Dependence of deformed heavy ion (7Li) scattering on the orientation of the alignment axis

doi:10.1016/0370-2693(80)90995-8

Physics Letters B

Volume 91, Issues 3–4, 21 April 1980, Pages 358-360

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Abstract

The scattering of aligned ⁷Li on ⁵⁸Ni at E_Li = 14.22 MeV was investigated for different spin alignment axes of the mass quadrupole moment of ⁷Li. For a fixed scattering angle the change in cross section due to the alignment of the quadrupole moment turns out to be proportional to the change in distance between the ⁷Li and ⁵⁸Ni surfaces at the distance of closest approach.

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Vector polarization in a heavy-ion collision is influenced by coupling to inelastic channels. In the adiabatic approximation the coupling can be represented by an energy-independent induced spin–orbit interaction. The present paper presents a generalization which includes nonadiabatic effects as well as a contribution from the ground-state quadrupole moment. The derivation is based on second-order perturbation theory. The approximate effective spin–orbit potential includes the effects of the coupling to an inelastic channel for all values of the interaction time τ₀. It reduces to the adiabatic approximation when τ₀Δε/ℏ⪢1 where Δε is the channel excitation energy. There is an application to the vector polarization observed in the scattering of ⁶Li and ⁷Li by ⁵⁸Ni.
Observation of peripheral localization in polarized nuclear reactions
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¹: On leave of absence from Institute of Nuclear Research, Warsaw, Poland.

²: Present address: FB Physik, Universität Marburg, W. Germany.

³: On leave of absence from Physics Department, University of Birmingham, England.

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Physics Letters B

Abstract

References (9)

Phys. Lett.

Rev. Phys. Appl.

Cited by (28)

The heavy-ion spin-orbit interaction

Observation of peripheral localization in polarized nuclear reactions

Mechanism of the elastic and inelastic scattering of polarised <sup>7</sup>Li by <sup>54</sup>Fe at 70 and 50 MeV

Nuclear physics with polarized heavy ions

Tidal symmetry in scattering of polarized <sup>23</sup>Na from <sup>208</sup>Pb

Neutron transfer reactions induced by polarized <sup>7</sup>Li