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Half-life determination of 77Kr using the reference source method.

Zeng Jun1, Gong Youjin1, Guo Xiaofeng1

  • 1Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900, China.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine
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PubMed
Summary
This summary is machine-generated.

Researchers precisely measured the half-life of Krypton-77 (Kr-77) using advanced detectors. The new half-life value of 71.25 minutes challenges previously accepted data, suggesting potential bias in older studies.

Keywords:
(77)KrGamma ray spectrometryHPGeHalf-lifeReference source method

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Area of Science:

  • Nuclear Physics
  • Atomic and Molecular Physics

Background:

  • Accurate half-life measurements are crucial for nuclear structure studies and applications.
  • Previous half-life data for Krypton-77 (Kr-77) may be outdated or inaccurate.

Purpose of the Study:

  • To precisely determine the half-life of Kr-77.
  • To re-evaluate existing Kr-77 half-life data.

Main Methods:

  • Kr-77 samples were produced via an (n, 2n) reaction using a DT accelerator.
  • Radioactive decay was monitored using three High-Purity Germanium (HPGe) detectors.
  • Measurements were conducted over 600 minutes with data recorded at regular intervals.

Main Results:

  • The determined half-life of Kr-77 is 71.25 (42) minutes.
  • This new value suggests potential bias in previously reported values from the 1970s.
  • The recommended value in the Evaluated Nuclear Structure Data File (ENSDF) may also require revision.

Conclusions:

  • The study provides a more accurate half-life for Kr-77.
  • This finding necessitates a re-examination of existing nuclear data for Kr-77.
  • Improved half-life data will enhance nuclear structure models and applications.