( sup 16 O(0 sub 2 sup + )+. alpha. ) parentage of continuum levels in sup 20 Ne

Journal Article · Sat Feb 01 04:00:00 EST 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.45.576· OSTI ID:7205940

Laymon, C M; Brown, K D; Balamuth, D P ^[1]

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1. Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)

A search for continuum levels in {sup 20}Ne with a large ({sup 16}O(0{sub 2}{sup +})+{alpha}) parentage has been conducted using both resonant and direct production processes. The differential cross section for the {sup 16}O({alpha},{alpha}{sub 1}){sup 16}O{sup *}(0{sub 2}{sup +}) reaction has been measured at 13 to 26 angles for bombarding energies from {ital E}{sub {alpha}}=10.2 to 18 MeV, mostly in 25 keV steps. Events leading to the first excited state in {sup 16}O were identified by requiring the coincident observation of an {alpha} particle and an electron or positron from the internal pair decay of the {sup 16}O first excited state. Amplitudes of individual partial waves were extracted from the data by parametrizing the angular distributions in terms of the complex zeros of the scattering amplitudes. An {ital R}-matrix analysis of the data reveals a {ital J}{sup {pi}}=2{sup +} level at {ital E}{sub {ital x}}=13.1 MeV with a spectroscopic factor {Theta}{sub {alpha}1}{sup 2}{gt}63%.

• OSTI ID: 7205940
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 45:2; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
ALPHA REACTIONS
ALPHA SPECTRA
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DATA
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EXCITED STATES
EXPERIMENTAL DATA
INELASTIC SCATTERING
INFORMATION
ISOTOPES
LIGHT NUCLEI
MEV RANGE
MEV RANGE 10-100
NEON 20
NEON ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
OXYGEN 16
OXYGEN 16 TARGET
OXYGEN ISOTOPES
SCATTERING
SPECTRA
STABLE ISOTOPES
TARGETS