1
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Weinert M, Spieker M, Potel G, Tsoneva N, Müscher M, Wilhelmy J, Zilges A. Microscopic Structure of the Low-Energy Electric Dipole Response of ^{120}Sn. PHYSICAL REVIEW LETTERS 2021; 127:242501. [PMID: 34951807 DOI: 10.1103/physrevlett.127.242501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 09/07/2021] [Accepted: 10/28/2021] [Indexed: 06/14/2023]
Abstract
The microscopic structure of the low-energy electric dipole response, commonly denoted as pygmy dipole resonance (PDR), was studied for ^{120}Sn in a ^{119}Sn(d,pγ)^{120}Sn experiment. Unprecedented access to the single-particle structure of excited 1^{-} states below and around the neutron-separation threshold was obtained by comparing experimental data to predictions from a novel theoretical approach. The novel approach combines detailed structure input from energy-density functional plus quasiparticle-phonon model theory with reaction theory to obtain a consistent description of both the structure and reaction aspects of the process. The presented results show that the understanding of one-particle-one-hole structures of the 1^{-} states in the PDR region is crucial to reliably predict properties of the PDR and its contribution to nucleosynthesis processes.
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Affiliation(s)
- M Weinert
- Institute for Nuclear Physics, University of Cologne, 50937 Köln, Germany
| | - M Spieker
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - G Potel
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - N Tsoneva
- Extreme Light Infrastructure (ELI-NP), Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), Bucharest-Măgurele RO-077125, Romania
| | - M Müscher
- Institute for Nuclear Physics, University of Cologne, 50937 Köln, Germany
| | - J Wilhelmy
- Institute for Nuclear Physics, University of Cologne, 50937 Köln, Germany
| | - A Zilges
- Institute for Nuclear Physics, University of Cologne, 50937 Köln, Germany
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2
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Spieker M, Heusler A, Brown BA, Faestermann T, Hertenberger R, Potel G, Scheck M, Tsoneva N, Weinert M, Wirth HF, Zilges A. Accessing the Single-Particle Structure of the Pygmy Dipole Resonance in ^{208}Pb. PHYSICAL REVIEW LETTERS 2020; 125:102503. [PMID: 32955313 DOI: 10.1103/physrevlett.125.102503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Accepted: 07/28/2020] [Indexed: 06/11/2023]
Abstract
New experimental data on the neutron single-particle character of the Pygmy Dipole Resonance (PDR) in ^{208}Pb are presented. They were obtained from (d,p) and resonant proton scattering experiments performed at the Q3D spectrograph of the Maier-Leibnitz Laboratory in Garching, Germany. The new data are compared to the large suite of complementary, experimental data available for ^{208}Pb and establish (d,p) as an additional, valuable, experimental probe to study the PDR and its collectivity. Besides the single-particle character of the states, different features of the strength distributions are discussed and compared to large-scale shell model (LSSM) and energy-density functional plus quasiparticle-phonon model theoretical approaches to elucidate the microscopic structure of the PDR in ^{208}Pb.
