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Journal articles
Decay Pattern of Pygmy States Observed in Neutron-Rich 26Ne
J. Gibelin
1
D. Beaumel
1
T. Motobayashi
Y. Blumenfeld
1
N. Aoi
H. Baba
Z. Elekes
S. Fortier
1
N. Frascaria
1
N. Fukuda
T. Gomi
K. Ishikawa
Y. Kondo
T. Kubo
V. Lima
1
T. Nakamura
A. Saito
Y. Satou
J. A. Scarpaci
1
E. Takeshita
S. Takeuchi
T. Teranishi
Y. Togano
A. M. Vinodkumar
Y. Yanagisawa
K. Yoshida
J. Gibelin 1
Author Employer institution : Université de Caen Normandie IdHAL : julien-gibelin ORCID : https://orcid.org/0000-0001-6751-3714
D. Beaumel 1
Author
T. Motobayashi
Author
Y. Blumenfeld 1
Author
Y. Yanagisawa
Author
K. Yoshida
Author
1
IPNO - Institut de Physique Nucléaire d'Orsay (IPN - 15, rue Georges Clemenceau - 91406 ORSAY CEDEX - France)
- CNRS - Centre National de la Recherche Scientifique : UMR8608 (France)
- IN2P3 - Institut National de Physique Nucléaire et de Physique des Particules du CNRS (France)
- UP11 - Université Paris-Sud - Paris 11 (Bâtiment 300 - 91405 Orsay cedex - France)
Abstract : Coulomb excitation of the exotic neutron-rich nucleus 26Ne on a 208Pb target was measured at 58 MeV/u in order to search for low-lying E1 strength above the neutron emission threshold. This radioactive beam experiment was carried out at the RIKEN Accelerator Research Facility. Using the invariant mass method in the 25Ne+n channel, we observe a sizable amount of E1 strength between 6 and 10 MeV excitation energy. By performing a multipole decomposition of the differential cross section, a reduced dipole transition probability of B(E1)=0.49±0.16e2 fm2 is deduced, corresponding to 4.9±1.6% of the Thomas-Reiche-Kuhn sum rule. For the first time, the decay pattern of low-lying strength in a neutron-rich nucleus is measured. The extracted decay pattern is not consistent with several mean-field theory descriptions of the pygmy states.
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Journal articles
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Complete list of metadatas
http://hal.in2p3.fr/in2p3-00577154
Contributor : Sophie Heurteau <>
Submitted on : Wednesday, March 16, 2011 - 3:26:04 PM
Last modification on : Wednesday, September 16, 2020 - 4:08:31 PM
Contributor : Sophie Heurteau <>
Submitted on : Wednesday, March 16, 2011 - 3:26:04 PM
Last modification on : Wednesday, September 16, 2020 - 4:08:31 PM
Identifiers
- HAL Id : in2p3-00577154, version 1
- DOI : 10.1103/PhysRevLett.101.212503
Citation
J. Gibelin, D. Beaumel, T. Motobayashi, Y. Blumenfeld, N. Aoi, et al.. Decay Pattern of Pygmy States Observed in Neutron-Rich 26Ne. Physical Review Letters, American Physical Society, 2008, 101, pp.212503. ⟨10.1103/PhysRevLett.101.212503⟩. ⟨in2p3-00577154⟩
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