Electromagnetic M1 transition strengths from inelastic proton scattering: The cases of 48Ca and 208Pb

Abstract

Inelastic proton scattering at energies of a few hundred MeV and extreme forward angles selectively excites the isovector spin-flip M1 (IVSM1) resonance. A method based on isospin symmetry is presented to extract its electromagnetic transition strength from the (p,p') cross sections. It is applied to 48Ca, a key case for an interpretation of the quenching phenomenon of the spin-isospin response, and leads to a M1 strength consistent with an older (e,e') experiment excluding the almost two times larger value from a recent (γ,n) experiment. Good agreement with electromagnetic probes is observed in 208Pb suggesting the possibility to extract systematic information on the IVSM1 resonance in heavy nuclei.

6 pages, 4 figures

References in corpus (4)

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• Dipole polarizability of 120Sn and nuclear energy density functionals
• On the extraction of weak transition strengths via the (3He,t) reaction at 420 MeV
• Low-energy electric dipole response in 120Sn

Cited by in corpus (23)

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