The enriched chromium neutrino source for GALLEX
The preparation and study of an intense source of neutrinos in the form of neutron irradiated materials which are enriched in Cr-50 for use in the GALLEX solar neutrino experiment are discussed. Chromyl fluoride gas is enriched in the Cr-50 isotope by gas centrifugation and subsequently converted to a very stable form of chromium oxide. The results of neutron activation analyses of such chromium samples indicate low levels of any long-lived activities, but show that short-lived activities, in particular Na-24, may be of concern. These results show that irradiating chromium oxide enriched in Cr-50 is preferable to irradiating either natural chromium or argon gas as a means of producing a neutrino source to calibrate the GALLEX detector. These results of the impurity level analysis of the enriched chromyl fluoride gas and its conversion to the oxide are also of interest to work in progress by other members of the Collaboration investigating an alternative conversion of the enriched gas to chromium metal. 35 refs., 12 figs., 5 tabs.
- Research Organization:
- Brookhaven National Lab., Upton, NY (USA)
- Sponsoring Organization:
- DOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 5870485
- Report Number(s):
- BNL-52281; ON: DE91010298
- Country of Publication:
- United States
- Language:
- English
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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
ACTIVATION ANALYSIS
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
CALIBRATION
CENTRIFUGATION
CHALCOGENIDES
CHEMICAL ANALYSIS
CHROMIUM 50
CHROMIUM 50 TARGET
CHROMIUM 51
CHROMIUM COMPOUNDS
CHROMIUM FLUORIDES
CHROMIUM ISOTOPES
CHROMIUM OXIDES
DETECTION
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
FERMIONS
FLUORIDES
FLUORINE COMPOUNDS
GAS CENTRIFUGATION
HADRON REACTIONS
HALIDES
HALOGEN COMPOUNDS
INTERMEDIATE MASS NUCLEI
ISOTOPE SEPARATION
ISOTOPES
LEPTONS
MASSLESS PARTICLES
MEASURING INSTRUMENTS
NEUTRINO DETECTION
NEUTRINOS
NEUTRON ACTIVATION ANALYSIS
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
OXIDES
OXYGEN COMPOUNDS
RADIATION DETECTION
RADIATION DETECTORS
RADIATIONS
RADIOISOTOPES
SEPARATION PROCESSES
SOLAR NEUTRINOS
SOLAR PARTICLES
SOLAR RADIATION
STABLE ISOTOPES
STELLAR RADIATION
TARGETS
TRANSITION ELEMENT COMPOUNDS