تقرير
Pygmy dipole resonance in 208Pb
| العنوان: | Pygmy dipole resonance in 208Pb |
|---|---|
| المؤلفون: | Poltoratska, I., von Neumann-Cosel, P., Tamii, A., Adachi, T., Bertulani, C. A., Carter, J., Dozono, M., Fujita, H., Fujita, K., Fujita, Y., Hatanaka, K., Itoh, M., Kawabata, T., Kalmykov, Y., Krumbholz, A. M., Litvinova, E., Matsubara, H., Nakanishi, K., Neveling, R., Okamura, H., Ong, H. J., Özel-Tashenov, B., Ponomarev, V. Yu., Richter, A., Rubio, B., Sakaguchi, H., Sakemi, Y., Sasamoto, Y., Shimbara, Y., Shimizu, Y., Smit, F. D., Suzuki, T., Tameshige, Y., Wambach, J., Yosoi, M., Zenihiro, J. |
| سنة النشر: | 2012 |
| المجموعة: | Nuclear Experiment Nuclear Theory |
| مصطلحات موضوعية: | Nuclear Experiment, Nuclear Theory |
| الوصف: | Scattering of protons of several hundred MeV is a promising new spectroscopic tool for the study of electric dipole strength in nuclei. A case study of 208Pb shows that at very forward angles J^pi = 1- states are strongly populated via Coulomb excitation. A separation from nuclear excitation of other modes is achieved by a multipole decomposition analysis of the experimental cross sections based on theoretical angular distributions calculated within the quasiparticle-phonon model. The B(E1) transition strength distribution is extracted for excitation energies up to 9 MeV, i.e., in the region of the so-called pygmy dipole resonance (PDR). The Coulomb-nuclear interference shows sensitivity to the underlying structure of the E1 transitions, which allows for the first time an experimental extraction of the electromagnetic transition strength and the energy centroid of the PDR. Comment: submitted to Phys. Rev. C |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevC.85.041304 |
| URL الوصول: | http://arxiv.org/abs/1203.2155 |
| رقم الأكسشن: | edsarx.1203.2155 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevC.85.041304 |
|---|