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Affiliation(s)
- M Spieker
- Department of Physics, Florida State University, Tallahassee, Florida 32306, USA
| | - A Heusler
- Niebuhr-Str. 19c, Berlin D-10629, Germany
| | - B A Brown
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
- Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
| | - T Faestermann
- Physik Department, Technische Universität München, Garching D-85748, Germany
| | - R Hertenberger
- Fakultät für Physik, Ludwig-Maximilians-Universität München, Garching D-85748, Germany
| | - G Potel
- Lawrence Livermore National Laboratory, Livermore, California 94550, USA
| | - M Scheck
- School of Computing, Engineering, and Physical Sciences, University of the West of Scotland, Paisley PA1 2BE, United Kingdom
- SUPA, Scottish Universities Physics Alliance, United Kingdom
| | - N Tsoneva
- Extreme Light Infrastructure (ELI-NP), Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN-HH), Bucharest-Măgurele RO-077125, Romania
| | - M Weinert
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, Köln D-50937, Germany
| | - H-F Wirth
- Fakultät für Physik, Ludwig-Maximilians-Universität München, Garching D-85748, Germany
| | - A Zilges
- Institut für Kernphysik, Universität zu Köln, Zülpicher Straße 77, Köln D-50937, Germany
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3
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Litvinova E, Schuck P, Wibowo H. Nuclear response at zero and finite temperature. EPJ WEB OF CONFERENCES 2019. [DOI: 10.1051/epjconf/201922301033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present some recent developments on the nuclear many-body problem, such as the treatment of high-order correlations and finite temperature in the description of in-medium two-nucleon propagators. In this work we discuss two-time propagators of the particle-hole type, which describe the response of finite nuclei to external probes without nucleon transfer. The general theory is formulated in terms of the equation of motion method for these propagators with the only input from the bare nucleon-nucleon interaction. The numerical implementation was performed on the basis of the effective mason-nucleon Lagrangian in order to study the energy-dependent kernels of different complexity. The finite-temperature extension of the theory with ph ⊗ phonon configurations is applied to a study of the multipole response of medium-mass nuclei.
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Litvinova E, Wibowo H. Finite-Temperature Relativistic Nuclear Field Theory: An Application to the Dipole Response. PHYSICAL REVIEW LETTERS 2018; 121:082501. [PMID: 30192567 DOI: 10.1103/physrevlett.121.082501] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 07/11/2018] [Indexed: 06/08/2023]
Abstract
Nuclear response theory beyond the one-loop approximation is formulated for the case of finite temperature. For this purpose, the time blocking approximation to the time-dependent part of the in-medium nucleon-nucleon interaction amplitude is adopted for the thermal (imaginary-time) Green's function formalism. We found that introducing a soft blocking, instead of a sharp blocking at zero temperature, brings the Bethe-Salpeter equation to a single-frequency variable equation also at finite temperatures. The method is implemented self-consistently in the framework of quantum hadrodynamics and designed to connect the high-energy scale of heavy mesons and the low-energy domain of nuclear medium polarization effects in a parameter-free way. In this framework, we investigate the temperature dependence of dipole spectra in the even-even nuclei ^{48}Ca and ^{100,120,132}Sn with a special focus on the giant dipole resonance's width problem and on the low-energy dipole strength distribution.
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Affiliation(s)
- Elena Litvinova
- Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008, USA
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824, USA
| | - Herlik Wibowo
- Department of Physics, Western Michigan University, Kalamazoo, Michigan 49008, USA
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5
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Abstract
We discuss some special aspects of the nuclear many-body problem related to isospin transfer. The major quantity of interest is the in-medium propagator of a particlehole configuration of the proton-neutron character, which determines the nuclear response to isospin transferring external fields. One of the most studied excitation modes is the Gamow-Teller resonance (GTR), which can, therefore, be used as a sensitive test for the theoretical approaches. Its low-energy part, which is responsible for the beta decay halflives, is especially convenient for this. Models benchmarked against the GTR can be used to predict other, more exotic, excitations studied at nuclear rare isotope beam facilities and in astrophysics. As far as the precision is concerned, the major problem in such an analysis is to disentangle the effects related to the underlying interaction and those caused by the many-body correlations. Therefore, approaches (i) based on fundamental concepts for the nucleon-nucleon interaction which (ii) include complex many-body dynamics are the preferred ones. We discuss progress and obstacles on the way to such approaches.
