A study of ( sup 16 O(O sub 2 sup + )+. alpha. )parentage of sup 20 Ne continuum levels
Thesis/Dissertation
·
OSTI ID:5928616
A search for continuum levels in {sup 20}Ne with a large ({sup 16}O(O{sub 2}{sup +})+{alpha})parentage has been conducted using several reactions. Because of the predominantly 4 particle-4 hole (4p-4h) structure of the first excited state of {sup 16}O, such {sup 20}Ne levels are likely to have an 8p-4h structure. The differential cross section for the {sup 24}Mg({sup 24}Mg,{sup 20}Ne){sup 28}Si{sup *} (O{sub 2}{sup +}) reaction has been measured at 13 to 26 angles for bombarding energies from 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 pair decay of the {sup 16}O first excited state. Amplitudes of individual partial waves were extracted from the data by parameterizing the angular distributions in terms of their complex zeros. An R-matrix analysis of the data reveals a J{sup {pi}} = 2{sup +} level at E{sub x} = 13.1 MeV with {Theta}{sup 2}{sub {alpha}{sub 1}} > 70%.
- Research Organization:
- Pennsylvania Univ., Philadelphia, PA (USA)
- OSTI ID:
- 5928616
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
651420* -- Nuclear Properties & Reactions
A=20-38
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BRANCHING RATIO
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
HEAVY ION REACTIONS
INFORMATION
ISOTOPES
LIGHT NUCLEI
MAGNESIUM 24 TARGET
MEASURING METHODS
MEV RANGE
MEV RANGE 10-100
NEON 20
NEON ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
STABLE ISOTOPES
TARGETS
A=20-38
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BRANCHING RATIO
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DIFFERENTIAL CROSS SECTIONS
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
HEAVY ION REACTIONS
INFORMATION
ISOTOPES
LIGHT NUCLEI
MAGNESIUM 24 TARGET
MEASURING METHODS
MEV RANGE
MEV RANGE 10-100
NEON 20
NEON ISOTOPES
NUCLEAR REACTIONS
NUCLEI
NUMERICAL DATA
STABLE ISOTOPES
TARGETS