Comment on a search for a 0/sup -/. -->. 0/sup +/ pair transition in /sup 16/O

Journal Article · Sat Jul 01 04:00:00 EDT 1978 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.18.576· OSTI ID:6735546

Alburger, D E

The possible 0/sup -/ ..-->.. 0/sup +/ ground-state pair decay of the /sup 16/O 10.95- MeV 0/sup -/ state was reinvestigated using the /sup 19/F (p,..cap alpha..)/sup 16/O reaction at E/sub p/ = 5.4--5.7 MeV and a magnetic pair spectrometer. A previously reported pair peak of 3.84 MeV due to the 10.952 ..-->.. 7.117-MeV transition was not observed. The data indicate a much smaller relative population of the 10.95-MeV state in this reaction than reported previously and this places doubt on the upper limit derived earlier for the 0/sup -/ ..-->.. 0/sup +/ ground-state pair decay. In a test of the /sup 14/N(/sup 3/He,p)/sup 16/O reaction at E/sub 3He/ = 4 MeV the yield was too low to study the 10.95-MeV state. Using the /sup 13/C(d,p)/sup 14/C reaction at E/sub d/ = 4.5 MeV the 0/sup -/ ..-->.. 0/sup +/ ground-state branch from the 6.90-MeV 0/sup -/ state of /sup 14/C was found to be <1.1 x 10/sup -4/ via pair decay. The corresponding lifetime limit, tau (0/sup -/ ..-->.. 0/sup +/)/sub e/+e-> 3 x 10/sup -10/ sec, is not considered significant. It is concluded that a sensitive search for M0 pair transitions remains to be made.

• Research Organization: Brookhaven National Laboratory, Upton, New York 11973
• OSTI ID: 6735546
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 18:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA PARTICLES
BARYON REACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BRANCHING RATIO
CARBON 13 TARGET
CARBON 14
CARBON ISOTOPES
CHARGED PARTICLES
CHARGED-PARTICLE REACTIONS
DEUTERON REACTIONS
DIRECT REACTIONS
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
FERMIONS
FLUORINE 19 TARGET
GROUND STATES
HADRON REACTIONS
HADRONS
ISOTOPES
LIGHT NUCLEI
MEV RANGE
MEV RANGE 01-10
MULTI-NUCLEON TRANSFER REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
ONE-NUCLEON TRANSFER REACTIONS
OXYGEN 16
OXYGEN ISOTOPES
PROTON REACTIONS
PROTONS
RADIOISOTOPES
STABLE ISOTOPES
TARGETS
THREE-NUCLEON TRANSFER REACTIONS
TRANSFER REACTIONS
YEARS LIVING RADIOISOTOPES