Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2000-03-13
Phys.Rev. C62 (2000) 051304
Physics
Nuclear Physics
Nuclear Theory
4 Revtex pages and 3 eps figures; submitted to PRC
Scientific paper
10.1103/PhysRevC.62.051304
We calculate the longitudinal response of 208Pb using a relativistic random-phase approximation to three different parameterizations of the Walecka model with scalar self-interactions. From a nonspectral calculation of the response-that automatically includes the mixing between positive- and negative-energy states-we extract the distribution of strength for the isoscalar monopole, dipole, and high-energy octupole resonances. We employ a consistent formalism that uses the same interaction in the calculation of the ground state as in the calculation of the response. As a result, the conservation of the vector current is strictly maintained throughout the calculation. Further, at small momentum transfers the spurious dipole strength-associated with the uniform translation of the center-of-mass-gets shifted to zero excitation energy and is cleanly separated from the sole remaining physical fragment located at an excitation energy of about 24 MeV; no additional dipole strength is observed. The best description of the collective modes is obtained using a ``soft'' parameterization having a compression modulus of K=224 MeV.
No associations
LandOfFree
Relativistic Approach to Isoscalar Giant Resonances in 208Pb does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Relativistic Approach to Isoscalar Giant Resonances in 208Pb, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relativistic Approach to Isoscalar Giant Resonances in 208Pb will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-460172