QUASI-ELASTIC ELECTRON-SCATTERING FROM CA-40

Differential cross sections for quasielastic electron scattering on Ca -40 have been measured at laboratory scattering angles of 45.5 degrees , 90 degrees, and 140 degrees with bombarding energies ranging from 13 0 to 840 MeV. Transverse and longitudinal response functions have been extracted for momentum transfers from 300 to 500 MeV/c. Contrary to s ome previously reported results, the total observed longitudinal stren gth agrees with the relativistic Fermi gas prediction to within +/- 18 %.