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Coincidence summing between X-rays and conversion electrons in 137Cs.

M Korun1, P Maver Modec

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We measured coincidence summing probability for barium-137 decay. Electron detection probability decreases with material, reaching ~0.6 without any absorber.

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Area of Science:

  • Nuclear Physics
  • Atomic Physics

Background:

  • Barium-137 (137Ba) decay involves emission of conversion electrons and X-rays.
  • Coincidence summing can affect nuclear decay measurements.

Purpose of the Study:

  • To measure the coincidence summing probability between conversion electrons and X-rays from the 137Ba decay.
  • To investigate the effect of intervening material on electron detection.

Main Methods:

  • Measurements were performed in close geometry.
  • The amount of material between the source and detector was varied.

Main Results:

  • The probability of detecting a conversion electron decreased exponentially with increasing material thickness.
  • In the absence of any material, the electron registration probability within the detector's solid angle was approximately 0.6.

Conclusions:

  • The presence of material significantly attenuates conversion electron detection.
  • Understanding these effects is crucial for accurate nuclear decay spectroscopy.