Pygmy dipole resonance in 124Sn populated by inelastic scattering of 17O

Pygmy dipole resonance in 124Sn populated by inelastic scattering of 17O

The γ decay from the high-lying states of 124Sn was measured using the inelastic scattering of 17O at 340 MeV. The emitted γ rays were detected with high resolution with the AGATA demonstrator array and the scattered ions were detected in two segmented ΔE–E silicon telescopes. The angular distributi...

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Main Authors: L. Pellegri, A. Bracco, F.C.L. Crespi, S. Leoni, F. Camera, E.G. Lanza, M. Kmiecik, A. Maj, R. Avigo, G. Benzoni, N. Blasi, C. Boiano, S. Bottoni, S. Brambilla, S. Ceruti, A. Giaz, B. Million, A.I. Morales, R. Nicolini, V. Vandone, O. Wieland, D. Bazzacco, P. Bednarczyk, M. Bellato, B. Birkenbach, D. Bortolato, B. Cederwall, L. Charles, M. Ciemala, G. De Angelis, P. Désesquelles, J. Eberth, E. Farnea, A. Gadea, R. Gernhäuser, A. Görgen, A. Gottardo, J. Grebosz, H. Hess, R. Isocrate, J. Jolie, D. Judson, A. Jungclaus, N. Karkour, M. Krzysiek, E. Litvinova, S. Lunardi, K. Mazurek, D. Mengoni, C. Michelagnoli, R. Menegazzo, P. Molini, D.R. Napoli, A. Pullia, B. Quintana, F. Recchia, P. Reiter, M.D. Salsac, B. Siebeck, S. Siem, J. Simpson, P.-A. Söderström, O. Stezowski, Ch. Theisen, C. Ur, J.J. Valiente Dobon, M. Zieblinski
Format: Article
Language:English
Published: Elsevier 2014-11-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269314005966
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author L. Pellegri
A. Bracco
F.C.L. Crespi
S. Leoni
F. Camera
E.G. Lanza
M. Kmiecik
A. Maj
R. Avigo
G. Benzoni
N. Blasi
C. Boiano
S. Bottoni
S. Brambilla
S. Ceruti
A. Giaz
B. Million
A.I. Morales
R. Nicolini
V. Vandone
O. Wieland
D. Bazzacco
P. Bednarczyk
M. Bellato
B. Birkenbach
D. Bortolato
B. Cederwall
L. Charles
M. Ciemala
G. De Angelis
P. Désesquelles
J. Eberth
E. Farnea
A. Gadea
R. Gernhäuser
A. Görgen
A. Gottardo
J. Grebosz
H. Hess
R. Isocrate
J. Jolie
D. Judson
A. Jungclaus
N. Karkour
M. Krzysiek
E. Litvinova
S. Lunardi
K. Mazurek
D. Mengoni
C. Michelagnoli
R. Menegazzo
P. Molini
D.R. Napoli
A. Pullia
B. Quintana
F. Recchia
P. Reiter
M.D. Salsac
B. Siebeck
S. Siem
J. Simpson
P.-A. Söderström
O. Stezowski
Ch. Theisen
C. Ur
J.J. Valiente Dobon
M. Zieblinski
spellingShingle L. Pellegri
A. Bracco
F.C.L. Crespi
S. Leoni
F. Camera
E.G. Lanza
M. Kmiecik
A. Maj
R. Avigo
G. Benzoni
N. Blasi
C. Boiano
S. Bottoni
S. Brambilla
S. Ceruti
A. Giaz
B. Million
A.I. Morales
R. Nicolini
V. Vandone
O. Wieland
D. Bazzacco
P. Bednarczyk
M. Bellato
B. Birkenbach
D. Bortolato
B. Cederwall
L. Charles
M. Ciemala
G. De Angelis
P. Désesquelles
J. Eberth
E. Farnea
A. Gadea
R. Gernhäuser
A. Görgen
A. Gottardo
J. Grebosz
H. Hess
R. Isocrate
J. Jolie
D. Judson
A. Jungclaus
N. Karkour
M. Krzysiek
E. Litvinova
S. Lunardi
K. Mazurek
D. Mengoni
C. Michelagnoli
R. Menegazzo
P. Molini
D.R. Napoli
A. Pullia
B. Quintana
F. Recchia
P. Reiter
M.D. Salsac
B. Siebeck
S. Siem
J. Simpson
P.-A. Söderström
O. Stezowski
Ch. Theisen
C. Ur
J.J. Valiente Dobon
M. Zieblinski
Pygmy dipole resonance in 124Sn populated by inelastic scattering of 17O
Physics Letters B
author_facet L. Pellegri
A. Bracco
F.C.L. Crespi
S. Leoni
F. Camera
E.G. Lanza
M. Kmiecik
A. Maj
R. Avigo
G. Benzoni
N. Blasi
C. Boiano
S. Bottoni
S. Brambilla
S. Ceruti
A. Giaz
B. Million
A.I. Morales
R. Nicolini
V. Vandone
O. Wieland
