Giant resonances in the doubly magic nucleus 48Ca from the (e, e'n) reaction.
作者： S. Strauch , P. von Neumann-Cosel , C. Rangacharyulu , A. Richter , G. Schrieder
DOI: 10.1103/PHYSREVLETT.85.2913
关键词: Excitation 、 Spectral line 、 Atomic physics 、 Physics 、 Superconductivity 、 Multipole expansion 、 Quadrupole 、 Magnetic monopole 、 Dipole 、 Resonance
摘要: The 48Ca(e,e(')n) reaction has been investigated for excitation energies 11-25 MeV and momentum transfers 0.22-0.43 fm(-1) at the superconducting Darmstadt electron linear accelerator S-DALINAC. Electric dipole quadrupole plus monopole strength distributions are extracted from a multipole decomposition of spectra. Their fragmented structure is described by microscopic calculations allowing coupling basic particle-hole excitations to more complex configurations. Comparison spectrum residual nucleus 47Ca with statistical model reveals 39(5)% contribution direct decay damping giant resonance.
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