Excitations of 2 1 + and 3 1 − </mml:…
1992; American Institute of Physics; Volume: 46; Issue: 5 Linguagem: Inglês
10.1103/physrevc.46.1811
ISSN1538-4497
AutoresM. Kennedy, P. D. Cottle, K. W. Kemper,
Tópico(s)Advanced NMR Techniques and Applications
ResumoA reanalysis of (p,p') data taken on ${2}_{1}^{+}$ and ${3}_{1}^{\mathrm{\ensuremath{-}}}$ states of 37 even-even A\ensuremath{\ge}40 nuclei at energies of E50 MeV has been performed with a consistent procedure involving coupled-channels calculations and Becchetti-Greenlees optical model parameters. The matrix elements extracted from this analysis have been compared to matrix elements deduced from electromagnetic measurements of the same excitations. It is concluded that the differences between (p,p') and electromagnetic results which are often observed do not result from variations in the method of analysis of the (p,p') data. Instead, the differences are caused by experimental errors and nuclear structure effects. The nuclear structure effects are examined by extracting the ratios ${\mathit{M}}_{\mathit{n}}$/${\mathit{M}}_{\mathit{p}}$ of the neutron and proton multipole matrix elements for both the ${2}_{1}^{+}$ and ${3}_{1}^{\mathrm{\ensuremath{-}}}$ states from the proton and electromagnetic data.
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