Mapping the demise of collective motion in nuclei at high excitation energy

Mapping the demise of collective motion in nuclei at high excitation energy

High energy gamma-rays from the 116Sn + 24Mg reaction at 23A MeV were measured using the MEDEA detector at LNS – INFN Catania. Combining this new data with previous measurements yields a detailed view of the quenching of the Giant Dipole Resonance as a function of excitation energy in nuclei of mass...

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Main Authors: D. Santonocito, Y. Blumenfeld, C. Maiolino, C. Agodi, R. Alba, G. Bellia, R. Coniglione, A. Del Zoppo, F. Hongmei, E. Migneco, P. Piattelli, P. Sapienza, L. Auditore, G. Cardella, E. De Filippo, E. La Guidara, C. Monrozeau, M. Papa, S. Pirrone, F. Rizzo, A. Trifiró, M. Trimarchi, H.X. Huang, O. Wieland
Format: Article
Language:English
Published: Elsevier 2018-07-01
Series:Physics Letters B
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269318304167
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spelling doaj-14dbbbab4c084910ac2b5f628870f2972020-11-25T01:17:22ZengElsevierPhysics Letters B0370-26932018-07-01782427432Mapping the demise of collective motion in nuclei at high excitation energyD. Santonocito0Y. Blumenfeld1C. Maiolino2C. Agodi3R. Alba4G. Bellia5R. Coniglione6A. Del Zoppo7F. Hongmei8E. Migneco9P. Piattelli10P. Sapienza11L. Auditore12G. Cardella13E. De Filippo14E. La Guidara15C. Monrozeau16M. Papa17S. Pirrone18F. Rizzo19A. Trifiró20M. Trimarchi21H.X. Huang22O. Wieland23INFN – Laboratori Nazionali del Sud, via S. Sofia 62, I-95123, Catania, Italy; Corresponding author.Institut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay Cedex, FranceINFN – Laboratori Nazionali del Sud, via S. Sofia 62, I-95123, Catania, ItalyINFN – Laboratori Nazionali del Sud, via S. Sofia 62, I-95123, Catania, ItalyINFN – Laboratori Nazionali del Sud, via S. Sofia 62, I-95123, Catania, ItalyINFN – Laboratori Nazionali del Sud, via S. Sofia 62, I-95123, Catania, Italy; Dipartimento di Fisica e Astronomia dell'Universitá di Catania, via S. Sofia 64, I-95123, Catania, ItalyINFN – Laboratori Nazionali del Sud, via S. Sofia 62, I-95123, Catania, ItalyINFN – Laboratori Nazionali del Sud, via S. Sofia 62, I-95123, Catania, ItalyINFN – Laboratori Nazionali del Sud, via S. Sofia 62, I-95123, Catania, ItalyINFN – Laboratori Nazionali del Sud, via S. Sofia 62, I-95123, Catania, Italy; Dipartimento di Fisica e Astronomia dell'Universitá di Catania, via S. Sofia 64, I-95123, Catania, ItalyINFN – Laboratori Nazionali del Sud, via S. Sofia 62, I-95123, Catania, ItalyINFN – Laboratori Nazionali del Sud, via S. Sofia 62, I-95123, Catania, ItalyINFN – Sezione di Catania, via S. Sofia 64, I-95123, Catania, Italy; INFN – Dipartimento di Scienze MIFT dell'Universitá di Messina, V.le F. Stagno d'Alcontres 31, I-98166, S. Agata, Messina, ItalyINFN – Sezione di Catania, via S. Sofia 64, I-95123, Catania, ItalyINFN – Sezione di Catania, via S. Sofia 64, I-95123, Catania, ItalyINFN – Sezione di Catania, via S. Sofia 64, I-95123, Catania, ItalyInstitut de Physique Nucléaire, CNRS-IN2P3, Université Paris-Sud, Université Paris-Saclay, F-91406 Orsay Cedex, FranceINFN – Sezione di Catania, via S. Sofia 64, I-95123, Catania, ItalyINFN – Sezione di Catania, via S. Sofia 64, I-95123, Catania, ItalyINFN – Laboratori Nazionali del Sud, via S. Sofia 62, I-95123, Catania, Italy; Dipartimento di Fisica e Astronomia dell'Universitá di Catania, via S. Sofia 64, I-95123, Catania, ItalyINFN – Sezione di Catania, via S. Sofia 64, I-95123, Catania, Italy; INFN – Dipartimento di Scienze MIFT dell'Universitá di Messina, V.le F. Stagno