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.

  • Letter
  • Published:

Scintillation Spectrometer Studies on the Decay Schemes of Silver-110, Antimony-124 and Iodine-131

Abstract

IN order to study the decay schemes of radio-isotopes, we have used two scintillation spectrometers in coincidence. The construction of the spectrometers used and the measuring technique have been described earlier1. The pulses from one of the spectrometers are analysed by a single-channel pulse analyser. Pulses corresponding to a certain energy-range are selected by the channel, and the output pulses from the analyser are fed to the sweep-trigger of an oscilloscope. The pulses from the second spectrometer are led to the vertical deflexion plates of the oscilloscope. Only pulses which are in coincidence with those selected by the pulse analyser then appear on the screen. The coincidence-rate is 10–100 pulses per minute. The screen is photographed for a few hours. A picture of the pulse–height distribution is then obtained on the photographic plate; the density at a particular point is a measure of the number of pulses with the corresponding height. The density is determined by means of a microphotometer, and, from the known density curve of the plate, one obtains the pulse–height distribution curve. With the pulse analyser one thus selects pulses corresponding to a certain beta- or gamma-ray energy, and from the shape of the coincidence spectrum obtained one can infer what gamma-rays are in coincidence with the selected radiation.

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

Access options

Buy this article

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

Similar content being viewed by others

References

  1. Johansson, S. A. E., Nature, 165, 396 (1950); Arkiv för Fysik, 2, 171 (1950); 3, 533 (1951).

    Article  ADS  Google Scholar 

  2. Siegbahn, K., Phys. Rev., 77, 233 (1950).

    Article  ADS  CAS  Google Scholar 

  3. Kern, B. D., Zaffarano, D. J., and Mitchell, A. C. G., Phys. Rev., 73, 1142 (1948).

    Article  ADS  CAS  Google Scholar 

  4. Metzger, F., and Deutsch, M., Phys. Rev., 74, 1640 (1948).

    Article  ADS  CAS  Google Scholar 

  5. Bell, P. R., Cassidy, J. M., and Kelley, G. G., Phys. Rev., 82, 103 (1951).

    Article  ADS  CAS  Google Scholar 

  6. Ketelle, B. H., Zeldes, H., Brosi, A. R., and Dandl, R. A., Phys. Rev., 84, 585 (1951).

    Article  ADS  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

ALMQVIST, S., JOHANSSON, S. Scintillation Spectrometer Studies on the Decay Schemes of Silver-110, Antimony-124 and Iodine-131. Nature 170, 583–584 (1952). https://doi.org/10.1038/170583b0

Download citation

  • Issue date:

  • DOI: https://doi.org/10.1038/170583b0

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