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6
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Scheck M, Mishev S, Ponomarev VY, Chapman R, Gaffney LP, Gregor ET, Pietralla N, Spagnoletti P, Savran D, Simpson GS. Investigating the Pygmy Dipole Resonance Using β Decay. PHYSICAL REVIEW LETTERS 2016; 116:132501. [PMID: 27081972 DOI: 10.1103/physrevlett.116.132501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/30/2015] [Indexed: 06/05/2023]
Abstract
In this contribution it is explored whether γ-ray spectroscopy following β decay with high Q values from mother nuclei with low ground-state spin can be exploited as a probe for the pygmy dipole resonance. The suitability of this approach is demonstrated by a comparison between data from photon scattering, ^{136}Xe(γ,γ^{'}), and ^{136}I [J_{0}^{π}=(1^{-})]→^{136}Xe^{*} β-decay data. It is demonstrated that β decay populates 1^{-} levels associated with the pygmy dipole resonance, but only a fraction of those. The complementary insight into the wave functions probed by β decay is elucidated by calculations within the quasiparticle phonon model. It is demonstrated that β decay dominantly populates complex configurations, which are only weakly excited in inelastic scattering experiments.
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Affiliation(s)
- M Scheck
- School of Engineering and Computing, University of the West of Scotland, Paisley PA1 2BE, United Kingdom
- SUPA, Scottish Universities Physics Alliance, Glasgow G12 8QQ, United Kingdom
| | - S Mishev
- JINR, Joint Institute for Nuclear Research, Dubna 141980, Russia
- Institute for Advanced Physical Studies, New Bulgarian University, Sofia 1618, Bulgaria
| | - V Yu Ponomarev
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - R Chapman
- School of Engineering and Computing, University of the West of Scotland, Paisley PA1 2BE, United Kingdom
- SUPA, Scottish Universities Physics Alliance, Glasgow G12 8QQ, United Kingdom
| | - L P Gaffney
- School of Engineering and Computing, University of the West of Scotland, Paisley PA1 2BE, United Kingdom
- SUPA, Scottish Universities Physics Alliance, Glasgow G12 8QQ, United Kingdom
| | - E T Gregor
- School of Engineering and Computing, University of the West of Scotland, Paisley PA1 2BE, United Kingdom
- SUPA, Scottish Universities Physics Alliance, Glasgow G12 8QQ, United Kingdom
| | - N Pietralla
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - P Spagnoletti
- School of Engineering and Computing, University of the West of Scotland, Paisley PA1 2BE, United Kingdom
- SUPA, Scottish Universities Physics Alliance, Glasgow G12 8QQ, United Kingdom
| | - D Savran
- ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung, D-64291 Darmstadt, Germany
| | - G S Simpson
- School of Engineering and Computing, University of the West of Scotland, Paisley PA1 2BE, United Kingdom
- SUPA, Scottish Universities Physics Alliance, Glasgow G12 8QQ, United Kingdom
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7
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Pellegri L, Bracco A, Crespi F. Low-lying 1 −and 2 +states in 124Sn via inelastic scattering of 17O. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201611704006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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8
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Lanza E, Vitturi A, Andrés M, Catara F. Microscopic nuclear form factor for the pygmy dipole resonance. EPJ WEB OF CONFERENCES 2016. [DOI: 10.1051/epjconf/201611706017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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9
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Nesterenko V, Repko A, Reinhard PG, Kvasil J. Relation of E1 pygmy and toroidal resonances. EPJ WEB OF CONFERENCES 2015. [DOI: 10.1051/epjconf/20159301020] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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10
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Derya V, Endres J, Harakeh M, Savran D, Spieker M, Wörtche H, Zilges A. Study of the isospin character of 1 -states using hadronic probes at intermediate energies. EPJ WEB OF CONFERENCES 2015. [DOI: 10.1051/epjconf/20159301041] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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11
