Nuclear structure studies with gamma-ray beams

Journal Article · Thu May 28 00:00:00 EDT 2015 · EPJ Web of Conferences

DOI:https://doi.org/10.1051/epjconf/20159301030· OSTI ID:1208912

Tonchev, Anton ^[1]; Bhatia, Chitra ^[2]; Kelley, John ^[3]; Raut, Rajarshi ^[4]; Rusev, Gencho ^[5]; Tornow, Werner ^[6]; Tsoneva, Nadia ^[7]

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1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
2. McMaster University, Hamilton, ON(Canada)
3. North Carolina State Univ., Raleigh, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States)
4. Kolkata Centre, Kolkata (India). UGC-DAE Consortium for Scientific Research.
5. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
6. Duke Univ., Durham, NC (United States); Triangle Univ. Nuclear Lab., Durham, NC (United States)
7. Universitàt Giessen (Germany). Institut för Theoretische Physik; Institute for Nuclear Research and Nuclear Energy, Sofia (Bulgaria)

In stable and weakly bound neutron-rich nuclei, a resonance-like concentration of dipole states has been observed for excitation energies below the neutron-separation energy. This clustering of strong dipole states has been named the Pygmy Dipole Resonance (PDR) in contrast to the Giant Dipole Resonance (GDR) that dominates the E1 response. Understanding the PDR is presently of great interest in nuclear structure and nuclear astrophysics. High-sensitivity studies of E1 and M1 transitions in closed-shell nuclei using monoenergetic and 100% linearly-polarized photon beams are presented.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• Grant/Contract Number: AC52-06NA25396
• OSTI ID: 1208912
• Journal Information: EPJ Web of Conferences, Vol. 93; ISSN 2100-014X
• Publisher: EDP Sciences
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS