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Study of the 243Am decay.

B Caro Marroyo1, A Martín Sánchez2, M Jurado Vargas2

  • 1Department of Physics, University of Extremadura, 06006 Badajoz, Spain; Laboratorio de Metrología de Radiaciones Ionizantes, CIEMAT, Avenida Complutense, 40, 28040 Madrid, Spain.

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|November 7, 2017
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Summary

This study revises gamma-ray emission probabilities for Americium-243 (243Am) using alpha-gamma coincidence measurements. New data were obtained for previously unassigned or unconfirmed gamma transitions, improving nuclear decay data accuracy.

Keywords:
(243)Am decayAlpha-gamma coincidence measurementsGamma spectrometryGamma transitionsNuclear data values

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Area of Science:

  • Nuclear Physics
  • Radiochemistry
  • Atomic and Molecular Physics

Background:

  • Previous evaluations of gamma-ray emission probabilities for 243Am, published in 1996, did not include three newly identified gamma transitions.
  • The Decay Data Evaluation Project's last evaluation omitted the emission probabilities for the 46.84 and 102.02 keV transitions.
  • Accurate nuclear decay data are crucial for various applications, including nuclear medicine and environmental monitoring.

Purpose of the Study:

  • To re-evaluate and confirm the gamma-ray emission probabilities for specific transitions of 243Am.
  • To include the emission probabilities of the 46.84 and 102.02 keV gamma transitions in the nuclear decay data.
  • To investigate the emission characteristics of other gamma transitions in 243Am decay.

Main Methods:

  • Utilizing alpha-gamma coincidence measurements to precisely determine gamma-ray emission probabilities.
  • Employing advanced spectroscopic techniques to analyze the decay of 243Am.
  • Comparing experimental results with existing nuclear data evaluations.

Main Results:

  • Revised emission probabilities for the 46.84 and 102.02 keV gamma transitions were determined.
  • The study investigated the emissions of additional gamma transitions, including 31.13, 43.53, 74.66, 86.71, and 141.89 keV.
  • Experimental data provide a more comprehensive dataset for 243Am decay.

Conclusions:

  • The alpha-gamma coincidence measurements successfully revised and confirmed gamma-ray emission probabilities for 243Am.
  • The updated data enhance the accuracy of nuclear decay information for 243Am.
  • This research contributes to the refinement of nuclear databases for scientific and practical applications.