Abstract
The uncertainty in the variations of the ft values in the scheme J = 0/ sup +/ -- J = 0/sup +/ produced by the energydependent relativistic terms of the scalar nuclear matrix elements is shown to be insufficient to mask the presence of a Fierz term larger than the limit set by Gerhart. The calculation of the matrix element is made in the shell model with harmonic wave functions. From this, the ratio of ft values for O/sup 14/ and C/sup 34/ positron. decay is determined. To check whether the result is sensitive to the shape of the potential, the calculation is repeated using the Dirac wave function for a particle in a finite square well. The comparison of the ratios shows that the effect of the relativistic corrections to the ratio of the ft values is uncertain in the exact values; the magnitude is a fraction of one per cent. (T.B.A.)
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
