We present an analytical expression for the shape factor for the $\beta$ decay of ${}_{}{}^{12}{}_{}{}^{}\mathrm{B}$ with the Coulomb corrections to order $\alpha \mathrm{ZR}{W}_0$, including the correction through the induced weak magnetism term and examine effects of this induced Coulomb correction.

[RADIOACTIVITY ${}_{}{}^{12}{}_{}{}^{}\mathrm{B}$; calculated $\sigma \left(E_e\right)$, Coulomb corrections.]

• Received 7 January 1974

DOI:https://doi.org/10.1103/PhysRevC.9.2052