d'Alcontres 31, I-98166, S. Agata, Messina, ItalyINFN – Sezione di Catania, via S. Sofia 64, I-95123, Catania, Italy; INFN – Dipartimento di Scienze MIFT dell'Universitá di Messina, V.le F. Stagno d'Alcontres 31, I-98166, S. Agata, Messina, ItalyKey Laboratory of Science and Technology for National Defence, China Institute of Atomic Energy, P.O. Box 275(46), Beijing 102413, ChinaINFN – Sezione di Milano, via Celoria 16, I-20133, Milano, ItalyHigh energy gamma-rays from the 116Sn + 24Mg reaction at 23A MeV were measured using the MEDEA detector at LNS – INFN Catania. Combining this new data with previous measurements yields a detailed view of the quenching of the Giant Dipole Resonance as a function of excitation energy in nuclei of mass A in the range 120÷132. The transition towards the disappearance of the dipole strength, which occurs around 230 MeV excitation energy, appears to be remarkably sharp. Current phenomenological models give qualitative explanations for the quenching but cannot reproduce its detailed features. Keywords: Giant Dipole Resonance, Hot nuclei, Fusion reactions, Statistical Modelhttp://www.sciencedirect.com/science/article/pii/S0370269318304167
collection DOAJ
language English
format Article
sources DOAJ
author D. Santonocito
Y. Blumenfeld
C. Maiolino
C. Agodi
R. Alba
G. Bellia
R. Coniglione
A. Del Zoppo
F. Hongmei
E. Migneco
P. Piattelli
P. Sapienza
L. Auditore
G. Cardella
E. De Filippo
E. La Guidara
C. Monrozeau
M. Papa
S. Pirrone
F. Rizzo
A. Trifiró
M. Trimarchi
H.X. Huang
O. Wieland
spellingShingle D. Santonocito
Y. Blumenfeld
C. Maiolino
C. Agodi
R. Alba
G. Bellia
R. Coniglione
A. Del Zoppo
F. Hongmei
E. Migneco
P. Piattelli
P. Sapienza
L. Auditore
G. Cardella
E. De Filippo
E. La Guidara
C. Monrozeau
M. Papa
S. Pirrone
F. Rizzo
A. Trifiró
M. Trimarchi
H.X. Huang
O. Wieland
Mapping the demise of collective motion in nuclei at high excitation energy
Physics Letters B
author_facet D. Santonocito
Y. Blumenfeld
C. Maiolino
C. Agodi
R. Alba
G. Bellia
R. Coniglione
A. Del Zoppo
F. Hongmei
E. Migneco
P. Piattelli
P. Sapienza
L. Auditore
G. Cardella
E. De Filippo
E. La Guidara
C. Monrozeau
M. Papa
S. Pirrone
F. Rizzo
A. Trifiró
M. Trimarchi
H.X. Huang
O. Wieland
author_sort D. Santonocito
title Mapping the demise of collective motion in nuclei at high excitation energy
title_short Mapping the demise of collective motion in nuclei at high excitation energy
title_full Mapping the demise of collective motion in nuclei at high excitation energy
title_fullStr Mapping the demise of collective motion in nuclei at high excitation energy
title_full_unstemmed Mapping the demise of collective motion in nuclei at high excitation energy
title_sort mapping the demise of collective motion in nuclei at high excitation energy
publisher Elsevier
series Physics Letters B
issn 0370-2693
publishDate 2018-07-01
description High energy gamma-rays from the 116Sn + 24Mg reaction at 23A MeV were measured using the MEDEA detector at LNS – INFN Catania. Combining this new data with previous measurements yields a detailed view of the quenching of the Giant Dipole Resonance as a function of excitation energy in nuclei of mass A in the range 120÷132. The transition towards the disappearance of the dipole strength, which occurs around 230 MeV excitation energy, appears to be remarkably sharp. Current phenomenological models give qualitative explanations for the quenching but cannot reproduce its detailed features. Keywords: Giant Dipole Resonance, Hot nuclei, Fusion reactions, Statistical Model
url http://www.sciencedirect.com/science/article/pii/S0370269318304167
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