Monsanto Chemical Company, Unit 3 abstracts of progress reports, August 16--31, 1945: Summary of work to date on volatile neutron source Metadata

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  • Main Title Monsanto Chemical Company, Unit 3 abstracts of progress reports, August 16--31, 1945: Summary of work to date on volatile neutron source


  • Author: Rollinson, C.L.
    Creator Type: Personal


  • Sponsor: United States. Department of Energy.
    Contributor Type: Organization
    Contributor Info: USDOE, Washington, DC (United States)


  • Name: Monsanto Chemical Co., Dayton, OH (United States)
    Place of Publication: United States


  • Creation: 1945-09-06


  • English


  • Content Description: It was proposed to prepare a volatile polonium compound which could be used alone or with another gaseous compound as a neutron source. The objective was to obtain a neutron source which would give off few neutrons in the expanded state, but when condensed would act substantially as a thick target and emit perhaps ten times as many neutrons. Originally, polonium hexafluoride was suggested; with such compound the fluorine atoms would constitute the target. the predicted boiling point of polonium hexafluoride is about -40 {degrees}C. There was reason to believe, however, that lower relatively non-volatile fluorides would be formed rather than the hexafluoride. Polonium alkyls were therefore proposed as alternatives. The predicted boiling point of Po(CH{sub 3}){sub 2} is about 110 {degrees}C. This compound in itself would probably not be suitable as a target material but it could be mixed with other gases such as carbon tetrafluoride, boron trifluoride, etc., as targets. As a longer range possibility, Po(CF{sub 3}){sub 2} was also suggested. This compound would act as its own target and would moreover have the same F/Po ratio as PoF{sub 6}; its boiling point could be expected to be 30{degrees} - 60 {degrees} lower than that of polonium dimethyl. Calculations were made with showed that the desired effect could be obtained either with Po F{sub 6} or with a mixture of Po(CH{sub 3}){sub 2} with a suitable target gas. Investigation of the preparation of these two compounds was therefore undertaken, and later some preliminary attempts to prepare polonium carbonyl were made.
  • Physical Description: 10 p.


  • Keyword: Fluorides
  • Keyword: Density
  • Keyword: Polonium Compounds
  • Keyword: Materials Testing
  • STI Subject Categories: 07 Isotope And Radiation Source Technology
  • Keyword: Stability
  • STI Subject Categories: 66 Physics
  • Keyword: Tellurium
  • Keyword: Chemical Preparation
  • Keyword: Tellurides
  • Keyword: Volatile Matter
  • Keyword: Alpha Particles
  • Keyword: Neutron Sources


  • Other Information: DN: Declassified


  • Name: Office of Scientific & Technical Information Technical Reports
    Code: OSTI


  • Name: UNT Libraries Government Documents Department
    Code: UNTGD

Resource Type

  • Report


  • Text


  • Other: DE97003049
  • Report No.: MLM--1064
  • Grant Number: AC04-76DP00053
  • Office of Scientific & Technical Information Report Number: 443206
  • Archival Resource Key: ark:/67531/metadc677694


  • Display Note: OSTI as DE97003049