Observation of a Large Reaction Cross Section in the Drip-Line Nucleus {sup 22}C

Journal Article · Fri Feb 12 04:00:00 EST 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.104.062701· OSTI ID:21386789

Tanaka, K; Aoi, N; Baba, H; Kubo, T; Kurokawa, M; Michimasa, S; Motobayashi, T; Sakurai, H; Takeshita, E; Takeuchi, S; Yamada, K ^[1]; Yamaguchi, T; Suzuki, T; Kobayashi, K; Komuro, M; Nakajima, S; Shinoda, R; Yoshitake, M ^[2]; Ohtsubo, T; Aiba, T ^[3]

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1. RIKEN Nishina Center, Saitama 351-0198 (Japan)
2. Department of Physics, Saitama University, Saitama 338-8570 (Japan)
3. Department of Physics, Niigata University, Niigata 950-2181 (Japan)

Reaction cross sections ({sigma}{sub R}) for {sup 19}C, {sup 20}C and the drip-line nucleus {sup 22}C on a liquid hydrogen target have been measured at around 40A MeV by a transmission method. A large enhancement of {sigma}{sub R} for {sup 22}C compared to those for neighboring C isotopes was observed. Using a finite-range Glauber calculation under an optical-limit approximation the rms matter radius of {sup 22}C was deduced to be 5.4+-0.9 fm. It does not follow the systematic behavior of radii in carbon isotopes with N<=14, suggesting a neutron halo. It was found by an analysis based on a few-body Glauber calculation that the two-valence neutrons in {sup 22}C preferentially occupy the 1s{sub 1/2} orbital.

• OSTI ID: 21386789
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 6 Vol. 104; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
APPROXIMATIONS
BARYONS
CALCULATION METHODS
CARBON 19
CARBON 20
CARBON 22
CARBON ISOTOPES
CROSS SECTIONS
ELEMENTARY PARTICLES
ELEMENTS
ENERGY RANGE
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
GLAUBER THEORY
HADRONS
HYDROGEN
ISOTOPES
LIGHT NUCLEI
MANY-BODY PROBLEM
MEV RANGE
NEUTRONS
NONMETALS
NUCLEAR HALOS
NUCLEI
NUCLEONS
TRANSMISSION
VALENCE