GROUNDING OF BETA SOURCES BY AN AUXILIARY ALPHA SOURCE

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A Po/sup 210/ source was used to furnish a reliab1e ground for both electron and positron sources. This was done to prevent the electron and positron sources from charging during BETA spectral studies in magnetic lens spectrometers. An approximately 20- mu c Po/sup 210/ source was placed 1.2 in. behind a 4- mu c Na/sup 2 / 2>s positron emitter backed by 20- mu g/cm/sup 2/ Formvar in the spectrometer; this arrangement resulted in a charging rate decrease of approximately 80%. When the source was placed 0.5 in. away, no charging was detectable over a period of more than one ... continued below

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Pages: 1358

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Nichols, R.T. & Jensen, E.N. December 1, 1960.

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Description

A Po/sup 210/ source was used to furnish a reliab1e ground for both electron and positron sources. This was done to prevent the electron and positron sources from charging during BETA spectral studies in magnetic lens spectrometers. An approximately 20- mu c Po/sup 210/ source was placed 1.2 in. behind a 4- mu c Na/sup 2 / 2>s positron emitter backed by 20- mu g/cm/sup 2/ Formvar in the spectrometer; this arrangement resulted in a charging rate decrease of approximately 80%. When the source was placed 0.5 in. away, no charging was detectable over a period of more than one week. The discharge is attributed mainly to the loss of electrons from the source and backing caused by ionization of alpha particles since few alpha particles are stopped near the source. (B.O.G.)

Physical Description

Pages: 1358

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  • Journal Name: Rev. Sci. Instr.; Journal Volume: Vol: 31; Journal Issue: 12

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  • Report No.: IS-183
  • Grant Number: None
  • DOI: 10.1063/1.1716899 | External Link
  • Office of Scientific & Technical Information Report Number: 4100648
  • Archival Resource Key: ark:/67531/metadc866968

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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 1, 1960

Added to The UNT Digital Library

  • Sept. 16, 2016, 12:32 a.m.

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  • Oct. 26, 2017, 6:59 p.m.

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Nichols, R.T. & Jensen, E.N. GROUNDING OF BETA SOURCES BY AN AUXILIARY ALPHA SOURCE, article, December 1, 1960; Ames, Iowa. (digital.library.unt.edu/ark:/67531/metadc866968/: accessed November 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.