Download or read book Spin Excitations in Pion Inelastic Scattering written by and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The data on spin excitations observed in pion inelastic scattering are reviewed. A predominant feature of this process is the selectivity with which high-spin unnatural-parity states are excited. Constant-q excitation functions have proven valuable in identifying unnatural-parity states because of the unique signature of .delta. S = 1 transitions. It has recently been shown that angular distributions measured for transitions to natural-parity states are quite different for .delta. S = 0 and .delta. S = 1 transitions. Pion scattering should continue to prove useful in studying the spin structure of nuclear transitions because of the sensitivity of both excitation functions and angular distributions to the spin transferred to the nucleus. In particular, pion scattering measurements may be helpful in searches for spin-mode giant resonances. In addition to the ability to distinguish transitions dominated by .delta. S = 1, comparisons of .pi. and .pi.− scattering can be used to determine the relative contributions of neutrons and protons to inelastic transitions. In each N not equal to Z nucleus studied there have been large .pi./.pi.−, asymmetries observed for some transitions to stretched states. This results in information that is not obtainable from 180° electron scattering.