$Q$-value of the superallowed $\beta$ decay of 62Ga

T. Eronen , V. Elomaa , U. Hager , J. Hakala , A. Jokinen , I. Moore , H. Penttila , S. M. Wahidur Rahaman , S. Rinta-Antila , A. Saastamoinen , T. Sonoda , J. Aysto , A. Bey (1) , Bertram Blank (1) , G. Canchel (1) , C. Dossat (1) , J. Giovinazzo (1) , I. Matea (1) , N. Adimi

1 CENBG - Centre d'Etudes Nucléaires de Bordeaux Gradignan

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.

Mots clés: Penning trap; Atomic mass; Q-value; Ft value

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

T. Eronen, V. Elomaa, U. Hager, J. Hakala, A. Jokinen, et al.. $Q$-value of the superallowed $\beta$ decay of 62Ga. Physics Letters B, 2006, 636, pp.191-196. ⟨10.1016/j.physletb.2006.03.062⟩. ⟨in2p3-00079539⟩