D. Bazzacco
P. Bednarczyk
M. Bellato
B. Birkenbach
D. Bortolato
B. Cederwall
L. Charles
M. Ciemala
G. De Angelis
P. Désesquelles
J. Eberth
E. Farnea
A. Gadea
R. Gernhäuser
A. Görgen
A. Gottardo
J. Grebosz
H. Hess
R. Isocrate
J. Jolie
D. Judson
A. Jungclaus
N. Karkour
M. Krzysiek
E. Litvinova
S. Lunardi
K. Mazurek
D. Mengoni
C. Michelagnoli
R. Menegazzo
P. Molini
D.R. Napoli
A. Pullia
B. Quintana
F. Recchia
P. Reiter
M.D. Salsac
B. Siebeck
S. Siem
J. Simpson
P.-A. Söderström
O. Stezowski
Ch. Theisen
C. Ur
J.J. Valiente Dobon
M. Zieblinski
author_sort L. Pellegri
title Pygmy dipole resonance in 124Sn populated by inelastic scattering of 17O
title_short Pygmy dipole resonance in 124Sn populated by inelastic scattering of 17O
title_full Pygmy dipole resonance in 124Sn populated by inelastic scattering of 17O
title_fullStr Pygmy dipole resonance in 124Sn populated by inelastic scattering of 17O
title_full_unstemmed Pygmy dipole resonance in 124Sn populated by inelastic scattering of 17O
title_sort pygmy dipole resonance in 124sn populated by inelastic scattering of 17o
publisher Elsevier
series Physics Letters B
issn 0370-2693
publishDate 2014-11-01
description The γ decay from the high-lying states of 124Sn was measured using the inelastic scattering of 17O at 340 MeV. The emitted γ rays were detected with high resolution with the AGATA demonstrator array and the scattered ions were detected in two segmented ΔE–E silicon telescopes. The angular distribution was measured both for the γ rays and the scattered 17O ions. An accumulation of E1 strength below the particle threshold was found and compared with previous data obtained with (γ,γ′) and (α,α′γ) reactions. The present results of elastic scattering, and excitation of E2 and E1 states were analysed using the DWBA approach. From this comprehensive description the isoscalar component of the 1− excited states was extracted. The obtained values are based on the comparison of the data with DWBA calculations including a form factor deduced using a microscopic transition density. Keywords: Low-lying electric dipole excitations, 124Sn, Isospin character
url http://www.sciencedirect.com/science/article/pii/S0370269314005966
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spelling doaj-a1a00926ff124f809925242c11ff929b2020-11-25T02:33:22ZengElsevierPhysics Letters B0370-26932014-11-01738519523Pygmy dipole resonance in 124Sn populated by inelastic scattering of 17OL. Pellegri0A. Bracco1F.C.L. Crespi2S. Leoni3F. Camera4E.G. Lanza5M. Kmiecik6A. Maj7R. Avigo8G. Benzoni9N. Blasi10C. Boiano11S. Bottoni12S. Brambilla13S. Ceruti14A. Giaz15B. Million16A.I. Morales17R. Nicolini18V. Vandone19O. Wieland20D. Bazzacco21P. Bednarczyk22M. Bellato23B. Birkenbach24D. Bortolato25B. Cederwall26L. Charles27M. Ciemala28G. De Angelis29P. Désesquelles30J. Eberth31E. Farnea32A. Gadea33R. Gernhäuser34A. Görgen35A. Gottardo36J. Grebosz37H. Hess38R. Isocrate39J. Jolie40D. Judson41A. Jungclaus42N. Karkour43M. Krzysiek44E. Litvinova45S. Lunardi46K. Mazurek47D. Mengoni48C. Michelagnoli49R. Menegazzo50P. Molini51D.R. Napoli52A. Pullia53B. Quintana54F. Recchia55P. Reiter56M.D. Salsac57B. Siebeck58S. Siem59J. Simpson60P.