Pygmy dipole resonance in 208Pb

被引：91

作者：

Poltoratska, I. ^{[1
]}

von Neumann-Cosel, P. ^{[1
]}

Tamii, A. ^{[2
]}

Adachi, T. ^{[3
,4
]}

Bertulani, C. A. ^{[5
]}

Carter, J. ^{[6
]}

Dozono, M. ^{[7
]}

Fujita, H. ^{[2
,7
]}

Fujita, K.

Fujita, Y. ^{[3
]}

Hatanaka, K. ^{[2
]}

Itoh, M. ^{[8
]}

Kawabata, T. ^{[9
]}

Kalmykov, Y. ^{[1
]}

Krumbholz, A. M. ^{[1
]}

Litvinova, E. ^{[10
,11
]}

Matsubara, H. ^{[12
]}

Nakanishi, K. ^{[12
]}

Neveling, R. ^{[13
]}

Okamura, H. ^{[2
]}

Ong, H. J. ^{[2
]}

Oezel-Tashenov, B.

Ponomarev, V. Yu. ^{[1
]}

Richter, A. ^{[1
,14
]}

Rubio, B. ^{[15
]}

Sakaguchi, H. ^{[2
]}

Sakemi, Y. ^{[8
]}

Sasamoto, Y. ^{[12
]}

Shimbara, Y. ^{[3
,16
]}

Shimizu, Y. ^{[17
]}

Smit, F. D. ^{[13
]}

Suzuki, T. ^{[2
]}

Tameshige, Y. ^{[18
]}

Wambach, J. ^{[1
]}

Yosoi, M. ^{[2
]}

Zenihiro, J. ^{[2
]}

机构：

[1] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany

[2] Osaka Univ, Res Ctr Nucl Phys, Osaka 5670047, Japan

[3] Osaka Univ, Dept Phys, Toyonaka, Osaka 5600043, Japan

[4] Univ Groningen, Kernfys Versneller Inst, NL-9747 AA Groningen, Netherlands

[5] Texas A&M Univ, Dept Phys & Astron, Commerce, TX 75429 USA

[6] Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa

[7] Kyushu Univ, Dept Phys, Fukuoka 8128581, Japan

[8] Tohoku Univ, Ctr Cyclotron & Radioisotope, Sendai, Miyagi 9808578, Japan

[9] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[10] GSI Helmholtzzentrum Schwerionenforsch, EMMI, D-64291 Darmstadt, Germany

[11] GSI Helmholtzzentrum Schwerionenforsch, Div Res, D-64291 Darmstadt, Germany

[12] Univ Tokyo, Ctr Nucl Study, Bunkyo Ku, Tokyo 1130033, Japan

[13] iThemba LABS, ZA-7129 Somerset W, South Africa

[14] ECT, I-38123 Villazzano, Trento, Italy

[15] Univ Valencia, CSIC, Inst Fis Corpuscular, E-46071 Valencia, Spain

[16] Niigata Univ, Dept Phys, Niigata 9502102, Japan

[17] RIKEN, Nishina Ctr, Wako, Saitama 3510198, Japan

[18] Natl Inst Radiol Sci, Chiba 2638555, Japan

来源：

PHYSICAL REVIEW C | 2012年 / 85卷 / 04期

关键词：

STRENGTH; MODES;

D O I：

10.1103/PhysRevC.85.041304

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

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 Pb-208 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 9MeV; that is, 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.

引用

页数：5

共 43 条

[1] Evidence for pygmy and giant dipole resonances in 130Sn and 132Sn -: art. no. 132501 [J].

Adrich, P ;

Klimkiewicz, A ;

Fallot, M ;

Boretzky, K ;

Aumann, T ;

Cortina-Gil, D ;

Pramanik, UD ;

Elze, TW ;

Emling, H ;

Geissel, H ;

Hellström, M ;

Jones, KL ;

Kratz, JV ;

Kulessa, R ;

Leifels, Y ;

Nociforo, C ;

Palit, R ;

Simon, H ;

Surówka, G ;

Sümmerer, K ;

Walus, W .

PHYSICAL REVIEW LETTERS, 2005, 95 (13)

[2] MEASUREMENTS OF GIANT DIPOLE RESONANCE WITH MONOENERGETIC PHOTONS [J].

BERMAN, BL ;

FULTZ, SC .

REVIEWS OF MODERN PHYSICS, 1975, 47 (03) :713-761

[3]

BERTULANI CA, 1985, NUCL PHYS A, V442, P739

[4] Double-octupole states in 208Pb [J].

Brown, BA .

PHYSICAL REVIEW LETTERS, 2000, 85 (25) :5300-5303

[5] Constraints on the symmetry energy and neutron skins from pygmy resonances in 68Ni and 132Sn [J].

Carbone, Andrea ;

Colo, Gianluca ;

Bracco, Angela ;

Cao, Li-Gang ;

Bortignon, Pier Francesco ;

Camera, Franco ;

Wieland, Oliver .

PHYSICAL REVIEW C, 2010, 81 (04)

[6]

Co' G, 2009, PHYS REV C, V80, DOI 10.1103/PhysRevC.80.014308

[7] Nuclear resonance fluorescence experiments on 204,206,207,208Pb up to 6.75 MeV [J].

Enders, J ;

von Brentano, P ;

Eberth, J ;

Fitzler, A ;

Fransen, C ;

Herzberg, RD ;

Kaiser, H ;

Käubler, L ;

von Neumann-Cosel, P ;

Pietralla, N ;

Ponomarev, VY ;

Richter, A ;

Schwengner, R ;

Wiedenhöver, I .

NUCLEAR PHYSICS A, 2003, 724 (3-4) :243-273

[8] Isospin Character of the Pygmy Dipole Resonance in 124Sn [J].

Endres, J. ;

Litvinova, E. ;

Savran, D. ;

Butler, P. A. ;

Harakeh, M. N. ;

Harissopulos, S. ;

Herzberg, R. -D. ;

Kruecken, R. ;

Lagoyannis, A. ;

Pietralla, N. ;

Ponomarev, V. Yu ;

Popescu, L. ;

Ring, P. ;

Scheck, M. ;

Sonnabend, K. ;

Stoica, V. I. ;

Wortche, H. J. ;

Zilges, A. .

PHYSICAL REVIEW LETTERS, 2010, 105 (21)

[9] Magnetic spectrometer Grand Raiden [J].

Fujiwara, M ;

Akimune, H ;

Daito, I ;

Fujimura, H ;

Fujita, Y ;

Hatanaka, K ;

Ikegami, H ;

Katayama, I ;

Nagayama, K ;

Matsuoka, N ;

Morinobu, S ;

Noro, T ;

Yoshimura, M ;

Sakaguchi, H ;

Sakemi, Y ;

Tamii, A ;

Yosoi, M .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1999, 422 (1-3) :484-488

[10]

Harakeh M N., 2001, Giant Resonances: Fundamental High-Frequency Modes of Nuclear Excitation

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