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Litvinova E. Isospin transfer modes in exotic nuclei. EPJ WEB OF CONFERENCES 2015. [DOI: 10.1051/epjconf/20159301019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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12
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Werner V, Cooper N, Goddard P, Humby P, Ilieva R, Rusev G, Beller J, Bernards C, Crider B, Isaak J, Kelley J, Kwan E, Löher B, Peters E, Pietralla N, Romig C, Savran D, Scheck M, Tonchev A, Tornow W, Yates S, Zweidinger M. Dipole strength distributions from HIGS Experiments. EPJ WEB OF CONFERENCES 2015. [DOI: 10.1051/epjconf/20159301031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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13
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Lo Iudice N, Knapp F, Vesely P, Andreozzi F, De Gregorio G, Porrino A. Dipole response in neutron-rich nuclei within self-consistent approaches using realistic potentials. EPJ WEB OF CONFERENCES 2015. [DOI: 10.1051/epjconf/20159301018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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14
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Zilges A, Savran D. The Pygmy Dipole Resonance – past, presence, and future. EPJ WEB OF CONFERENCES 2015. [DOI: 10.1051/epjconf/20159301028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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15
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Crespi FCL, Bracco A, Nicolini R, Mengoni D, Pellegri L, Lanza EG, Leoni S, Maj A, Kmiecik M, Avigo R, Benzoni G, Blasi N, Boiano C, Bottoni S, Brambilla S, Camera F, Ceruti S, Giaz A, Million B, Morales AI, Vandone V, Wieland O, Bednarczyk P, Ciemała M, Grebosz J, Krzysiek M, Mazurek K, Zieblinski M, Bazzacco D, Bellato M, Birkenbach B, Bortolato D, Calore E, Cederwall B, Charles L, de Angelis G, Désesquelles P, Eberth J, Farnea E, Gadea A, Görgen A, Gottardo A, Isocrate R, Jolie J, Jungclaus A, Karkour N, Korten W, Menegazzo R, Michelagnoli C, Molini P, Napoli DR, Pullia A, Recchia F, Reiter P, Rosso D, Sahin E, Salsac MD, Siebeck B, Siem S, Simpson J, Söderström PA, Stezowski O, Theisen C, Ur C, Valiente-Dobón JJ. Isospin character of low-lying pygmy dipole states in 208Pb via inelastic scattering of 17O ions. PHYSICAL REVIEW LETTERS 2014; 113:012501. [PMID: 25032921 DOI: 10.1103/physrevlett.113.012501] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Indexed: 06/03/2023]
Abstract
The properties of pygmy dipole states in 208Pb were investigated using the 208Pb(17O, 17O'γ) reaction at 340 MeV and measuring the γ decay with high resolution with the AGATA demonstrator array. Cross sections and angular distributions of the emitted γ rays and of the scattered particles were measured. The results are compared with (γ, γ') and (p, p') data. The data analysis with the distorted wave Born approximation approach gives a good description of the elastic scattering and of the inelastic excitation of the 2+ and 3- states. For the dipole transitions a form factor obtained by folding a microscopically calculated transition density was used for the first time. This has allowed us to extract the isoscalar component of the 1- excited states from 4 to 8 MeV.
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Affiliation(s)
- F C L Crespi
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy and INFN, Sezione di Milano, I-20133 Milano, Italy
| | - A Bracco
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy and INFN, Sezione di Milano, I-20133 Milano, Italy
| | - R Nicolini
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy and INFN, Sezione di Milano, I-20133 Milano, Italy
| | - D Mengoni
- Dipartimento di Fisica dell'Università degli Studi di Padova, I-35131 Padova, Italy and INFN, Sezione di Padova, I-35131 Padova, Italy
| | - L Pellegri
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy and INFN, Sezione di Milano, I-20133 Milano, Italy
| | - E G Lanza
- INFN, Sezione di Catania, I-95123 Catania, Italy
| | - S Leoni
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy and INFN, Sezione di Milano, I-20133 Milano, Italy
| | - A Maj
- The Niewodniczanski Institute of Nuclear Physics, PAN, 31-342 Krakow, Poland
| | - M Kmiecik
- The Niewodniczanski Institute of Nuclear Physics, PAN, 31-342 Krakow, Poland
