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Sum-coincidence technique forγ-ray studies

  • S. Jha
  • H. G. Devare
  • M. Narayana Rao
  • Kumari G. C. Pramila
Article
  • 24 Downloads

Summary

If a radioactive source emitting cascadeγ-rays is placed between two well-matched NaI crystal and multiplier units and pulses from the two units are added electronically, one would get, in the added spectrum, a peak corresponding to the sum of the energies of the cascadeγ-rays. If the pulses in one of the units are analysed in coincidence with the final sum peak, one would get only the photo-peaks of the cascadeγ-rays. This “sum-coincidence” technique has been applied to the study of theγ-rays of Sc46, Sm153 and Eu154. In Eu154 decay, the cascade emission of 320 Kev., 1280 Kev. and 123 Kev.γ-rays has been established; and it has been shown that there is a level in Gd154 at 1850 Kev. which is fed byβ -emission from Eu154 to the extent of about 3%.

Keywords

Radioactive Source Decay Scheme Pulse Height Analyser Eu154 Gd154 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Indian Academy of Sciences 1959

Authors and Affiliations

  • S. Jha
    • 1
  • H. G. Devare
    • 1
  • M. Narayana Rao
    • 1
  • Kumari G. C. Pramila
    • 1
  1. 1.Tata Institute of Fundamental ResearchBombay

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