Phys. Rev. C 55, 2811 - 2818 (1997)Giant monopole resonance strength in 40Ca |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1973: |
D. H. Youngblood, Y.-W. Lui, and H. L. Clark
Cyclotron Institute, Texas A&M University, College Station, Texas 77842
Received 2 December 1996
The giant resonance region in 40Ca was studied with inelastic scattering of 240 MeV α particles at small angles including 0°. A peak at Ex=17.5±0.4 MeV with Γ=4.95±0.25 MeV was found to contain 33±4% of the isoscalar E0 energy-weighted-sum-rule (EWSR) strength and 57±6% of the isoscalar E2 EWSR. Evidence was found for 92±15% of the isoscalar E0 EWSR between 8<Ex<29 MeV with a centroid of 18.9±0.4 MeV and a rms half width of 11.1 MeV but a definitive L=0 assignment could not be made. The resulting EGMR is in agreement with systematics from heavier nuclei.
©1997 The American Physical Society
URL: http://link.aps.org/abstract/PRC/v55/p2811
DOI: 10.1103/PhysRevC.55.2811
PACS: 24.30.Cz, 25.55.Ci, 27.40.+z, 27.80.+w
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