Polarization Transfer in the O{sup left}16(p,p') Reaction at Forward Angles and Structure of the Spin-dipole Resonances

摘要

Cross sections and polarization transfer observables in the O{sup left}16(p,p') reactions at 392 MeV were measured at forward angles including 0°. The non-spin-flip (△S = 0) and spin-flip (△S=1) strengths in transitions to several discrete states and broad resonances in O{sup left}16 were extracted using a model-independent method. The giant resonances in the energy region of E{sub}x =19.27 MeV were found to be predominantly excited by △L = 1 transitions. The strength distribution of spindipole transitions with △S = 1 and △L = 1 were deduced. The obtained distribution was compared with a recent shell model calculation. Experimental results are reasonably explained by distorted-wave impulse-approximation calculations with the shell model wave functions.