The $Tz = −1→ Tz =0$ beta decays and comparison with Charge Exchange reactions Available to Purchase

Gamow‐Teller (GT) transitions can be studied in both β decay and charge exchange (CE) reactions. If isospin is a good quantum number, then the $Tz = −1→0$ and $Tz = +1→0$GT mirror transitions, are identical. Therefore, a comparison of the results from studies of β decay and CE should shed light on this assumption. Accordingly we have studied the β decay of the $Tz = −1$ fp‐shell nuclei, $54Ni,$ $50Fe,$ $46Cr,$ and $42Ti,$ produced in fragmentation and we have compared our results with the spectra from (⁠$3He,$ t) measurements on the mirror $Tz = +1$ target nuclei studied in high resolution at RCNP, Osaka. The β decay experiments were performed as part of the STOPPED beam RISING campaign at GSI.