Precise half-life measurement of the superallowed beta(+) emitter Ca-38 Academic Article uri icon


  • The half-life of 38Ca, a TZ=-1 superallowed 0 +0++ emitter, has been measured to be 443.77(36) ms. In our experiment, pure sources of 38Ca were produced and the decay positrons were detected in a high-efficiency 4 proportional gas counter. Since the + decay of 38Ca feeds 38Km, which is itself a superallowed + emitter, the data were analyzed as a linked parent-daughter decay. Our result, with a precision of 0.08%, is a factor of 5 improvement on the best previous result. 2011 American Physical Society.

published proceedings


author list (cited authors)

  • Park, H. I., Hardy, J. C., Iacob, V. E., Banu, A., Chen, L., Golovko, V. V., ... Tribble, R. E.

citation count

  • 20

complete list of authors

  • Park, HI||Hardy, JC||Iacob, VE||Banu, A||Chen, L||Golovko, VV||Goodwin, J||Horvat, V||Nica, N||Simmons, E||Trache, L||Tribble, RE

publication date

  • December 2011