Isoscalar giant resonances in Si-28 and the mass dependence of nuclear compressibility
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Date
2002
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Publisher
American Physical Society
Abstract
The giant resonance region from 8 MeV < E-x < 55 MeV in Si-28 has been studied with inelastic scattering of 240 MeV alpha particles at small angles including 0degrees. Strength corresponding to 81 +/- 10%, 68 +/- 9%, and 15 +/-4% of the isoscalar E0, E2, and E1 sum rules, respectively, was identified with centroids of 21.25 +/-0.38 MeV, 18.54 +/- 0.25 MeV, 19.15 +/- 0.60 MeV, and rms widths of 6.4 +/- 0.6 MeV, 4.7 +/- 0.6 MeV, and 6.9 +/- 0.7 MeV. The mass dependence of the compression modulus of finite nuclei is shown to be reasonably well reproduced from A = 24 to 208 in relativistic mean field calculations with the NLC interaction having K-nm 5225 MeV and in nonrelativistic calculations with the RATP interaction having K-nm 5240 MeV.
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Keywords
MONOPOLE RESONANCE, BREATHING MODE, INCOMPRESSIBILITY, SCATTERING, MATTER, STRENGTH, CA-40, NI-58, Physics
Citation
David H. Youngblood, Y. W. Lui and H. L. Clark. Phys.Rev.C 65 034302 2002. "Copyright (2002) by the American Physical Society."