PARTICLE DECAYS FROM B-12 AND N-12 MIRROR NUCLEI

Spin-isospin excitations in B-12 and N-12 have been studied using the C-12(d,He-2)B-12 and C-12(He-3,t)N-12 charge-exchange reactions at the ta = 0 degrees and at E-d=200 MeV and E(He-3)=450 MeV, respectively. N eutron decay from B-12 to B-11 and proton decay from N-12 to C-11 have been measured with detector arrays consisting of liquid-scintillation counters and silicon detectors, respectively. Microscopic structures of the spin-dipole resonances in B-12 and N-12 are discussed on the ba sis of the experimental observations of particle decays and their angu lar correlations.