On the measurement of cosmogenic nuclides in cometary materials

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Determinations of the cosmogenic nuclide concentrations in cometary material will help to define the recent surface history of the comet and its exposure to cosmic rays. In particular, the rates for the removal or mixing of surface material could be studied, and any variations in cosmic-ray intensity implied by the data could be used to infer orbital changes during the last few million years. The measurement of the shorter-lived isotopes poses technical challenges that should be addressed now. The measurement of longer-lived isotopes will be straightforward provided that rates of mass loss are not too high. 46 refs., 2 figs.

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Pages: 15

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Herzog, G.F.; Englert, P.A.J.; Reedy, R.C.; Nishiizumi, K.; Kohl, C.P. & Arnold, J.R. January 1, 1989.

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Description

Determinations of the cosmogenic nuclide concentrations in cometary material will help to define the recent surface history of the comet and its exposure to cosmic rays. In particular, the rates for the removal or mixing of surface material could be studied, and any variations in cosmic-ray intensity implied by the data could be used to infer orbital changes during the last few million years. The measurement of the shorter-lived isotopes poses technical challenges that should be addressed now. The measurement of longer-lived isotopes will be straightforward provided that rates of mass loss are not too high. 46 refs., 2 figs.

Physical Description

Pages: 15

Notes

NTIS, PC A03/MF A01 - OSTI; 1.

Source

  • Workshop on the analysis of returned comet nucleus samples, Milpitas, CA, USA, 16 Jan 1989

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  • Other: DE89009248
  • Report No.: LA-UR-89-1110
  • Report No.: CONF-890195-1
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 6458531
  • Archival Resource Key: ark:/67531/metadc1204238

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  • January 1, 1989

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  • July 5, 2018, 11:11 p.m.

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  • Oct. 23, 2018, 12:06 p.m.

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Herzog, G.F.; Englert, P.A.J.; Reedy, R.C.; Nishiizumi, K.; Kohl, C.P. & Arnold, J.R. On the measurement of cosmogenic nuclides in cometary materials, article, January 1, 1989; United States. (digital.library.unt.edu/ark:/67531/metadc1204238/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.