Q values of the superallowed beta emitters 26Alm, 42Sc, and 46V and their impact on Vud and the unitarity of the Cabibbo-Kobayashi-Maskawa matrix.
- Additional Document Info
- View All
The beta-decay Q(EC) values of the superallowed beta emitters 26Alm, 42Sc, and 46V have been measured with a Penning trap to a relative precision of better than 8 x 10(-9). Our result for 46V, 7052.72(31) keV, confirms a recent measurement that differed from the previously accepted reaction-based Q(EC) value. However, our results for 26Alm and 42Sc, 4232.83(13) keV and 6426.13(21) keV, are consistent with previous reaction-based values. By eliminating the possibility of a systematic difference between the two techniques, this result demonstrates that no significant shift in the deduced value of Vud should be anticipated.
author list (cited authors)
Eronen, T., Elomaa, V., Hager, U., Hakala, J., Jokinen, A., Kankainen, A., ... Kolhinen, V. S.
complete list of authors
Eronen, T||Elomaa, V||Hager, U||Hakala, J||Jokinen, A||Kankainen, A||Moore, I||Penttilä, H||Rahaman, S||Rissanen, J||Saastamoinen, A||Sonoda, T||Aystö, J||Hardy, JC||Kolhinen, VS