Breakup of {sup 12}C resonances into three alpha particles

Journal Article · Tue Jun 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.81.064313· OSTI ID:21388588

Kirsebom, O S; Fynbo, H O. U.; Hyldegaard, S; Riisager, K ^[1]; Alcorta, M; Borge, M J. G.; Cubero, M; Dominguez-Reyes, R; Madurga, M; Perea, A; Tengblad, O ^[2]; Diget, C A; Fulton, B R ^[3]; Fraile, L M ^[4]; Jonson, B; Nilsson, T; Nyman, G ^[5]; Munoz Martin, A ^[6]

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1. Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C (Denmark)
2. Instituto de Estructura de la Materia, CSIC, ES-28006 Madrid (Spain)
3. Department of Physics, University of York, York YO10 5DD (United Kingdom)
4. PH Department, CERN, CH-1211 Geneva 23 (Switzerland)
5. Fundamental Physics, Chalmers University of Technology, SE-41296 Goeteborg (Sweden)
6. CMAM, Universidad Autonoma de Madrid, Cantoblanco, ES-28049 Madrid (Spain)

The reaction {sup 3}He+{sup 11}B->d+{sup 12}C* has been used to populate resonances in {sup 12}C up to an excitation energy of 15 MeV. The subsequent breakup to three alpha particles has been measured in complete kinematics. Dalitz plots are used to visualize and analyze the data. The Dalitz plot intensity distribution exhibits zero points characteristic of the total spin and parity of the 3alpha system allowing us to determine the spin and parity of a state in {sup 12}C at 13.35 MeV whose quantum numbers were hitherto not well established. The Dalitz plot intensity distributions of the 2{sup -} state at 11.83 MeV and the 1{sup +} state at 12.71 MeV are compared with the predictions of a recent three-body calculation as well as with simpler models. All are able to reproduce the gross structures seen in the Dalitz plot, but none give an accurate description of the detailed profile of the distributions.

• OSTI ID: 21388588
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 81, Issue 6; Other Information: DOI: 10.1103/PhysRevC.81.064313; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
BORON 11
CARBON 12
DALITZ PLOT
DISTRIBUTION
EXCITATION
FORECASTING
HELIUM 3
MEV RANGE 10-100
NUCLEAR REACTIONS
PARITY
QUANTUM NUMBERS
RESONANCE
SPIN
THREE-BODY PROBLEM
ANGULAR MOMENTUM
BORON ISOTOPES
CARBON ISOTOPES
CHARGED PARTICLES
DIAGRAMS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
HELIUM ISOTOPES
INFORMATION
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
MANY-BODY PROBLEM
MEV RANGE
NUCLEI
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
RADIATIONS
SCATTERPLOTS
STABLE ISOTOPES