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RESONANCE REACTIONS

Journal Article · · Nuclear Instr. & Methods

The experimental conditions are discussed for the observation of reactions proceeding through narrow isolated resonances. This includes a survey of gamma -ray resonant scattering or absorption techniques, making use of accelerator-produced radiation. This general intrcduction is followed by some examples of recent Utrecht work on resonance reactions. The Na/sup 23/(p, gamma )Mg/sup 24/ reaction was investigated at sik resonance levels in the E/sub p/ =300 -- 800 kev region. The gamma -ray branching was determined of these levels and of twelve lower levels in Mg/sup 24/. Gamma-ray angular distributions were measured at nine resonances in the Mg/sup 24/ ( alpha , gamma )Si/sup 28/ reaction, from which resonance spins and parities can be determined in a unique way. Isotopic spin selection rules explain the relative weakness of observed E1 and M1 transitions compared to E2 transitions. From yield measurements in the Al/ sup 27/(p, gamma Si/sup 28/, Al/sup 27/(p, alpha )Mg/sup 24/, and Mg/sup 24/( alpha , gamma )Si/sup 28/ reactions the partial widths were obtained for the decay of the relevant Si/sup 28/ resonance levels. (auth)

Research Organization:
Rijksuniversiteit, Utrecht
Sponsoring Organization:
USDOE
NSA Number:
NSA-15-012137
OSTI ID:
4070170
Journal Information:
Nuclear Instr. & Methods, Journal Name: Nuclear Instr. & Methods Vol. Vol: 11
Country of Publication:
Country unknown/Code not available
Language:
English

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Related Subjects

ABSORPTION
ACCELERATORS
ALPHA BEAMS
ALPHA PARTICLES
ALUMINUM 27
ANGULAR DISTRIBUTION
ATOMIC MODELS
BRANCHING RATIO
CAPTURE
CROSS SECTIONS
DECAY
DIPOLES
EFFICIENCY
ELECTRIC FIELDS
ELECTRIC MOMENTS
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXCITATION
GAMMA RADIATION
GAMMA SOURCES
ION BEAMS
ISOSPIN
MAGNESIUM 24
MAGNETIC FIELDS
MAGNETIC MOMENTS
MEASURED VALUES
MOLECULES
NUCLEAR MODELS
NUCLEAR REACTIONS
PARITY
PARTICLE MODELS
PHYSICS
PROTON BEAMS
PROTONS
QUADRUPOLES
RESONANCE
SCATTERING
SILICON 28
SODIUM 23
SPECTRA
SPIN
TARGETS
TRANSIENTS