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Journal articles
Role of the Δ Resonance in the Population of a Four-Nucleon State in the $^{56}$Fe → $^{54} $Fe Reaction at Relativistic Energies
Zs. Podolyák
M. Shand
N. Lalović
J. Gerl
D. Rudolph
T. Alexander
P. Boutachkov
M. Cortés
M. Górska
I. Kojouharov
N. Kurz
C. Louchart
E. Merchán
C. Michelagnoli
1
M. Pérez-Vidal
S. Pietri
D. Ralet
M. Reese
H. Schaffner
Ch. Stahl
H. Weick
F. Ameil
G. de Angelis
T. Arici
R. Carroll
Zs. Dombrádi
A. Gadea
P. Golubev
M. Lettmann
C. Lizarazo
D. Mahboub
H. Pai
Z. Patel
N. Pietralla
P. Regan
G. Sarmiento
O. Wieland
E. Wilson
B. Birkenbach
B. Bruyneel
2
I. Burrows
L. Charles
3
E. Clément
1
L. Crespi
D. Cullen
P. Désesquelles
4
J. Eberth
V. González
T. Habermann
L. Harkness-Brennan
H. Hess
D. Judson
A. Jungclaus
W. Korten
2
M. Labiche
A. Maj
D. Mengoni
D.R. Napoli
A. Pullia
B. Quintana
G. Rainovski
P. Reiter
M.D. Salsac
2
E. Sanchis
J. j. Valiente Dóbon
J. j. Valiente Dóbon
Author
1
GANIL - Grand Accélérateur National d'Ions Lourds (Bvd Henri Becquerel - BP 55027 - 14076 CAEN CEDEX 5 - France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : DRF/GANIL (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UPR3266 (France)
2
IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers (CEA Saclay
F-91191 Gif sur Yvette cedex - France)
- CEA - Commissariat à l'énergie atomique et aux énergies alternatives : DRF/IRFU (Centre de Saclay Centre de Grenoble Centre de Cadarache etc - France)
- Université Paris-Saclay (Espace Technologique, Bat. Discovery - RD 128 - 2e ét., 91190 Saint-Aubin - France)
3
IPHC - Institut Pluridisciplinaire Hubert Curien (23 rue Loess - BP 28 67037 Strasbourg Cedex - France)
- CNRS - Centre National de la Recherche Scientifique : UMR7178 (France)
- UNISTRA - Université de Strasbourg (4 rue Blaise Pascal - CS 90032 - 67081 Strasbourg cedex - France)
4
CSNSM - Centre de Sciences Nucléaires et de Sciences de la Matière (Bâtiments 104 et 108 91405 Orsay Campus - France)
- UP11 - Université Paris-Sud - Paris 11 (Bâtiment 300 - 91405 Orsay cedex - France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- CNRS - Centre National de la Recherche Scientifique : UMR8609 (France)
Abstract : The 54Fe nucleus was populated from a 56Fe beam impinging on a Be target with an energy of
E=A ¼ 500 MeV. The internal decay via γ-ray emission of the 10þ metastable state was observed. As the
structure of this isomeric state has to involve at least four unpaired nucleons, it cannot be populated in a
simple two-neutron removal reaction from the 56Fe ground state. The isomeric state was produced in the
low-momentum (-energy) tail of the parallel momentum (energy) distribution of 54Fe, suggesting that it was
populated via the decay of the Δ0 resonance into a proton. This process allows the population of fournucleon
states, such as the observed isomer. Therefore, it is concluded that the observation of this 10þ
metastable state in 54Fe is a consequence of the quark structure of the nucleons.
Domain :
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http://hal.in2p3.fr/in2p3-01401953
Contributor : Michel Lion <>
Submitted on : Thursday, November 24, 2016 - 9:00:18 AM
Last modification on : Monday, February 10, 2020 - 6:13:21 PM
Contributor : Michel Lion <>
Submitted on : Thursday, November 24, 2016 - 9:00:18 AM
Last modification on : Monday, February 10, 2020 - 6:13:21 PM
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- HAL Id : in2p3-01401953, version 1
- DOI : 10.1103/PhysRevLett.117.222302
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Citation
Zs. Podolyák, M. Shand, N. Lalović, J. Gerl, D. Rudolph, et al.. Role of the Δ Resonance in the Population of a Four-Nucleon State in the $^{56}$Fe → $^{54} $Fe Reaction at Relativistic Energies. Physical Review Letters, American Physical Society, 2016, 117 (22), ⟨10.1103/PhysRevLett.117.222302⟩. ⟨in2p3-01401953⟩
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