The decay of 34Ar: A mirror comparison of superallowed -decay Academic Article uri icon


  • The decay of 34Ar has been studied in experiments that employed a gas-transport system to reduce background activities. Through observation of the spectrum of -delayed -rays, the half-life of 34Ar was determined to be 844.53.4 ms with (94.44+0.23-0.26)% of the -decays proceeding by the superallowed branch; four other decay branches were observed and their intensities measured. The ft value of 304617 s for 34Ar is compared with the best current value for 34Cl to yield a mirror asymmetry of = (-0.20.6)%. This result is now consistent with the calculated effects of charge-dependent mixing and lends confidence to those calculations. The final corrected ft values for 34Cl and 34Ar are in complete agreement with the other accurately known results for 14O and 26mAl, and between them these results yield a credible value for the vector coupling constant of nuclear -decay. 1974.

published proceedings

  • Nuclear Physics A

author list (cited authors)

  • Hardy, J. C., Schmeing, H., Geiger, J. S., & Graham, R. L.

citation count

  • 22

complete list of authors

  • Hardy, JC||Schmeing, H||Geiger, JS||Graham, RL

publication date

  • April 1974