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. Academic Article uri icon

abstract

  • 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.

published proceedings

  • Phys Rev Lett

author list (cited authors)

  • Eronen, T., Elomaa, V., Hager, U., Hakala, J., Jokinen, A., Kankainen, A., ... Kolhinen, V. S.

citation count

  • 58

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

publication date

  • December 2006