First-forbidden mirror β-decays in A=17 mass region

Abstract The first-forbidden β -decay of 17 Ne into the ‘halo’ state J π =1/2 1 + of 17 F presents one of the largest measured asymmetries for mirror β -decay feeding bound final states. This asymmetry is studied in the framework of the Shell Model Embedded in the Continuum (SMEC). The spatial extent of single particle orbits is constrained by the proton capture cross-section 16 O( p , γ ) 17 F calculated in SMEC. This allows to estimate mirror symmetry breaking in 17 F/ 17 O and 17 Ne/ 17 N nuclei.