The Pygmy Dipole Resonance - status and new developments

被引：3
作者：
Zilges, A. [1 ]
Derya, V. [1 ]
Savran, D. [2 ,3 ,4 ]
Hennig, A. [1 ]
Pickstone, S. G. [1 ]
Spieker, M. [1 ]
机构：
[1] Univ Cologne, Inst Nucl Phys, D-50937 Cologne, Germany
[2] GSI Helmholtzzentrum, EMMI, D-64291 Darmstadt, Germany
[3] GSI Helmholtzzentrum, Div Res, D-64291 Darmstadt, Germany
[4] Frankfurt Inst Adv Studies, D-60438 Frankfurt, Germany
来源：
11TH INTERNATIONAL SPRING SEMINAR ON NUCLEAR PHYSICS: SHELL MODEL AND NUCLEAR STRUCTURE - ACHIEVEMENTS OF THE PAST TWO DECADES | 2015年 / 580卷
关键词：
STRENGTH; ENERGY;
D O I：
10.1088/1742-6596/580/1/012052
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
At energies well below the isovector electric Giant Dipole Resonance, a concentration of electric dipole strength is observed in many stable and radioactive nuclei. This low-lying excitation mode is usually denoted as Pygmy Dipole Resonance (PDR). Different theoretical approaches can reproduce the gross features, like the energetic position and partly the excitation strength of the PDR, but they differ considerably in its underlying structural description. More sophisticated experiments looking for the isospin character, the detailed decay pattern, and the single-particle structure of the low-lying E1 excitations are therefore mandatory to gain a deeper understanding. This manuscript will give an overview about the most recent experimental results and present new experimental tools for the future.
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页数：5
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