| | - R Avigo
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy and INFN, Sezione di Milano, I-20133 Milano, Italy
| | - G Benzoni
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - N Blasi
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - C Boiano
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - S Bottoni
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy and INFN, Sezione di Milano, I-20133 Milano, Italy
| | - S Brambilla
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - F Camera
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy and INFN, Sezione di Milano, I-20133 Milano, Italy
| | - S Ceruti
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy and INFN, Sezione di Milano, I-20133 Milano, Italy
| | - A Giaz
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - B Million
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - A I Morales
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy and INFN, Sezione di Milano, I-20133 Milano, Italy
| | - V Vandone
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy and INFN, Sezione di Milano, I-20133 Milano, Italy
| | - O Wieland
- INFN, Sezione di Milano, I-20133 Milano, Italy
| | - P Bednarczyk
- The Niewodniczanski Institute of Nuclear Physics, PAN, 31-342 Krakow, Poland
| | - M Ciemała
- The Niewodniczanski Institute of Nuclear Physics, PAN, 31-342 Krakow, Poland
| | - J Grebosz
- The Niewodniczanski Institute of Nuclear Physics, PAN, 31-342 Krakow, Poland
| | - M Krzysiek
- The Niewodniczanski Institute of Nuclear Physics, PAN, 31-342 Krakow, Poland
| | - K Mazurek
- The Niewodniczanski Institute of Nuclear Physics, PAN, 31-342 Krakow, Poland
| | - M Zieblinski
- The Niewodniczanski Institute of Nuclear Physics, PAN, 31-342 Krakow, Poland
| | - D Bazzacco
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - M Bellato
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - B Birkenbach
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - D Bortolato
- Dipartimento di Fisica dell'Università degli Studi di Padova, I-35131 Padova, Italy and INFN, Sezione di Padova, I-35131 Padova, Italy
| | - E Calore
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - B Cederwall
- Department of Physics, Royal Institute of Technology, SE-10691 Stockholm, Sweden
| | - L Charles
- Institut Pluridisciplinaire Hubert Curien IPHC, CNRS/IN2P3 and Université de Strasbourg BP 28, F-67037 Strasbourg Cedex 2, France
| | - G de Angelis
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - P Désesquelles
- Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse CSNSM, CNRS/IN2P3 and Université Paris-Sud, F-91405 Orsay Campus, France
| | - J Eberth
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - E Farnea
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - A Gadea
- IFIC, CSIC-Universitat de València, E-46980 Valéncia, Spain
| | - A Görgen
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
| | - A Gottardo
- Dipartimento di Fisica dell'Università degli Studi di Padova, I-35131 Padova, Italy and INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - R Isocrate
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - J Jolie
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - A Jungclaus
- Instituto de Estructura de la Materia, CSIC, Madrid, E-28006 Madrid, Spain
| | - N Karkour
- Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse CSNSM, CNRS/IN2P3 and Université Paris-Sud, F-91405 Orsay Campus, France
| | - W Korten
- Institut de Recherche sur les lois Fondamentales de l'Univers IRFU, CEA/DSM, Centre CEA de Saclay, F-91191 Gif-sur-Yvette Cedex, France
| | - R Menegazzo
- INFN, Sezione di Padova, I-35131 Padova, Italy
| | - C Michelagnoli
- Dipartimento di Fisica dell'Università degli Studi di Padova, I-35131 Padova, Italy and INFN, Sezione di Padova, I-35131 Padova, Italy
| | - P Molini
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - D R Napoli
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - A Pullia
- Dipartimento di Fisica dell'Università degli Studi di Milano, I-20133 Milano, Italy and INFN, Sezione di Milano, I-20133 Milano, Italy
| | - F Recchia
- Dipartimento di Fisica dell'Università degli Studi di Padova, I-35131 Padova, Italy and INFN, Sezione di Padova, I-35131 Padova, Italy
| | - P Reiter
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - D Rosso
