doi:10.2172/908901.
Chapline, G, Hagmann, C, Kerr, P, Snyderman, N J, and Wurtz, R. Tue . "Cosmic Ray induced Neutron and Gamma-Ray bursts in a Lead Pile". United States. doi:10.2172/908901. https://www.osti.gov/servlets/purl/908901.
@article{osti_908901,
title = {Cosmic Ray induced Neutron and Gamma-Ray bursts in a Lead Pile},
author = {Chapline, G and Hagmann, C and Kerr, P and Snyderman, N J and Wurtz, R},
abstractNote = {The neutron background is created primarily by cosmic rays interactions. Of particular interest for SNM detection is an understanding of burst events that resemble fission chains. We have been studying the interaction of cosmic rays with a lead pile that is efficient at creating neutron bursts from cosmic ray interactions. The neutron burst size depends on the configuration of the lead. We have found that the largest bursts appear to have been created by primaries of energy over 100 GeV that have had a diffractive interaction with the atmosphere. The large events trigger muon coincidence paddles with very high efficiency, and the resulting interactions with the lead pile can create over 10, 000 neutrons in a burst.},
doi = {10.2172/908901},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2007},
month = {5}
}

Technical Report:

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