-A. Söderström61O. Stezowski62Ch. Theisen63C. Ur64J.J. Valiente Dobon65M. Zieblinski66INFN Sezione di Milano, I-20133 Milano, Italy; Dipartimento di Fisica, Università degli studi di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, Italy; Dipartimento di Fisica, Università degli studi di Milano, I-20133 Milano, Italy; Corresponding author at: Dipartimento di Fisica, Università degli studi di Milano, I-20133 Milano, Italy. Tel.: +39 02 50317252.INFN Sezione di Milano, I-20133 Milano, Italy; Dipartimento di Fisica, Università degli studi di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, Italy; Dipartimento di Fisica, Università degli studi di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, Italy; Dipartimento di Fisica, Università degli studi di Milano, I-20133 Milano, ItalyINFN Sezione di Catania, I-95123 Catania, ItalyThe Henryk Niewodniczański Institute of Nuclear Physics, PAN, 31-342 Krakow, PolandThe Henryk Niewodniczański Institute of Nuclear Physics, PAN, 31-342 Krakow, PolandINFN Sezione di Milano, I-20133 Milano, Italy; Dipartimento di Fisica, Università degli studi di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, Italy; Dipartimento di Fisica, Università degli studi di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, Italy; Dipartimento di Fisica, Università degli studi di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, Italy; Dipartimento di Fisica, Università degli studi di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, Italy; Dipartimento di Fisica, Università degli studi di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, Italy; Dipartimento di Fisica, Università degli studi di Milano, I-20133 Milano, ItalyINFN Sezione di Milano, I-20133 Milano, ItalyINFN Sezione di Padova, I-35131 Padova, ItalyThe Henryk Niewodniczański Institute of Nuclear Physics, PAN, 31-342 Krakow, PolandINFN Sezione di Padova, I-35131 Padova, ItalyInstitut für Kernphysik, Universität zu Köln, D-50937 Köln, GermanyINFN Sezione di Padova, I-35131 Padova, Italy; Dipartimento di Fisica e Astronomia, Università degli studi di Padova, I-35131 Padova, ItalyDepartment of Physics, Royal Institute of Technology, SE-10691 Stockholm, SwedenInstitut Pluridisciplinaire Hubert Curien – IPHC, CNRS/IN2P3 and Université de Strasbourg, BP 28, F-67037 Strasbourg Cedex 2, FranceThe Henryk Niewodniczański Institute of Nuclear Physics, PAN, 31-342 Krakow, PolandINFN, Laboratori Nazionali di Legnaro, I-35020 Padova, ItalyCentre de Spectrométrie Nucléaire et de Spectrométrie de Masse – CSNSM, CNRS/IN2P3 and Univ. Paris-Sud, F-91405 Orsay Campus, FranceInstitut für Kernphysik, Universität zu Köln, D-50937 Köln, GermanyINFN Sezione di Padova, I-35131 Padova, ItalyIFIC, CSIC, Universitat de València, E-46980 València, SpainPhysics Department E12, Technische Universität München, James-Franck-Straße. 1, D-85748 Garching, GermanyDepartment of Physics, University of Oslo, N-0316 Oslo, NorwayDipartimento di Fisica e Astronomia, Università degli studi di Padova, I-35131 Padova, Italy; INFN, Laboratori Nazionali di Legnaro, I-35020 Padova, ItalyThe Henryk Niewodniczański Institute of Nuclear Physics, PAN, 31-342 Krakow, PolandInstitut für Kernphysik, Universität zu Köln, D-50937 Köln, GermanyINFN Sezione di Padova, I-35131 Padova, ItalyInstitut für Kernphysik, Universität zu Köln, D-50937 Köln, GermanyOliver Lodge Laboratory, The University of Liverpool, Liverpool, L69 7ZE, UKInstituto de Estructura de la Materia, CSIC, E-28006 Madrid, SpainCentre de Spectrométrie Nucléaire et de Spectrométrie de Masse – CSNSM, CNRS/IN2P3 and Univ. Paris-Sud, F-91405 Orsay Campus, FranceThe Henryk