MINIMIZING SELF-ABSORPTION IN 4$pi$ /cap beta/-COUNTING

Journal Article · Sun Dec 01 04:00:00 EST 1963 · Intern. J. Appl. Radiation Isotopes

DOI:https://doi.org/10.1016/0020-708X(63)90035-8· OSTI ID:4115389

Hallden, N A; Fisenne, I M

The incorporation of small Teflon particles into a solution of a weak BETA emitter, which is dried and 4 pi BETA -counted, was found to reduce self- absorption markedly. Sources of S/sup 35/, Pm/sup 147/, and Ni/sup 63/ were studied with and without the Teflon treatment. In the case of S/sup 35/, self- absorption can be reduced from 28 to 5.1 per cent if the mass of the source is about 0.5 mu g and 5 mu g of Teflon particles are added. Promethium-147 self- absorption can be reduced from 17 to 2.4 per cent for carrier masses of <1 mu g, and if as much as 10 mu g of carrier is present Pm/sup 147/ selfabsorption can be reduced from 54 to 4.3 per cent. Nickel63 self-absorption was reduced from 76 to 41.5 per cent but the original value of the Ni/sup 63/ standard source was not known accurately. (auth)

• Research Organization: New York Operations Office, New York
• NSA Number: NSA-18-012175
• OSTI ID: 4115389
• Journal Information: Intern. J. Appl. Radiation Isotopes, Journal Name: Intern. J. Appl. Radiation Isotopes Vol. Vol: 14
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
BETA DECAY
BETA DETECTION
BETA PARTICLES
CARRIERS
CHEMISTRY
COUNTERS
EFFICIENCY
EVAPORATION
FOUR-PI COUNTERS
GRAIN SIZE
HUMIDITY
MIXING
NICKEL 63
OPERATION
ORGANIC FLUORINE COMPOUNDS
PERFORMANCE
POLYMERS
POWDERS
PREPARATION
PROMETHIUM 147
QUANTITY RATIO
RADIATION SOURCES
RADIOCHEMISTRY
RADIOISOTOPES
SELF-ABSORPTION
STANDARDS
SULFUR 35
TABLES
TEFLON
TRACE AMOUNTS
USES
VARIATIONS
WATER