Effect of isoscalar spin-triplet pairings on spin-isospin responses in $sd-$ shell nuclei

Abstract

The spin magnetic dipole transitions and the neutron-proton spin-spin correlations in $sd-$shell even-even nuclei with $N=Z$ are investigated using shell model wave functions. The isoscalar spin-triplet pairing correlation provides a substantial quenching effect on the spin magnetic dipole transitions, especially the isovector (IV) ones. Consequently, an enhanced isoscalar spin-triplet pairing interaction influences the proton-neutron spin-spin correlation deduced from the difference between the isoscalar (IS) and the IV sum rule strengths. The effect of the $\Delta$ (${\Delta }_{33}$ resonance)-hole coupling is examined in the IV spin transition and the spin-spin correlations of the ground states.

References in corpus (12)

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Cited by in corpus (4)

• Electric and magnetic dipole modes in high-resolution inelastic proton scattering at $0^{\circ }$
• Isoscalar and Isovector spin response in $sd-$ shell nuclei
• Generator coordinate method with proton--neutron pairing fluctuations and magnetic properties of $N=Z$ odd--odd nuclei
• Competition of deformation and neutron-proton pairing in Gamow-Teller transitions for ${}^{56,58}$Ni and ${}^{62,64}$Ni