Niewodniczański Institute of Nuclear Physics, PAN, 31-342 Krakow, PolandDepartment of Physics, Western Michigan University, Kalamazoo, MI 49008-5252, USA; National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824-1321, USAINFN Sezione di Padova, I-35131 Padova, Italy; Dipartimento di Fisica e Astronomia, Università degli studi di Padova, I-35131 Padova, ItalyThe Henryk Niewodniczański Institute of Nuclear Physics, PAN, 31-342 Krakow, PolandINFN Sezione di Padova, I-35131 Padova, Italy; Dipartimento di Fisica e Astronomia, Università degli studi di Padova, I-35131 Padova, ItalyINFN Sezione di Padova, I-35131 Padova, Italy; Dipartimento di Fisica e Astronomia, Università degli studi di Padova, I-35131 Padova, ItalyINFN Sezione di Padova, I-35131 Padova, Italy; Dipartimento di Fisica e Astronomia, Università degli studi di Padova, I-35131 Padova, ItalyINFN Sezione di Padova, I-35131 Padova, Italy; Dipartimento di Fisica e Astronomia, Università degli studi di Padova, I-35131 Padova, ItalyINFN, Laboratori Nazionali di Legnaro, I-35020 Padova, ItalyINFN Sezione di Milano, I-20133 Milano, Italy; Dipartimento di Fisica, Università degli studi di Milano, I-20133 Milano, ItalyLaboratorio de Radiaciones Ionizantes, Universidad de Salamanca, E-37008 Salamanca, SpainINFN Sezione di Padova, I-35131 Padova, Italy; Dipartimento di Fisica e Astronomia, Università degli studi di Padova, I-35131 Padova, ItalyInstitut für Kernphysik, Universität zu Köln, D-50937 Köln, GermanyInstitut de Recherche sur les lois Fondamentales de l'Univers – IRFU, CEA/DSM, Centre CEA de Saclay, F-91191 Gif-sur-Yvette Cedex, FranceInstitut für Kernphysik, Universität zu Köln, D-50937 Köln, GermanyDepartment of Physics, University of Oslo, N-0316 Oslo, NorwaySTFC Daresbury Laboratory, Daresbury, Warrington, WA4 4AD, UKDepartment of Physics and Astronomy, Uppsala University, SE-75120 Uppsala, SwedenUniversité de Lyon, F-69622 Lyon, France; Université Lyon 1, Villeurbanne, France; CNRS/IN2P3, UMR5822, IPNL, FranceInstitut de Recherche sur les lois Fondamentales de l'Univers – IRFU, CEA/DSM, Centre CEA de Saclay, F-91191 Gif-sur-Yvette Cedex, FranceINFN Sezione di Padova, I-35131 Padova, ItalyINFN, Laboratori Nazionali di Legnaro, I-35020 Padova, ItalyThe Henryk Niewodniczański Institute of Nuclear Physics, PAN, 31-342 Krakow, PolandThe γ decay from the high-lying states of 124Sn was measured using the inelastic scattering of 17O at 340 MeV. The emitted γ rays were detected with high resolution with the AGATA demonstrator array and the scattered ions were detected in two segmented ΔE–E silicon telescopes. The angular distribution was measured both for the γ rays and the scattered 17O ions. An accumulation of E1 strength below the particle threshold was found and compared with previous data obtained with (γ,γ′) and (α,α′γ) reactions. The present results of elastic scattering, and excitation of E2 and E1 states were analysed using the DWBA approach. From this comprehensive description the isoscalar component of the 1− excited states was extracted. The obtained values are based on the comparison of the data with DWBA calculations including a form factor deduced using a microscopic transition density. Keywords: Low-lying electric dipole excitations, 124Sn, Isospin characterhttp://www.sciencedirect.com/science/article/pii/S0370269314005966

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