Observation of abnormally large radii of nuclei in excited states in the vicinity of neutron thresholds

Journal Article · Tue Nov 15 04:00:00 EST 2011 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778811110147· OSTI ID:22043827

Danilov, A N ^[1]; Belyaeva, T L ^[2]; Demyanova, A S ^[1]; Goncharov, S A ^[3]; Trzaska, W ^[4]

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1. Russian Research Centre Kurchatov Institute (Russian Federation)
2. Universidad Nacional Autonoma de Mexico (UNAM) (Mexico)
3. Moscow State University, Skobeltsyn Institute of Nuclear Physics (Russian Federation)
4. University of Jyvaeskylae (Finland)

Differential cross sections for inelastic scattering leading to the excitation of some nuclear states situated near neutron-emission thresholds were analyzed. With the aid of a modified diffraction model, abnormally large radii were found for the 1/2{sub 1}{sup +} state of the {sup 13}C nucleus at 3.09 MeV, for the first levels of positive-parity rotational bands in the {sup 9}Be (1/2{sup +} level at 1.68 MeV and 5/2{sup +} level at 3.05 MeV) and {sup 11}Be (5/2{sup +} level at 1.78 MeV and 3/2{sup +} level at 3.41 MeV) nuclei, and for the 2{sub 1}{sup +} state of the {sup 14}Be nucleus at 1.54 MeV and 1{sub 1}{sup -} state of the {sup 12}Be nucleus at 2.7 MeV. All of these states possess signatures typical of neutron halos.

• OSTI ID: 22043827
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 11 Vol. 74; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BERYLLIUM 11
BERYLLIUM 12
BERYLLIUM 14
BERYLLIUM 9
CARBON 13
DIFFERENTIAL CROSS SECTIONS
DIFFRACTION MODELS
EXCITATION
INELASTIC SCATTERING
MEV RANGE
NEUTRON EMISSION
NEUTRONS
NUCLEAR HALOS
NUCLEAR STRUCTURE
PARITY
ROTATIONAL STATES