Electric quadrupole strength in /sup 16/O from the /sup 15/N(p-arrow-right,. gamma. /sub 0/) /sup 16/O reaction reaction
Journal Article
·
· Phys. Rev. C; (United States)
Angular distributions of the relative cross sections and analyzing powers have been measured for the /sup 15/N(p-arrow-right,..gamma../sub 0/)/sup 16/O reaction in approx. =500 keV steps for excitation energies in /sup 16/O between 17.8 and 24.9 MeV. All E1 and E2 transition matrix elements were determined using a partial-wave analysis. Below 22 MeV, little quadrupole strength was found in excess of that predicted in direct capture calculations. A clear enhancement of the E2 cross section was observed at energies above 22 MeV. Our data indicate that about 10% of the isoscalar E2 sum rule for /sup 16/O is exhausted in the p/sub 0/ decay channel between 18 and 25 MeV, with approximately (34 of this integrated strength concentrated between 22 and 25 MeV. The E2 strength seen in (..gamma..,p/sub 0/) is strikingly different from that observed in (..cap alpha..,..cap alpha..') or (..cap alpha..,..cap alpha..'p). The effect of the M1 state at E/sub x/ = 18.8 MeV previously found in (p,..gamma..) studies is clearly observed.
- Research Organization:
- Department of Physics, Stanford University, Stanford, California 94305
- OSTI ID:
- 5186103
- Journal Information:
- Phys. Rev. C; (United States), Journal Name: Phys. Rev. C; (United States) Vol. 37:6; ISSN PRVCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
651320* -- Nuclear Properties & Reactions
A=6-19
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANALYZING POWER
ANGULAR DISTRIBUTION
BARYON REACTIONS
BEAMS
CAPTURE
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DISTRIBUTION
E1-TRANSITIONS
E2-TRANSITIONS
ELECTROMAGNETIC RADIATION
ELECTROSTATIC ACCELERATORS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EQUATIONS
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
GAMMA RADIATION
HADRON REACTIONS
INFORMATION
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
MATRIX ELEMENTS
MEV RANGE
MEV RANGE 01-10
MEV RANGE 10-100
MULTIPOLE TRANSITIONS
NITROGEN 15 TARGET
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
OXYGEN 16
OXYGEN ISOTOPES
POLARIZED BEAMS
PROTON REACTIONS
RADIATIONS
STABLE ISOTOPES
SUM RULES
TARGETS
VAN DE GRAAFF ACCELERATORS
A=6-19
Experimental
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ANALYZING POWER
ANGULAR DISTRIBUTION
BARYON REACTIONS
BEAMS
CAPTURE
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DISTRIBUTION
E1-TRANSITIONS
E2-TRANSITIONS
ELECTROMAGNETIC RADIATION
ELECTROSTATIC ACCELERATORS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EQUATIONS
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
GAMMA RADIATION
HADRON REACTIONS
INFORMATION
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
MATRIX ELEMENTS
MEV RANGE
MEV RANGE 01-10
MEV RANGE 10-100
MULTIPOLE TRANSITIONS
NITROGEN 15 TARGET
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUMERICAL DATA
OXYGEN 16
OXYGEN ISOTOPES
POLARIZED BEAMS
PROTON REACTIONS
RADIATIONS
STABLE ISOTOPES
SUM RULES
TARGETS
VAN DE GRAAFF ACCELERATORS