Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

  • Article
  • Published:

Unidentified Excess Alpha-Activity in the 4.4-Mev Region in Natural Thorium Samples

Nature volume 202, pages 639–641 (1964)Cite this article

This is a preview of subscription content, access via your institution

Access options

Buy this article

  • Purchase on SpringerLink
  • Instant access to the full article PDF.

USD 39.95

Prices may be subject to local taxes which are calculated during checkout

References

  1. Cherdyntsev, V. V., and Mikhailov, V. F., Geochemistry, No. 1, 1 (English translation; 1963).

  2. Cherdyntsev, V. V., Isabayev, A. A., Syrkov, Yu. A., Orlov, D. P., and Usatov, E. S., Geokhimiya, No. 4, 373 (1960).

  3. Cherdyntsev, V. V., Orlov, D. P., Isabayev, E. A., and Ivanov, V. I., Geokhimiya, No. 10, 840 (1961).

  4. Richardson, K. A., Ph.D. thesis, Rice University (1963).

  5. Adams, J. A. S., Oak Ridge Tech. Inform. Extension Serv., Paper No. TID-18456, February (1963).

  6. Perlman, I., and Rasmussen, J. O., in Handbuch der Physik., edit. by Flugge, S., 42 (Springer-Verlag, 1957).

    Google Scholar 

  7. Hanna, G. C., in Experimental Nuclear Physics, edit. by Segre, E., 3 (John Wiley and Sons, 1959).

    Google Scholar 

  8. Wetherill, G. W., and Libby, W. F., J. Geophys. Res., 67, 3609 (1962).

    Google Scholar 

  9. Fields, P., Friedman, A. M., Lemer, J., Metta, D., and Sjoblon, R., Phys. Rev., 131, 1249 (1963).

    Article  ADS  CAS  Google Scholar 

  10. Foreman, B. M., and Seaborg, G. T., J. Inorg. and Nuclear Chem., 7, 305 (1958).

    Article  CAS  Google Scholar 

  11. Diamond, H., and Barnes, R. F., Phys. Rev., 101, 1064 (1956).

    Article  ADS  CAS  Google Scholar 

  12. Rankama, K., Progress in Isotope Geology, 565 (Pergamon Press, 1963).

    Google Scholar 

Download references

Author information

Author notes

  1. R. D. CHERRY: On leave from Department of Physics, University of Cape Town, South Africa, 1962–63.

Authors and Affiliations

  1. Department of Geology, Rice University, Houston, Texas

    R. D. CHERRY,  K. A. RICHARDSON &  J. A. S. ADAMS

Authors
  1. R. D. CHERRY
    View author publications

    Search author on:PubMed Google Scholar

  2. K. A. RICHARDSON
    View author publications

    Search author on:PubMed Google Scholar

  3. J. A. S. ADAMS
    View author publications

    Search author on:PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

CHERRY, R., RICHARDSON, K. & ADAMS, J. Unidentified Excess Alpha-Activity in the 4.4-Mev Region in Natural Thorium Samples. Nature 202, 639–641 (1964). https://doi.org/10.1038/202639a0

Download citation

  • Issue date:

  • DOI: https://doi.org/10.1038/202639a0

This article is cited by

Search

Advanced search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing