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Toroidal quadrupole transitions associated with collective rotational-vibrational motions of the nucleus

S Misicu

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In the framework of the collective model the longitudinal, transverse and toroidal multipoles corresponding to the excitations of low-lying levels in the ground-state band of several even-even nuclei are computed by inelastic electron scattering (e,e'). In connection with these transitions a new quantity, which accounts for the deviations from the Siegert theorem, is introduced in the framework of the Riemann rotational model with non-vanishing vorticity. Inelastic differential cross sections calculated at backscattering angles show the dominance of toroidal form factors over a broad range of momentum transfer.


PACS

21.60.Ev Collective models

21.10.Ky Electromagnetic moments

23.20.Lv gamma transitions and level energies

25.30.Dh Inelastic electron scattering to specific states

Subjects

Nuclear physics

Dates

Issue 5 (May 1995)



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