Knockout from ^{46}Ar:ℓ=3 neutron removal and deviations from eikonal theory
Abstract
The ^{9}Be(^{46}Ar,^{45}Ar+γ)X oneneutron removal reaction has been studied in inverse kinematics at 70 MeV/nucleon. Coincidences with γ rays served to disentangle knockout events leading to the ^{45}Ar ground state. The measured partial cross section corresponds to a spectroscopic factor of 4.9(7). The residue momentum distribution is compared with new calculations based on eikonal theory and represents the first case of an ℓ=3 neutron removal, as is expected for populating a 0f_{7/2} hole in the N=28 projectile. However, the measured ^{45}Ar momentum distribution has a marked lowmomentum tail suggestive of dissipative effects whereas the eikonal model predictions are symmetric. The angular distribution of the residues confirms that there is a deviation from the model.
 Publication:

Physical Review C
 Pub Date:
 May 2005
 DOI:
 10.1103/PhysRevC.71.051301
 Bibcode:
 2005PhRvC..71e1301G
 Keywords:

 24.50.+g;
 21.10.Jx;
 27.30.+t;
 Direct reactions;
 Spectroscopic factors and asymptotic normalization coefficients;
 20<
 =A<
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