Nuclear Structure Studies with Gamma-Ray Beams

被引：2

作者：

Tonchev, Anton ^{[1
]}

Bhatia, Chitra ^{[7
]}

Kelley, John ^{[4
,5
]}

Raut, Rajarshi ^{[6
]}

Rusev, Gencho ^{[2
]}

Tornow, Werner ^{[3
,4
]}

Tsoneva, Nadia ^{[8
,9
]}

机构：

[1] Lawrence Livermore Natl Lab, Div Phys, Livermore, CA 94550 USA

[2] Los Alamos Natl Lab, Div Chem, Los Alamos, NM 87545 USA

[3] Duke Univ, Durham, NC 27708 USA

[4] Triangle Univ Nucl Lab, Durham, NC 27708 USA

[5] N Carolina State Univ, Raleigh, NC 27695 USA

[6] UGC DAE Consortium Sci Res, Kolkata Ctr, Kolkata, India

[7] McMaster Univ, Hamilton, ON, Canada

[8] Univ Giessen, Inst Theoret Phys, Giessen, Germany

[9] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, BU-1784 Sofia, Bulgaria

来源：

CGS15 - CAPTURE GAMMA-RAY SPECTROSCOPY AND RELATED TOPICS | 2015年 / 93卷

关键词：

PYGMY DIPOLE RESONANCE; N=82 NUCLEI; EXCITATIONS;

D O I：

10.1051/epjconf/20159301030

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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.

引用

页数：5

共 32 条

[1] Neutron cross sections for nucleosynthesis studies [J].

Bao, ZY ;

Beer, H ;

Käppeler, F ;

Voss, F ;

Wisshak, K ;

Rauscher, T .

ATOMIC DATA AND NUCLEAR DATA TABLES, 2000, 76 (01) :70-154

[2] Isospin properties of electric dipole excitations in 48Ca [J].

Derya, V. ;

Savran, D. ;

Endres, J. ;

Harakeh, M. N. ;

Hergert, H. ;

Kelley, J. H. ;

Papakonstantinou, P. ;

Pietralla, N. ;

Ponomarev, V. Yu. ;

Roth, R. ;

Rusev, G. ;

Tonchev, A. P. ;

Tornow, W. ;

Wortche, H. J. ;

Zilges, A. .

PHYSICS LETTERS B, 2014, 730 :288-292

[3]

Enders J, 2004, NUCL PHYS A, V741, P3, DOI 10.1016/j.nuclphysa.2004.05.014

[4] Dipole response of 76Se above 4 MeV [J].

Goddard, P. M. ;

Cooper, N. ;

Werner, V. ;

Rusev, G. ;

Stevenson, P. D. ;

Rios, A. ;

Bernards, C. ;

Chakraborty, A. ;

Crider, B. P. ;

Glorius, J. ;

Ilieva, R. S. ;

Kelley, J. H. ;

Kwan, E. ;

Peters, E. E. ;

Pietralla, N. ;

Raut, R. ;

Romig, C. ;

Savran, D. ;

Schnorrenberger, L. ;

Smith, M. K. ;

Sonnabend, K. ;

Tonchev, A. P. ;

Tornow, W. ;

Yates, S. W. .

PHYSICAL REVIEW C, 2013, 88 (06)

[5] Improved predictions of nuclear reaction rates with the TALYS reaction code for astrophysical applications [J].

Goriely, S. ;

Hilaire, S. ;

Koning, A. J. .

ASTRONOMY & ASTROPHYSICS, 2008, 487 (02) :767-774

[6] Large-scale QRPA calculation of E1-strength and its impact on the neutron capture cross section [J].

Goriely, S ;

Khan, E .

NUCLEAR PHYSICS A, 2002, 706 (1-2) :217-232

[7] Magnetic dipole excitations in nuclei: Elementary modes of nucleonic motion [J].

Heyde, Kris ;

von Neumann-Cosel, Peter ;

Richter, Achim .

REVIEWS OF MODERN PHYSICS, 2010, 82 (03) :2365-2419

[8] Emergence of pygmy dipole resonances: Magic numbers and neutron skins [J].

Inakura, Tsunenori ;

Nakatsukasa, Takashi ;

Yabana, Kazuhiro .

PHYSICAL REVIEW C, 2011, 84 (02)

[9] Photonuclear data and modern physics of giant resonances [J].

Kamerdzhiev, S. P. ;

Kovalev, S. F. .

PHYSICS OF ATOMIC NUCLEI, 2006, 69 (03) :418-432

[10]

Lugaro M., 2005, STARDUST METEORITES

← 1 2 3 4 →