Systematics of alpha-cluster states above double shell closures

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.51.559· OSTI ID:6643299

Buck, B ^[1]; Merchant, A C; Perez, S M ^[2]

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1. Department of Physics, University of Oxford, Theoretical Physics, 1 Keble Road, Oxford OX1 3NP (United Kingdom)
2. Department of Physics, University of Oxford, Nuclear Physics Laboratory, Keble Road, Oxford OX1 3RH (United Kingdom)

Alpha particle cluster models have been very successful in reproducing energy spectra, static and dynamic electromagnetic properties, [alpha]-emission widths and [alpha]-nucleus elastic scattering data in light nuclei around the double shell closures at [sup 16]O and [sup 40]Ca. We extend the application of one such model to the heavier mass regions above [sup 90]Zr and [sup 208]Pb. In all cases we employ a potential of given geometric form with all parameters fixed except for the radius that is tailored to each nucleus in turn. We find that the potentials needed for [sup 20]Ne and [sup 44]Ti are very similar to the real parts of the optical potentials used in an accurate description of [alpha]-[sup 16]O and [alpha]-[sup 40]Ca elastic scattering up to high energies. By suitable choice of the quantum numbers that describe the relative motion of the [alpha] particle and the core nucleus we are able to give a good account of the spectra, the reduced [ital E]2 transition strengths, and the [alpha]-particle emission widths (or lifetimes) of the members of the ground state bands in the four nuclei [sup 20]Ne, [sup 44]Ti, [sup 94]Mo, and [sup 212]Po. The potential chosen also allows a consistent description of the half-lives for favored [alpha] decay throughout the Periodic Table.

• OSTI ID: 6643299
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 51:2; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA DECAY RADIOISOTOPES
ALPHA PARTICLES
BETA DECAY RADIOISOTOPES
CALCIUM 40 TARGET
CHARGED PARTICLES
CLUSTER MODEL
DIMENSIONS
E2-TRANSITIONS
ELASTIC SCATTERING
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY SPECTRA
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
GROUND STATES
HEAVY NUCLEI
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEAD 208
LEAD ISOTOPES
LIFETIME
LIGHT NUCLEI
MATHEMATICAL MODELS
MILLISEC LIVING RADIOISOTOPES
MOLYBDENUM 94
MOLYBDENUM ISOTOPES
MULTIPOLE TRANSITIONS
NANOSEC LIVING RADIOISOTOPES
NEON 20
NEON ISOTOPES
NUCLEAR MODELS
NUCLEI
OXYGEN 16 TARGET
POLONIUM 212
POLONIUM ISOTOPES
POTENTIALS
QUANTUM NUMBERS
RADIOISOTOPES
SCATTERING
SECONDS LIVING RADIOISOTOPES
SPECTRA
STABLE ISOTOPES
TARGETS
TITANIUM 44
TITANIUM ISOTOPES
WIDTH
YEARS LIVING RADIOISOTOPES
ZIRCONIUM 90
ZIRCONIUM ISOTOPES