Nuclear giant multipole resonances by inelastic electron scattering
By: [by] Fred R. Buskirk
Contributors: Naval Postgraduate School (U.S.); National Science Foundation (U.S.)
Publisher: Naval Postgraduate School
Published: 1979
Place of publication: Monterey, California
Language: eng
Subjects: Electrons; Nuclear quadrupole resonance; Scattering
Description: Inelastic electron scattering experiments were performed with the Naval Postgraduate School 110 MeV Linac. The investigation included 238U, 140Ce, 89Y, 60Ni, 58Ni and 28Si, which combined with our previous studies of 208Pb, 197Au and 165Ho, form a survey of the giant resonances in many nuclei. The energy resolution of about 0.4% to 0.5%, was usually sufficient for studying these broad resonances; the excitation energy range covered was from 4 to 40 or 50 MeV, and showed giant resonances of energies from 6 to 33 MeV. Forward scattering angles were used resulting in only electric multipole resonances. The cerium experiment possibly revealed more than any other single nucleus studied. In addition to E2 Delta T =0) at 10 MeV and E1 at 15.3 MeV, the isovector E2 appears at 25 MeV. E3 resonances appear at 6.0 MeV, 22 MeV and 34638 MeV in general agreement with the model of Bohr and Mottelson. For Uranium, both quadrupole resonances were observed, but were low in strength unless a transition radius larger than the ground state radius was assumed. Systematics of the resonance at 53 cu.rt. (1/A) MeV showed a smooth and drastic decrease with strength as a function of decreasing A, a behavior not seen for the GQR at 63 cu.rt.(1/A) MeV. This suggests the former resonance is an oscillation of the excess neutron of a heavy nucleus.
Notes: Title from cover.

"Prepared for: National Science Foundation"--Cover.

"Sponsor: National Science Foundation."

"29 May 1979."

"Final technical report 1 Nov 1976 to 31 July 1979"--Cover.

"Project PHY 76 23886"--Cover.

"NPS-61-79-009"--Cover.

DTIC Identifiers: Giant resonance, haydrons, sum rules.

Author(s) key words: Electron scattering, giant multipole resonances, nuclear hydroynamics.

Includes bibliographical references.

"Approved for public release; distribution unlimited"--Cover.

Technical report; 1979.

kmc/kmc 10/13/09.