A Investigation of the DeuteronNucleus Tensor Interaction in ZIRCONIUM90
Abstract
An investigation of the role of the deuteronnucleus tensor interaction is made through measurement of angular distributions of the cross section, analyzing powers and the polarization transfer observable (PTO) 3K_sp {y}{z^{'}z^ {'}} + K_sp {yy}{z^{'}z^ {'}} for deuteron elastic scattering from ^{90}Zr at 15 MeV. Two compact and efficient deuteron polarimeters based on the ^3He(d,p)^4He reaction were designed and built to perform the polarization transfer measurements. The observable K_sp{y} {z^{'}z^{' }} proved to be very sensitive to the presence of a T_{r}type tensor interaction and also to provide information which cannot be obtained through measurement of tensor analyzing powers. The measurement of PTO and of the tensor analyzing power A_{xz} provide a particularly effective means of parameterizing the tensor interaction. Phenomenological optical model calculations give a real T_{r} potential which differs significantly from folding model predictions, in that it is weaker and predominantly surfacepeaked. The imaginary T_{r} potential, however, is in qualitative agreement with the folding model. In addition to the optical model analysis, finiterange coupled channels calculations were performed coupling the three most strongly populated ^{90}Zr (d,p)^{91}Zr states to the elastic channel in order to gauge the contribution of the (d,p) channel to the deuteronnucleus tensor interaction. Coupling effects on the observables were found to be small and equivalent to that of an imaginary T_{r} tensor potential 1/5 of that used in the optical model analysis.
 Publication:

Ph.D. Thesis
 Pub Date:
 January 1990
 Bibcode:
 1990PhDT........90A
 Keywords:

 POLARIZED DEUTERON;
 POLARIZED DEUTERON)ZIRCONIUM90 ELASTIC SCATTERING (ZIRCONIUM90;
 TENSOR;
 Physics: Nuclear