Accession Number : AD0639800

Title :   EXCITATION OF A 19-MEV LEVEL IN C12 BY INELASTIC ELECTRON SCATTERING,

Corporate Author : HIGH ENERGY PHYSICS LAB STANFORD UNIV CALIF

Personal Author(s) : Crannell,Hall ; dahl,Harvey A. ; Lewis,F. H. ,Jr.

Report Date : MAR 1966

Pagination or Media Count : 15

Abstract : Measurements of inelastic electron scattering cross sections for Carbon-12 were made for transitions to a level at approximately 19.5 MeV. The cross section peak corresponding to excitation of this level is clearly visible above the inelastic continuum over the range of momentum transfers from 267 MeV/c to 643 MeV/c at electron scattering angles between 40 degrees and 48 degrees. Form factors derived from the experimental data are compared to theoretical form factors calculated by assuming the excitation involves a single-particle dipole transition to a T = 1, J = 1- state. A search for levels with higher excitation energies was also undertaken, special attention being focused on the region 30 MeV to 45 MeV. This failed to uncover, within the experimental sensitivity, any levels with excitation energy greater than 20 MeV. (Author)

Descriptors :   (*CARBON, *NUCLEAR ENERGY LEVELS), (*ELECTRON IRRADIATION, CARBON), INELASTIC SCATTERING, ELECTRON TRANSITIONS, MOMENTUM, DIPOLE MOMENTS, EXCITATION

Subject Categories : Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE