Polarization in Heavy-Ion Inelastic Scattering in the Coulomb-Nuclear Interference Region

Spin alignment and polarisation in the (16O,15N) transfer reactions

“…The measurement of the polarisation or spin alignment of reaction products can by itself give important information on the reaction process. These measurements are usually done using the angular correlation method, where the 7-ray distribution is measured [4] or for states unstable to particle decay with the measurement of particle correlation functions [5]. The increased interest in spin dependent effects in heavy ion reactions is due to the observation of anomalous angular distributions for single and mul-* Also Fachbereich Physik, Freie Universit~it Berlin tinucleon transfer [3,6]; it is also evident that with increasing incident energy and increasing angular momenta the importance of spin-orbit effects in heavy ion reactions must become obvious.…”

Spin alignment of excited projectiles due to target spin-flip interactions

“…Spin alignment is found in a diverse number of reactions including inelastic scattering [1][2][3][4][5][6], deep elastic scatter ing [7][8][9][10], projectile fragmentation [11][12][13][14][15][16][17][18], fission [19,20], Coulomb excitation [21], and other direct reactions [22][23][24][25][26][27][28], For peripheral reactions, the dominant angular momentum in the reaction is the initial orbital angular momentum between the projectile and target, which is perpendicular to both the beam axis and the reaction plane. It is therefore not surprising that many fragments have their spin aligned, on av erage, parallel to this direction [7,11,12,[21][22][23]27], However, there are some cases where different alignments are found [13][14][15][16]18], Measurement of a fragment's spin alignment can be deduced from its decay products, including fi particles though NMR techniques [11,12], from the recoil induced by y-ray decay [23,2...…”

Interaction of 80 MeV12C with88Sr; Neutron transfer, inelastic scattering and spin alignment of the 2+ State of12C

“…[2] and [5]), Coulomb excitation strongly populates only one substate, m=-J, which corresponds to a strong polarization of the spin J. Therefore the interference pattern and the cross section for Coulomb excitation in this representation is localized most completely in the m=-2 substate.…”

“…A complete understanding of the individual contributions to the total inelastic excitation amplitude (real and imaginary nuclear parts, Coulomb excitation) needs a measurement of the population of the m-substates. Measurements of target excitation using the 7-ray correlation technique have been done for a few systems [5][6]. The present study is concerned with the measurement of the msubstate population for projectile excitation (the cross sections for the target excitation are measured simultaneously).…”