Accession Number:

AD0627000

Title:

CHARACTERISTICS OF K40 DISTRIBUTED SOURCES IN WATER,

Descriptive Note:

Corporate Author:

NAVAL RADIOLOGICAL DEFENSE LAB SAN FRANCISCO CALIF

Personal Author(s):

Report Date:

1965-11-23

Pagination or Media Count:

23.0

Abstract:

Measurements on K40 gamma rays from a distributed source in water are reported. The data are presented in terms of the pulse height spectra and count rates observed as the size of the source was increased from a small pool surrounding the detector to an infinite distributed source and then the infinite source was viewed through increasing thicknesses of water. This work was accomplished by using solutions of a potassium salt in graduated spherical balloons which encompassed the detector and were themselves completely surrounded by fresh water. The report characterizes the predominantly low-energy pulse pulse height spectra observed from sources in water using large crystal detectors, particularly when the source is separated from the detector and emphasizes the need for consideration of this spectra when designing pressure vessels for underwater detection systems requiring maximum sensitivity. A count rate build-up factor was calculated for the increasing thickness of absorber and compared to calculated values for doserate build-up factors at the same primary energy. Author

Subject Categories:

  • Nuclear Instrumentation
  • Radioactivity, Radioactive Wastes and Fission Products

Distribution Statement:

APPROVED FOR PUBLIC RELEASE