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Nuclei have spin- and isospin-degrees of freedom. Therefore, Gamow-Teller (GT) transitions caused by the  στ  operator (spin-isospin operator) are unique tools for the studies of nuclear structure as well as nuclear interactions. They can be studied in  β  decays as well as charge-exchange (CE) reactions. Similarly,  M 1  γ  decays are mainly caused by the  στ  operator. Combined studies of these transitions caused by Weak, Strong, and Electro-Magnetic interactions provide us a deeper understanding of nuclear spin-isospin-type transitions. We first compare the strengths of analogous GT and  M 1 transitions in the  A  = 27,  T z   = ±½ mirror nuclei  27 Al and  27 Si. The comparison is extended to the  T z   = ±1, 0 nuclei. The strength of GT transition from the ground state (g.s.) of  42 Ca to the 0.611 MeV first  J π   = 1 +  state in  42 Sc is compared with that of the analogous  M 1 transition from the 0.611 MeV state to the  T  = 1, 0 +  g.s. (isobaric analog state: IAS) in  42 Sc. The 0.611 MeV state has the property of Low-energy Super GT (LeSGT) state, because it carries the main part of the GT strength of all available transitions from the g.s. of  42 Ca (and  42 Ti) to the  J π   = 1 +  GT states in  42 Sc.

Analogous Gamow-Teller and M1 Transitions in Tz = ±½ Mirror Nuclei and in Tz = ±1, 0 Triplet Nuclei relevant to Low-energy Super GT state