POSITRON ANNIHILATION IN AQUEOUS SOLUTIONS

Journal Article · Sun May 01 04:00:00 EDT 1960 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.118.668· OSTI ID:4154335

Trumpy, G

The angular correlation of 2-quantum emission from the annihilation of positrons in different materials was measured in an apparatus with 8 photon counters providing coincidences for 16 output channels. As positron targets were chosen indium, water, and aqueous solutions of 5 paramagnetic salts and 10 other substances. It was confirmed that the amount of singlet positronium formed is influenced by two processes: a reduction of positronium due to electron capture by oxidizing substances and an increase of the triplet -- singlet conversion due to the electron exchange with paramagnetic ions. The oxidation potential of positronium is found to be very nearly zero. The conversion rate seems to be proportional to the number of unpaired electrons on the dissolved ions. A discrepancy with the interpretation of Green and Rell for their lifetime experiments is discussed. (auth)

• Research Organization: Institutt for Atomenergi, Lillestrom, Norway
• NSA Number: NSA-14-016210
• OSTI ID: 4154335
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 118; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ANGULAR DISTRIBUTION
ANNIHILATION
ATOMS
CAPTURE
COINCIDENCE METHODS
ELECTRONS
EMISSION
INDIUM
IONS
LIFETIME
MEASURED VALUES
PHOTONS
PHYSICS
POSITRONIUM
POSITRONS
SALTS
SOLUTIONS
TARGETS
WATER