The isotope decays to in a single step

PHYSICS · Single correct · A Level · Physics · Particles and radiation · Particles and radiation

Problem

The isotope

^{37}_{19}\text{K}

decays to

^{37}_{18}\text{Ar}

in a single step. Which of the following sets of emitted particles is required for the decay equation to obey all conservation laws? (a)

\beta^{+}+\bar{\nu}_e

(b)

\beta^{+}+\nu_e

(c)

\beta^{-}+\bar{\nu}_e

(d)

\beta^{+}

only