Difference between the triton beta decay constants in atomic and molecular tritium measured by the helium isotope method

  • Akulov Y
  • Mamyrin B
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Abstract

The results are given for an experiment on measuring the difference between the values of triton beta decay constant in atomic and molecular tritium, Δλam=λa-λm. In order to determine Δλam, the growth rates of the relative content of radiogenic helium-3 in samples with atomic and molecular tritium have been compared. The value of Δλam=(4.6±0.8) ×10-12 s-1 has been obtained, which corresponds to a relative change of the decay constant by ∼0.26%. Using the value of Δλam measured, the following value of the half-life of atomic tritium has been derived: (T1/2)a=(12.264±0. 018) years. © 2004 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Atomic tritium
  • Beta decay
  • Decay constant chemical shift
  • Molecular tritium

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Authors

  • Yu A. Akulov

  • B. A. Mamyrin

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