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - E Sahin
- INFN, Laboratori Nazionali di Legnaro, Legnaro I-35020, Italy
| | - M D Salsac
- Institut de Recherche sur les lois Fondamentales de l'Univers IRFU, CEA/DSM, Centre CEA de Saclay, F-91191 Gif-sur-Yvette Cedex, France
| | - B Siebeck
- Institut für Kernphysik, Universität zu Köln, D-50937 Köln, Germany
| | - S Siem
- Department of Physics, University of Oslo, N-0316 Oslo, Norway
| | - J Simpson
- STFC Daresbury Laboratory, Daresbury, Warrington, WA4 4AD, United Kingdom
| | - P-A Söderström
- Department of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, Sweden
| | - O Stezowski
- Université de Lyon, F-69622, Lyon, France and Université Lyon 1, Villeurbanne; CNRS/IN2P3, UMR5822, IPNL, France
| | - Ch Theisen
- Institut de Recherche sur les lois Fondamentales de l'Univers IRFU, CEA/DSM, Centre CEA de Saclay, F-91191 Gif-sur-Yvette Cedex, France
| | - C Ur
- INFN, Sezione di Padova, I-35131 Padova, Italy
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16
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Baran V, Colonna M, Di Toro M, Croitoru A, Dumitru D. Collective features of nuclear dynamics with exotic nuclei within microscopic transport models. EPJ WEB OF CONFERENCES 2014. [DOI: 10.1051/epjconf/20146603004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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17
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Bracco A, Ceruti S, Pellegri L. Nuclear Structure aspects of gamma decay from giant resonances. EPJ WEB OF CONFERENCES 2014. [DOI: 10.1051/epjconf/20147806002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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18
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Khan E. Recent progress in EDF-based methods applied to nuclear properties. EPJ WEB OF CONFERENCES 2014. [DOI: 10.1051/epjconf/20146601009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Savran D. Experimental results on the Pygmy Dipole Resonance. EPJ WEB OF CONFERENCES 2014. [DOI: 10.1051/epjconf/20146602094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Crespi F, Kmiecik M, Bracco A, Leoni S, Maj A, Benzoni G, Blasi N, Boiano C, Bottoni S, Brambilla S, Camera F, Ceruti S, Giaz A, Million B, Morales A, Nicolini R, Pellegri L, Riboldi S, Vandone V, Wieland O, Bednarczyk P, Ciemala M, Grebosz J, Krzysiek M, Mazurek K, Zieblinski M, Bazzacco D, Bellato M, Birkenbach B, Bortolato D, Calore E, Angelis GD, Farnea E, Gadea A, Görgen A, Gottardo A, Isocrate R, Lenzi S, Lunardi S, Mengoni D, Michelagnoli C, Molini P, Napoli D, Recchia F, Sahin E, Siebeck B, Siem S, Ur C, Dobon JV. Study of the γdecay of high-lying states in 208Pb via inelastic scattering of 17O ions. EPJ WEB OF CONFERENCES 2014. [DOI: 10.1051/epjconf/20146602023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rossi DM, Adrich P, Aksouh F, Alvarez-Pol H, Aumann T, Benlliure J, Böhmer M, Boretzky K, Casarejos E, Chartier M, Chatillon A, Cortina-Gil D, Datta Pramanik U, Emling H, Ershova O, Fernandez-Dominguez B, Geissel H, Gorska M, Heil M, Johansson HT, Junghans A, Kelic-Heil A, Kiselev O, Klimkiewicz A, Kratz JV, Krücken R, Kurz N, Labiche M, Le Bleis T, Lemmon R, Litvinov YA, Mahata K, Maierbeck P, Movsesyan A, Nilsson T, Nociforo C, Palit R, Paschalis S, Plag R, Reifarth R, Savran D, Scheit H, Simon H, Sümmerer K, Wagner A, Waluś W, Weick H, Winkler M. Measurement of the dipole polarizability of the unstable neutron-rich nucleus 68Ni. PHYSICAL REVIEW LETTERS 2013; 111:242503. [PMID: 24483648 DOI: 10.1103/physrevlett.111.242503] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Indexed: 06/03/2023]
Abstract
The E1 strength distribution in 68Ni has been investigated using Coulomb excitation in inverse kinematics at the R3B-LAND setup and by measuring the invariant mass in the one- and two-neutron decay channels. The giant dipole resonance and a low-lying peak (pygmy dipole resonance) have been observed at 17.1(2) and 9.55(17) MeV, respectively. The measured dipole polarizability is compared to relativistic random phase approximation calculations yielding a neutron-skin thickness of 0.17(2) fm. A method and analysis applicable to neutron-rich nuclei has been developed, allowing for a precise determination of neutron skins in nuclei as a function of neutron excess.
