Reactions with polarized electrons and photons at low momentum transfers at the superconducting Darmstadt electron linear accelerator S–DALINAC

Enders, J.; Bahlo, Thore; Bangert, P.; Barday, R.; Brunken, M.; Eckardt, C.; Eichhorn, Ralf; Espig, Martin; Freudenberger, M.; Göök, Alf; Ingenhaag, C.; Lindemann, J.; Neumann-Cosel, P. von; Oberstedt, S.; Poltoratska, Y.; Richter, A.; Roth, Markus; Schneider, F.; Wagner, Max; Weber, A.; Zwicker, B.

doi:10.1088/1742-6596/295/1/012152

Cited by 3 publications

(1 citation statement)

References 19 publications

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“…Details of the nuclear ground-state charge distributions and of the spatial distribution of the lower magnetic moments can be traced by a systematic measurement of the spin asymmetry, which is particularly sensitive to small changes in these distributions. Such experiments are planned at the S-DALINAC in Darmstadt/Germany where not only the beam energy can be varied, but also the scattering angle, since the spectrometer allows measurements at angles 178 • -180 • with a resolution of 0.2 • -0.3 • [22,23]. Up to now there exists only one experiment on the angular dependence of the spin asymmetry (at 14 MeV) which proves the effect of a finite nuclear size without being sensitive to the charge distribution [24].…”

Section: Introductionmentioning

confidence: 99%

DWBA theory for elastic scattering of polarized electrons from heavy unpolarized nuclei

Jakubaßa-Amundsen¹

2014

J. Phys. G: Nucl. Part. Phys.

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Differential cross sections and spin asymmetries for the elastic scattering of spin-polarized electrons from inert spin- nuclei are calculated within the distorted-wave (DW) Born approximation. This is achieved by means of a coherent superposition of the electric and magnetic (M1) transition amplitudes, using Dirac eigenfunctions for the electronic scattering states throughout. For heavy nuclei (Z ≳ 40), high collision energies and backward scattering angles considerable deviations occur from previous DW plane-wave calculations where the magnetic transition is calculated within the Born approximation. For electrons spin-polarized perpendicular to the beam direction the spin asymmetry is quenched when magnetic scattering becomes dominant. Predictions are made for 50–200 MeV electrons scattering from 15N, 89Y and 207Pb nuclei.

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Section: Introductionmentioning

confidence: 99%

DWBA theory for elastic scattering of polarized electrons from heavy unpolarized nuclei

Jakubaßa-Amundsen¹

2014

J. Phys. G: Nucl. Part. Phys.

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Polarization in nuclear excitation by electron impact

Jakubaßa-Amundsen¹

2015

Nuclear Physics A

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Validity of sum rules for the polarization transfer in electron bremsstrahlung

Jakubaßa-Amundsen¹

2017

Eur. Phys. J. D

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A formal derivation of the polarization correlations between the incident electron and the scattered electron is given for a general class of transition operators. In correspondence to the case of bremsstrahlung emission, three sum rules for the polarization correlations are predicted, which reduce to the known one for potential scattering. Further examples, including the 1 + 2 and 2 + 1 excitations of the 12 C nucleus and a 1 − excitation of the 208 Pb nucleus, are discussed and the validity of the corresponding sum rules is investigated.

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Reactions with polarized electrons and photons at low momentum transfers at the superconducting Darmstadt electron linear accelerator S–DALINAC

Cited by 3 publications

References 19 publications

DWBA theory for elastic scattering of polarized electrons from heavy unpolarized nuclei

DWBA theory for elastic scattering of polarized electrons from heavy unpolarized nuclei

Polarization in nuclear excitation by electron impact

Validity of sum rules for the polarization transfer in electron bremsstrahlung

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