Spin polarization of $^{34}$Al fragments produced by nucleon pickup at intermediate energies
Language
en
Article de revue
This item was published in
Physical Review C. 2006, vol. 73, p. 044313
American Physical Society
English Abstract
The polarization of ${34}$Al fragments, produced by single neutron pickup from a ${9}$Be target by a ${36}$S projectile at 77.5 MeV/nucleon, have been observed at GANIL via the detection of resonantly destroyed $\beta$-asymmetry. ...Read more >
The polarization of ${34}$Al fragments, produced by single neutron pickup from a ${9}$Be target by a ${36}$S projectile at 77.5 MeV/nucleon, have been observed at GANIL via the detection of resonantly destroyed $\beta$-asymmetry. The reaction-induced polarization is deduced using a tentative spin/parity assignment for the $^{34}$Al ground state. A positive polarization was measured near the peak of the $^{34}$Al yield curve. A kinematical model based on the spectator-participant model for projectile fragmentation reactions has been extended in order to take into account the features of pickup reactions, i.e., the picked-up nucleon having an average momentum equal to the Fermi momentum and aligned along the incident beam direction. The trend-line in the observed spin-orientation is very well reproduced by this model.Read less <
English Keywords
nuclei with mass number 20 to 38
nuclear fragmentation
pick-up reactions
nuclear spin
polarisation in nuclear reactions and scattering
nuclear parity
nuclear energy levels
heavy ion-nucleus reactions
Origin
Hal imported