Low-Energy Magnetic Radiation

Abstract

A pronounced spike at low energy in the strength function for magnetic radiation (LEMAR) is found by means of Shell Model calculations, which explains the experimentally observed enhancement of the dipole strength. LEMAR originates from statistical low-energy M1-transitions between many excited complex states. Re-coupling of the proton and neutron high-j orbitals generates the strong magnetic radiation. LEMAR is predicted for nuclides with $A\approx 132$ participating in the r-process of element synthesis. It increases the reaction rates by a factor of 2.5. The spectral function of LEMAR follows Planck's Law. A power law for the size distribution of the $B(M1)$ values are found.

arXiv commentarXiv admin note: text overlap with arXiv:1407.1721

References in corpus (8)

• Neutron capture in low mass Asymptotic Giant Branch stars: cross sections and abundance signatures
• Transition Rates between Mixed Symmetry States: First Measurement in 94Mo
• Radiative strength functions in 93-98Mo
• Low-energy enhancement of magnetic dipole radiation
• Neutron Capture Rates near A=130 which Effect a Global Change to the r-Process Abundance Distribution
• Statistical Fluctuations of Electromagnetic Transition Intensities and Electromagnetic Moments in pf-Shell Nuclei
• Statistical Fluctuations of Electromagnetic Transition Intensities in pf-Shell Nuclei
• Low-energy magnetic radiation: deviations from GOE

Cited by in corpus (3)

• Estimation of M1 scissors mode strength for deformed nuclei in the medium to heavy mass region by statistical Hauser-Feshbach model calculations
• Reverse engineering nuclear properties from rare earth abundances in the $r$ process
• Benchmark of many-body approaches for magnetic dipole transition strength