Looking for the isoscalar giant dipole resonance in inelastic {alpha} scattering at and near 0{degrees}
- Univ. of Notre Dame, South Bend, IN (United States); and others
The evidence for the isoscalar giant dipole resonance (ISGDR) or the {open_quotes}squeezing mode{close_quotes} has been rather sparse so far. However, indications for this resonance have been reported in very forward inelastic proton and {alpha} scattering experiments on {sup 208}Pb and {sup 144}Sm. Unambiguous identification of the ISGDR is only possible at angles near 0{degrees} because of the significant difference of resonance cross sections at these angles. The authors have made ({alpha},{alpha}{prime}) measurements at the IUCF K600 spectrometer at very small angles (including 0{degrees}) to study the ISGDR in {sup 208}Pb. Data has been obtained at 0{degrees}- 2{degrees} as well as between 4{degrees} and 10{degrees}. A broad bump, presumably consisting of the ISGDR and the HEOR, is visible above background in their spectra. They are presently in the process of disentangling the two resonances using the {open_quotes}difference-of-spectra{close_quotes} technique previously used in separating the L=0 and L=2 resonances. Results of this analysis as well as data on {sup 90}Zr and {sup 120}Sn will be presented.
- OSTI ID:
- 243925
- Report Number(s):
- CONF-9304297-; ISSN 0003-0503; TRN: 96:002199-0452
- Journal Information:
- Bulletin of the American Physical Society, Vol. 38, Issue 2; Conference: 1993 joint meeting of the American Physical Society and the American Association of Physics Teachers, Washington, DC (United States), 12-15 Apr 1993; Other Information: PBD: Apr 1993
- Country of Publication:
- United States
- Language:
- English
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