Cross sections and a complete set of seven independent spin observables have been measured for inclusive quasielastic scattering of 290-MeV protons from 54 Fe at a quasifree momentum transfer of 1.36 fm ~l and energy transfers varying from 0-90 MeV. Comparison of the results with relativistic and nonrelativistic impulse-approximation models shows that Fermi-motion averaging, a realistic nuclear response function, and medium modifications of the AW interaction are essential ingredients of a successful theory.
At 200, 300, and 400 MeV bombarding energies, we measured cross section angular distributions for the Li(p, n) Be(g.s. +0.43 MeV) reaction and 0' cross sections for the ' C(p, n)' N(g. s.) reaction.Systematics of these reactions are presented.The center-of-mass cross section for the Li(p, n) Be(g.s. +0.43 MeV) reaction, when plotted as a function of momentum transfer, is nearly independent of energy. The laboratory cross section for this reaction at 0' in the energy range from 60 to 400 MeV is also independent of energy, having a constant value, to within experimental errors, of 35.5 mb/sr with an estimated uncertainty of +1.5 mb/sr.
PART l AL COPYRIGHT L IZENSE I hereby g r a n t t o Simon F r a s e r U n l v e r s l t y the r i g h t t o lend my t h e s i s , p r o j e c t o r extended essay ( t h e t i t l e o f which i s shown below) t o u s e r s o f t h e Simon F r a s e r University L l b r a r y , and t o make p a r t i a l o r s i n g l e c o p i e s o n l y f o r such users o r I n response t o a r e q u e s t from t h e l i b r a r y o f any o t h e r u n l v e r s l t y , o r o t h e r e d u c a t i o n a l I n s t i t u t i o n , on i t s own b e h a l f o r f o r one o f I t s users. I f u r t h e r egree t h a t p e r m i s s i o n f o r m u l t i p l e copying o f this work f o r s c h o l a r l y purpcses may be g r a n t e d by me o r t h e Dean o f Graduate Studies. I t i s u n d e r s t m d t h a t c o p y i n g o r publication o f t h i s work f o r f i n a n c l~l gain s h a l l not be a l l o w e d w i t h o u t my w r i t t e n permission. Abstract Tests of isospin symmetry in (n,p), (p,p') and (p,n) reactions at 280 MeV for populating the T = 1 isospin triads in A=6 and A=12 nuclei have been performed at TRIUMF. DWIA calculations for the A=12 triad where the known f t asymmetry is included in the analysis show good agreement with experimental (n,p) and (p,pl) data. Similar calculations for the A=6 triad where no asymmetry was assumed show that twice the (p,pt) cross sections taken in the region q = 0.2-0.35 fm-' are slightly ((5.1 f 2.4)%) lower compared with the (p,n) and (n,p) cross sections at q = 0.1 fm-'. This asymmetry may be negligible when the data are extrapolated to q = 0. At q = 0.67 fm-' the the (n,p) cross section is = 45% larger than the (p,pt) cross section. DedicationIn memory of my parents. AcknowledgementI would like to thank Prof. Hausser for taking me on as a graduate student and for financial support during this time, and for sharing with me his wealth of knowledge and experience in all stages of the experiment and ana1ysis;and in particular for his assistance in the theoretical aspects of this work. As well, many people have assisted and advised me in many ways throughout the course of my work at TRIUMF:
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