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A precise measurement of the 117mSn half-life
T Domingo1, K Starosta1, A Chester1
1Simon Fraser University, Burnaby, BC, Canada, V5A 1S6.
Summary
Researchers precisely measured the half-life of the tin-117m (117mSn) isotope using advanced gamma-ray spectroscopy. The new measurement provides a more accurate understanding of this important nuclear property.
Area of Science:
- Nuclear Physics
- Radiochemistry
Background:
- The tin-117m (117mSn) isotope is relevant in nuclear applications.
- Accurate half-life measurements are crucial for nuclear data libraries.
Purpose of the Study:
- To precisely determine the half-life of the 117mSn isotope.
- To measure the gamma-ray intensity ratio I(158.6keV)/I(156.0keV) for 117mSn.
Main Methods:
- Fast neutron activation of natural tin using 14.1 MeV neutrons.
- Time-resolved gamma-ray spectroscopy with a background-shielded HPGe detector.
- Utilized a CAMAC-based analogue data acquisition (DAQ) system, replacing a commercial one, and verified its deadtime response.
Main Results:
- The half-life of 117mSn was measured to be 13.91 ± 0.03 days.
- The gamma-ray intensity ratio I(158.6keV)/I(156.0keV) was determined to be 43.6 ± 1.5.
Conclusions:
- The study provides a highly accurate half-life value for 117mSn.
- The improved measurement contributes to more reliable nuclear data.
- The methodology demonstrates the effectiveness of the upgraded DAQ system for precise nuclear spectroscopy.
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