Final Report for NA-22/DTRA Cosmic Ray Project

Technical Report · Tue Jul 21 00:00:00 EDT 2015

DOI:https://doi.org/10.2172/1240952· OSTI ID:1240952

Wurtz, Ron E. ^[1]; Chapline, George F. ^[1]; Glenn, Andrew M. ^[1]; Nakae, Les F. ^[1]; Pawelczak, Iwona A. ^[1]; Sheets, Steven A. ^[1]

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1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

The primary objective of this project was to better understand the time-correlations between the muons and neutrons produced as a result of high energy primary cosmic ray particles hitting the atmosphere, and investigate whether these time correlations might be useful in connection with the detection of special nuclear materials. During the course of this project we did observe weak correlations between secondary cosmic ray muons and cosmic ray induced fast neutrons. We also observed strong correlations between tertiary neutrons produced in a Pb pile by secondary cosmic rays and minimum ionizing particles produced in association with the tertiary neutrons.

• Research Organization: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC52-07NA27344
• OSTI ID: 1240952
• Report Number(s): LLNL-TR-674938
• Country of Publication: United States
• Language: English

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