Masses of the radioactive isotopes 62Ga, 62Zn and 62Cu have been measured at the JYFLTRAP facility with a relative precision of better than 18 ppb. A Q_EC value of (9181.07 +- 0.54) keV for the superallowed decay of 62Ga is obtained from the measured cyclotron frequency ratios of 62Ga-62Zn, 62Ga-62Ni and 62Zn-62Ni ions. The resulting Ft-value supports the validity of the conserved vector current hypothesis (CVC). The mass excess values measured were (-51986.5 +-1.0) keV for 62Ga, (-61167.9 +- 0.9) keV for 62Zn and (-62787.2 +- 0.9) keV for 62Cu.
@article{arxiv.nucl-ex/0512010,
title = {Q-value of the superallowed beta decay of Ga-62},
author = {T. Eronen and V. Elomaa and U. Hager and J. Hakala and A. Jokinen and I. Moore and H. Penttila and S. Rahaman and S. Rinta-Antila and A. Saastamoinen and T. Sonoda and J. Aysto and A. Bey and B. Blank and G. Canchel and C. Dossat and J. Giovinazzo and I. Matea and N. Adimi},
journal= {arXiv preprint arXiv:nucl-ex/0512010},
year = {2009}
}
Comments
12 pages, 3 figures, 2 tables, submitted to Phys. Lett. B. v2: added acknowledgements