Competing electric and magnetic excitations in backward electron scattering from heavy deformed nuclei

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dc.creatorNojarov, R.
dc.creatorFaessler, Amand
dc.creatorDingfelder, M.
dc.date1995-09-22
dc.date.accessioned2026-07-07T11:15:29Z
dc.date.available2026-07-07T11:15:29Z
dc.descriptionImportant $E2$ contributions to the $(e,e^{\prime})$ cross sections of low-lying orbital $M1$ excitations are found in heavy deformed nuclei, arising from the small energy separation between the two excitations with $I^πK = 2^+1$ and 1$^+1$, respectively. They are studied microscopically in QRPA using DWBA. The accompanying $E2$ response is negligible at small momentum transfer $q$ but contributes substantially to the cross sections measured at $θ= 165 ^{\circ}$ for $0.6 < q_{\rm eff} < 0.9$ fm$^{-1}$ ($40 \le E_i \le 70$ MeV) and leads to a very good agreement with experiment. The electric response is of longitudinal $C2$ type for $θ\le 175 ^{\circ}$ but becomes almost purely transverse $E2$ for larger backward angles. The transverse $E2$ response remains comparable with the $M1$ response for $q_{\rm eff} > 1.2$ fm$^{-1}$ ($E_i > 100$ MeV) and even dominant for $E_i > 200$ MeV. This happens even at large backward angles $θ> 175 ^{\circ}$, where the $M1$ dominance is limited to the lower $q$ region.
dc.descriptionRevTeX, 19 pages, 8 figures included Accepted for publication in Phys Rev C
dc.identifierhttps://arxiv.org/abs/nucl-th/9509037
dc.identifierhttp://arxiv.org/abs/nucl-th/9509037
dc.identifierPhys.Rev.C52:3259-3276,1995
dc.identifierdoi:10.1103/PhysRevC.52.3259
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192404
dc.subjectNuclear Theory
dc.titleCompeting electric and magnetic excitations in backward electron scattering from heavy deformed nuclei
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