Nuclear Structure Studies by the Scattering of High-Energy Electrons. Progress Report,January 1, 1976--September 30, 1976.

摘要

The rms charge radius of exp 3He was measured to be 1.90 +- 0.05 fm by means of low momentum transfer electron scattering at the National Bureau of Standards. A report to be submitted for publication is being prepared. In July a fifth (e,e') spectrum was measured at NBS for the exp 20Ne giant resonance region. The analysis of exp 20Ne data without the need of an arbitrary quasielastic continuum contribution is completed. The region between the neutron and proton thresholds is dominantly of electric quadrupole character,and that above the proton threshold of electric dipole character. Form factors were extracted. Magnetic elastic scattering was measured for exp 25Mg at the Bates Electron Linear Accelerator of Middleton,Massachusetts. A fixed scattering angle of 160exp 0 ,and electron energies between 140and 270MeV were used. The ground state M5form factors were extracted after corrections were made for Coulomb scattering contributions at 160exp 0 . Forward-angle data taken at Mainz,Germany in a U. Mass.-Mainz collaborative experiment were used in making these corrections and in extracting C2,and for the first time, C4moments. At the I.K.O. laboratory of Amsterdam,The Netherlands, M1and some M3form factor points were measured. Thus information on form factors of all possible multipoles was obtained. (ERA citation 02:023549)