Level structure of /sup 220/Ra

Journal Article · Sun Dec 01 04:00:00 EST 1985 · Phys. Rev. C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.32.1888· OSTI ID:6334605

Shriner, Jr, J F; Cottle, P D; Ennis, J F; Gai, M; Bromley, D A; Olness, J W; Warburton, E K; Hildingsson, L; Quader, M A; Fossan, D B

A level scheme for /sup 220/Ra is presented, established using the /sup 208/Pb( /sup 14/C,2n) reaction studied near the Coulomb barrier (60< or =E< or =68 MeV). Measurements included ..gamma..-ray excitation functions, ..gamma..-..gamma.. coincidences, and ..gamma..-ray angular distributions. The dominant features in the spectrum are states of alternating parity connected by fast E1 transitions. Values of B(E1)/B(E2) are obtained for states with J = 6--17 h. Examination of the systematic behavior of even-even Ra isotopes reveals a sharp change in structure as one proceeds from /sup 214/Ra to /sup 226/Ra. Results are discussed in terms of alpha-particle clustering (in particular as described by the vibron model) and of a stable octupole deformation; calculations of the energy spectrum based on the vibron model are presented.

• Research Organization: A.W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06511
• OSTI ID: 6334605
• Journal Information: Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Journal Issue: 6 Vol. 32:6; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

651925* -- Nuclear Properties &amp; Reactions
A=190-219
Experimental-- Nuclear Reactions &amp; Scattering-- (-1987)
652023 -- Nuclear Properties &amp; Reactions
A=220 &amp; above
Experimental-- Energy Levels &amp; Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ALPHA DECAY RADIOISOTOPES
ALPHA PARTICLES
ANGULAR DISTRIBUTION
CARBON 14 REACTIONS
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
CLUSTER MODEL
COINCIDENCE SPECTROMETRY
COMPOUND-NUCLEUS REACTIONS
COULOMB FIELD
CROSS SECTIONS
DATA
DEFORMATION
DISTRIBUTION
E1-TRANSITIONS
ELECTRIC FIELDS
ELECTROMAGNETIC RADIATION
ENERGY LEVELS
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXCITATION FUNCTIONS
EXPERIMENTAL DATA
FUNCTIONS
GAMMA RADIATION
HEAVY ION REACTIONS
HEAVY NUCLEI
INFORMATION
IONIZING RADIATIONS
ISOTOPES
LEAD 208 TARGET
MATHEMATICAL MODELS
MULTIPOLE TRANSITIONS
NUCLEAR DEFORMATION
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
PARITY
PARTICLE PROPERTIES
RADIATIONS
RADIOISOTOPES
RADIUM 220
RADIUM ISOTOPES
SECONDS LIVING RADIOISOTOPES
SPECTRA
TARGETS