Evaluation of the Single-Operation Alpha Counter

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Description

The single-operation alpha counter, designed primarily for counting low-level alpha samples prepared by plating activity onto metal cylinders, was evaluated as a possible replacement for the parallel-plate counters now used to count activity plated on disks. Each cylinder is closed at one end, so that all activity plated on it is on an outside surface which faces the sensitive volume of the chamber, and the total activity of the plate can be determined by a single count. Each side of the disk must be counted separately in the parallel-plate counter, and the edge may be counted twice. Results from about ... continued below

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8

Creation Information

Curtis, M. L. & Paige, M. K. December 8, 1952.

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Description

The single-operation alpha counter, designed primarily for counting low-level alpha samples prepared by plating activity onto metal cylinders, was evaluated as a possible replacement for the parallel-plate counters now used to count activity plated on disks. Each cylinder is closed at one end, so that all activity plated on it is on an outside surface which faces the sensitive volume of the chamber, and the total activity of the plate can be determined by a single count. Each side of the disk must be counted separately in the parallel-plate counter, and the edge may be counted twice. Results from about 300 cylinders and 300 disks ranging in activity from 0 to 80 counts per minute were compared. The single-operation counter was found to be capable of giving results at least as good as those obtained with the parallel-plate counter and in half the counting time. The following changes were suggested in the final model of the instrument: (1) redesign of the chamber for more effective decontamination, (2) design of a tool to be used for inserting and removing cylinders, (3) addition of a pressure gauge to the chamber, and (4) an improvement in the method of sealing the chamber to speed operaton and insure a better seal.

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8

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  • Report No.: MLM-800
  • Grant Number: AT-33-1-GEN-53
  • Office of Scientific & Technical Information Report Number: 969003
  • Archival Resource Key: ark:/67531/metadc925731

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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Creation Date

  • December 8, 1952

Added to The UNT Digital Library

  • Nov. 13, 2016, 7:26 p.m.

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  • Feb. 17, 2017, 4:01 p.m.

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Curtis, M. L. & Paige, M. K. Evaluation of the Single-Operation Alpha Counter, report, December 8, 1952; Miamisburg, Ohio. (digital.library.unt.edu/ark:/67531/metadc925731/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.