Cross sections have been measured for 65 MeV pi(+) scattering to the B-10 ground and first four excited states. The 1.74 MeV excited state results provide the first measurement of the energy dependence of the isovector spin-flip strength parameter. Our analysis indicates that the observed empirical enhancement of the isovector spin-flip strength has little or no dependence on energy at and below resonance. A mass dependence for the empirical enhancement factor may exist.

The spectrum of excited states in the hypernucleus C-13(Lambda) was studied at the Brookhaven Alternate Gradient Synchrotron using the (K-, pi(-)) reaction on an enriched C-13 target. gamma rays coincident with the p(1/2 Lambda) state were observed using two large sodium iodide detectors. We interpret them as arising from the p(1/2 Lambda) --> s(1/2 Lambda) transition in C-13(Lambda). This represents the first direct observation of a gamma ray associated with the transition of a hyperon between major nuclear shells.

Elastic differential cross sections for K+ mesons scattered from natC and 6Li targets have been measured at an incident momentum of 715 MeV/c and at angles of 7° to 42° in the laboratory frame. The experimental cross sections agree, within errors, with two different parameter-free impulse approximation calculations. To reduce the effects of the systematic errors, the ratio of the experimental cross sections for natC to 6Li is compared to the theoretical values, and these ratios do not agree with theory. This discrepancy suggests either a density-dependent alteration of K+-nucleon amplitudes or a failure of the optical potential calculations to describe these nuclides adequately.

K{sup +} nucleus quasifree cross sections measured for a laboratory Kaon beam momentum of 720 MeV/c are presented for fixed three-momentum transfers of 300, 400 and 500 MeV/c. Doubly differential cross sections for Ca and Pb at momentum transfers of 300 and 500 MeV/c and for C at momentum transfers of 300, 400 and 500 MeV/c are displayed and compared to several many-body theoretical calculations with good agreement. Agreement is also found between the measured differential cross sections and simple Glauber calculations used to deduce the effective number of nucleons partaking in the scattering. The long mean free path expected for K{sup +} scattering on nuclei is confirmed by observation of scattering equivalent to 36 nucleons in lead.

At large momentum transfer and energy loss, quasifree (e, e{prime}) cross sections are known to scale in the kinematic variable y. Deviations from scaling behavior signify the onset of non-quasifree knockout processes. The method is extended to weakly interacting mesonic probes. Examples are taken from recent pion and kaon quasifree inclusive experiments.

Differential cross sections for 40, 50, and 65 MeV ${\mathrm{\ensuremath{\pi}}}^{+}$ and ${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$ inelastic scattering to ${1}^{\mathrm{\ensuremath{-}}}$ excitations in $^{12}\mathrm{C}$ have been measured and compared to distorted wave impulse approximation (DWIA) reaction model predictions. Strengths are presented in terms of sum rules for the ${1}^{\mathrm{\ensuremath{-}}}$ state at 10.84 MeV and for the giant dipole resonance from 18 to 25 MeV. An excitation function at q=224 MeV/c for the ${1}^{\mathrm{\ensuremath{-}}}$ state at 10.84 MeV is displayed in the energy range from 50 to 291 MeV showing a non-spin-flip pattern. We find inadequacies in the detailed comparison of the shapes of the data to DWIA calculations using several standard nuclear models.

Inelastic pi+/- cross-section measurements at a pion incident energy of 162 MeV were made for 12 previously known 6- states in Mg-26. The peak resolution was significantly improved over a previous Mg-26(pi,pi') report describing only two 6- states. Using both harmonic oscillator and Woods-Saxon wave functions (unbound as necessary), the pion scattering data were combined with electron scattering data to determine the isoscalar magnetic structure coefficients for each state. Although more stretched transitions have been located by pion scattering on Mg-26 than in any other nucleus, the total isoscalar strength was only 12% of the extreme single particle sum rule, and only about 1/4 of that predicted by more complete calculations. Discrepancies between the isoscalar strengths for several of these states and those found from a combined electron-proton scattering analysis are pointed out.

Differential cross sections for 40, 50 and 65 MeV pi+ and pi- inelastic scattering to 1- excitations in 12 C have been measured and compared to distorted wave impulse approximation (DWIA) reaction model predictions. Strengths are presented in terms of sum rules for the 1- state at 10.84 MeV and for the giant dipole resonance from 18 to 25 MeV. An excitation function at q =224 MeV/c for the 1- state at 10.84 MeV is displayed in the energy range from 50 to 291 MeV, showing a non-spinflip pattern. We find inadequacies in the detailed comparison of the shapes of the data to DWIA calculations using several standard nuclear models.