Concerning Amidol Development of Nuclear Emulsions

Journal Article · Thu Jan 01 04:00:00 EST 1959 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1716349· OSTI ID:4275511

Fatzer, G. D.

A lowering of the development temperature introduces development defects which are characterized by the partial or total destruction of the developed image and by a deep coloration of the emulsion. These defects are eliminated by increasing the sodium sulfite concentration of the developer. Up to now contrast in nuclear emulsions has been evaluated subjectively by the experimenter; this forbids any comparison of the results obtained in different laboratories. It is shown that reliable low-temperature development with the usual developers requires an increase in the ratio (Na/sub 2/SO/sub 3/)/ (Amidol). For development temperatures of 10 to 15 deg C the concentration ratio needs to be 70% greater than the ones commonly used. A study of track and fog grain properties is carried out. It is shown that at a given temperature the mean gap length is practically independent of the development parameters. The optimum conditions at 14 deg C are determined with the help of a new quantity termed "track visibility" (K), a track to fog signal, and defined by K = blob length x track grain diameter/fog x (fog grain diameter)./sup 2/

• Research Organization: Laboratoire de Recherches nucleaires, Lausanne, Switzerland
• Sponsoring Organization: USDOE
• NSA Number: NSA-13-007716
• OSTI ID: 4275511
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 30; ISSN 0034-6748
• Publisher: American Institute of Physics (AIP)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AEROSOLS
AMIDOL
BACKGROUND
CHEMICALS
COLOR
CONFIGURATION
DEFECTS
DEVELOPMENT
DISTANCE
EFFICIENCY
ERRORS
FOG
GRAIN SIZE
IMAGES
INSTRUMENTS
LOW TEMPERATURE
NUCLEAR EMULSIONS
OPERATION
ORGANIC NITROGEN COMPOUNDS
PARTICLE TRACKS
PHENOLS
QUANTITATIVE ANALYSIS
QUANTITY RATIO
SIGNALS
SODIUM COMPOUNDS
SULFITES
TEMPERATURE
VARIATIONS