MAGNETIC TRANSITIONS IN SI-28 EXCITED BY 180 DEGREES ELECTRON SCATTERING

States in Si28 have been excited by 180°electron scattering at bombarding energies of 39 and 56 MeV. Three strong M1 transitions excited levels at 10.86, 11.41, and 12.27 MeV with ground-state radiation widths of 5.7, 20.8, and 7.3 eV, respectively. Three weaker transitions, probably M1, are also treated. The apparent excitation of M2 transitions which may possibly be identified with theoretically predicted 2- spin-isospin giant resonances is discussed. The relation of these results to the theory of Kurath as well as to nuclear-model assumptions is also discussed. © 1969 The American Physical Society.