Molecular alpha-particle clustering in /sup 218/Ra; dipole collectivity in the vicinity of nuclear shell closures

Journal Article · Mon Aug 22 04:00:00 EDT 1983 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.51.646· OSTI ID:5539085

Gai, M; Ennls, J F; Ruscev, M; Schloemer, E C; Shivakuma, B; Sterbenz, S M; Tsoupas, N; Bromley, D A

Evidence for the presence of alpha-particle clustering in /sup 218/Ra comes from a number of observables: binding energy S/sub 2n/, Q/sub ..cap alpha../, E/sub x/(J/sup ..pi../), theta/sub ..cap alpha..//sup 2/ and, F/sub ..cap alpha../. That this clustering is a signature for the new dipole collectivity suggested by Iachello and Jackson follows from observation of simultaneous enhancement of selected E1, E2, and E3 deexcitation transition matrix elements; of these the E1 enhancement is most pronounced as would be expected for dipole collectivity.

• Research Organization: A. M. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511
• DOE Contract Number: AC02-76ER03074
• OSTI ID: 5539085
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 51:8; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ALPHA PARTICLES
BINDING ENERGY
BRANCHING RATIO
CARBON 13 REACTIONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CLUSTER MODEL
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
CROSS SECTIONS
DIPOLES
E1-TRANSITIONS
E2-TRANSITIONS
E3-TRANSITIONS
ELECTROMAGNETIC RADIATION
ENERGY
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXCITATION FUNCTIONS
FUNCTIONS
GAMMA RADIATION
HEAVY ION REACTIONS
HEAVY NUCLEI
IONIZING RADIATIONS
ISOTOPES
LEAD 208 TARGET
MATHEMATICAL MODELS
MATRIX ELEMENTS
MICROSEC LIVING RADIOISOTOPES
MOLECULAR MODELS
MULTIPOLE TRANSITIONS
MULTIPOLES
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
RADIATIONS
RADIOISOTOPES
RADIUM 218
RADIUM ISOTOPES
SHELL MODELS
TARGETS