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Affiliation(s)
- D M Rossi
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Kernchemie, Johannes Gutenberg-Universität, D-55128 Mainz, Germany
| | - P Adrich
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - F Aksouh
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - H Alvarez-Pol
- University of Santiago de Compostela, E-15705 Santiago de Compostela, Spain
| | - T Aumann
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - J Benlliure
- University of Santiago de Compostela, E-15705 Santiago de Compostela, Spain
| | - M Böhmer
- Physik-Department E12, Technische Universität München, D-85748 Garching, Germany
| | - K Boretzky
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | | | - M Chartier
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - A Chatillon
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - D Cortina-Gil
- University of Santiago de Compostela, E-15705 Santiago de Compostela, Spain
| | | | - H Emling
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - O Ershova
- Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany
| | - B Fernandez-Dominguez
- University of Santiago de Compostela, E-15705 Santiago de Compostela, Spain and University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - H Geissel
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - M Gorska
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - M Heil
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - H T Johansson
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Chalmers University of Technology, SE-41296 Göteborg, Sweden
| | - A Junghans
- Helmholtz-Zentrum Dresden-Rossendorf e.V., D-01328 Dresden, Germany
| | - A Kelic-Heil
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - O Kiselev
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Kernchemie, Johannes Gutenberg-Universität, D-55128 Mainz, Germany
| | - A Klimkiewicz
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Jagiellonian University, PL-30-059 Krakow, Poland
| | - J V Kratz
- Institut für Kernchemie, Johannes Gutenberg-Universität, D-55128 Mainz, Germany
| | - R Krücken
- Physik-Department E12, Technische Universität München, D-85748 Garching, Germany
| | - N Kurz
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - M Labiche
- University of the West of Scotland, Paisley PA1 2BE, United Kingdom and STFC Daresbury Laboratory, Warrington WA4 4AD, United Kingdom
| | - T Le Bleis
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany and Institut Pluridisciplinaire Hubert Curien, F-67037 Strasbourg, France
| | - R Lemmon
- STFC Daresbury Laboratory, Warrington WA4 4AD, United Kingdom
| | - Yu A Litvinov
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - K Mahata
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Bhabha Atomic Research Centre, Mumbai 400-085, India
| | - P Maierbeck
- Physik-Department E12, Technische Universität München, D-85748 Garching, Germany
| | - A Movsesyan
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - T Nilsson
- Chalmers University of Technology, SE-41296 Göteborg, Sweden
| | - C Nociforo
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - R Palit
- Tata Institute of Fundamental Research, Mumbai 400-005, India
| | - S Paschalis
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany and University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - R Plag
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany
| | - R Reifarth
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Institut für Angewandte Physik, Goethe Universität, D-60438 Frankfurt am Main, Germany
| | - D Savran
- ExtreMe Matter Institute EMMI and Research Division, GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany and Frankfurt Institute for Advanced Studies, D-60438 Frankfurt am Main, Germany
| | - H Scheit
- Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany
| | - H Simon
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - K Sümmerer
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - A Wagner
- Helmholtz-Zentrum Dresden-Rossendorf e.V., D-01328 Dresden, Germany
| | - W Waluś
- Jagiellonian University, PL-30-059 Krakow, Poland
| | - H Weick
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
| | - M Winkler
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, D-64291 Darmstadt, Germany
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Bracco A, Crespi F. Study of the γ decay of high-lying states in208Pb via inelastic scattering of17O ions. EPJ WEB OF CONFERENCES 2012. [DOI: 10.1051/epjconf/20123803001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Tsoneva N, Lenske H. Nuclear pygmy modes and the dynamics of the nuclear skin. EPJ WEB OF CONFERENCES 2012. [DOI: 10.1051/epjconf/20123803002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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