Alpha-Cluster States in {sup 18}O

Journal Article · Fri Jul 01 04:00:00 EDT 2005 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/1.1992561· OSTI ID:20692825

Goldberg, V Z ^[1]; Kaellman, K -M; Loennroth, T ^[2]; Manngaard, P ^[3]; Skorodumov, B B ^[4]

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1. Texas A and M University, College Station (United States)
2. Department of Physics, Aabo Akademi, Turku (Finland)
3. Swedish Polytechnic, Vasa (Finland)
4. Physics Department, University of Notre Dame, Notre Dame (United States)

The excitation function of elastic {alpha}-particle scattering on {sup 14}C has been measured in the laboratory energy range 16.3-19.2 MeV using a backscattering technique with a thick target. These data were analyzed together with the old low-energy data of G.L. Morgan et al. in the framework of the R-matrix formalism. Spin-parity assignments were made for 32 states in {sup 18}O in the excitation range 9-20 MeV. The estimates of the widths of the states are also presented. The 0{sup +} and 0{sup -} {alpha}-cluster bands appeared to be well separated by 5.6 MeV (as in {sup 16}O and {sup 20}Ne). We have not found a confirmation of existence of the negative-parity molecular states proposed by M. Gai et al. We observed an effect of a doubling of {alpha}-cluster levels in {sup 18}O similar to that found in {sup 22}Ne.

• OSTI ID: 20692825
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 7 Vol. 68; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
ALPHA REACTIONS
BACKSCATTERING
CARBON 14
CARBON 14 TARGET
CLUSTER MODEL
ELASTIC SCATTERING
EXCITATION
EXCITATION FUNCTIONS
LEVEL WIDTHS
MEV RANGE
NEON 20
NEON 22
NUCLEAR STRUCTURE
OXYGEN 16
OXYGEN 18
PARITY
R MATRIX
SPIN