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Evaluation the decay data of (153)Gd.

Huang Xiaolong1

  • 1China Institute of Atomic Energy, P.O. Box 275(41), Beijing 102413, China.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
|October 6, 2009
PubMed
Summary

This study presents an updated decay scheme for Gadolinium-153 (Gd) using electron capture. Key findings include a refined half-life of 239.47 days and a recommended gamma-ray emission probability for improved nuclear data.

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Area of Science:

  • Nuclear Physics
  • Radiochemistry
  • Atomic and Molecular Physics

Background:

  • Gadolinium-153 (Gd) undergoes electron capture decay, populating excited states in Europium-153 (Eu).
  • Accurate decay data is crucial for various applications, including medical imaging and nuclear structure studies.
  • Previous evaluations of (153)Gd decay data may not incorporate the latest experimental measurements.

Purpose of the Study:

  • To provide a comprehensive and updated evaluation of the (153)Gd decay scheme.
  • To incorporate recent experimental measurements into the decay data analysis.
  • To establish precise values for the half-life and gamma-ray emission probabilities of (153)Gd.

Main Methods:

  • Application of the Limitation of Relative Statistical Weight (LRSW) method for averaging experimental data.
  • Rigorous examination of all known measured gamma-ray relative emission probabilities.
  • Calculation of internal conversion coefficients and decay intensity balance using the ENSDF analysis program.

Main Results:

  • The half-life of (153)Gd is determined to be 239.47 ± 0.07 days.
  • The gamma-ray emission probability for the 97.431 keV reference line is recommended as 29.5 ± 0.5%.
  • A complete decay intensity balance was achieved, and the (153)Gd decay scheme was re-built based on the evaluated data.

Conclusions:

  • The updated decay scheme and data for (153)Gd provide a more accurate representation of its radioactive decay.
  • The refined nuclear data, particularly the half-life and gamma-ray probabilities, enhance the reliability of applications utilizing (153)Gd.
  • This work establishes a robust foundation for future nuclear structure investigations involving (153)Gd and its daughter nucleus (153)Eu.