Published 1965
| Version v1
Report
Open
Measurement of the fission cross-section of 235U and 239Pu for thermal neutrons
Creators
- 1. Commissariat a l'Energie Atomique, Saclay (France). Centre d'Etudes Nucleaires
Description
Improved techniques of fast detection have been applied for determining the fission cross-sections of 235U and 239Pu with reference to the absorption cross-section of Boron. Monochromatic neutron beams of 0.0322 eV, 0.0626 eV and 0.275 eV have been employed. Use has been made of a Xe-filled gaseous scintillator and of a low-geometry solid state ion chamber. Both measured alpha and fission rates. The results at the reference energy of 0.0253 eV are: (σF)0235U = 588 ± 10 barns (σF)0239Pu = 738 ± 7 barns. (authors)
Availability note (English)
Available from INIS in electronic formAbstract (French)
Des techniques avancees de comptage rapide ont ete mise en oeuvre pour determiner la section efficace de fission de 235U et de 239Pu par rapport a celle d'absorption du bore. Des faisceaux de neutrons monochromatiques de 0,0322 eV, 0,0626 eV et 0,275 eV ont ete employes. Les detecteurs utilises sont un scintillateur gazeux rempli de xenon et une chambre d'ionisation a etat solide a basse geometrie. Les deux ont mesure les taux des desintegrations alpha et des fissions. Les resultats a l'energie de reference de 0,0253 eV sont: (σF)0235U = 588 ± 10 barns (σF)0239Pu = 738 ± 7 barns. (auteurs)Files
37021778.pdf
Files
(3.0 MB)
| Name | Size | Download all |
|---|---|---|
|
md5:5af0d8da3fde5b7b10e370645cec1780
|
3.0 MB | Preview Download |
Additional details
Additional titles
- Original title (French)
- Mesures des sections de fission de
Publishing Information
- Imprint Pagination
- 92 p.
- Report number
- CEA-R--2775
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 37021778
- Subject category
- S73: NUCLEAR PHYSICS AND RADIATION PHYSICS;
- Descriptors DEI
- ABSORPTION; ALPHA SPECTRA; BORON COATED ION CHAMBERS; CROSS SECTIONS; EV RANGE; FISSION; FISSION FRAGMENT DETECTION; GAS SCINTILLATION DETECTORS; NEUTRON BEAMS; NEUTRON FLUX; NEUTRON REACTIONS; PLUTONIUM 239; THERMAL NEUTRONS; URANIUM 235
- Descriptors DEC
- ACTINIDE NUCLEI; ALPHA DECAY RADIOISOTOPES; BARYON REACTIONS; BARYONS; BEAMS; DETECTION; ELEMENTARY PARTICLES; ENERGY RANGE; EVEN-ODD NUCLEI; FERMIONS; HADRON REACTIONS; HADRONS; HEAVY NUCLEI; INTERNAL CONVERSION RADIOISOTOPES; IONIZATION CHAMBERS; ISOMERIC TRANSITION ISOTOPES; ISOTOPES; MEASURING INSTRUMENTS; MINUTES LIVING RADIOISOTOPES; NEUTRON DETECTORS; NEUTRONS; NUCLEAR REACTIONS; NUCLEI; NUCLEON BEAMS; NUCLEON REACTIONS; NUCLEONS; PARTICLE BEAMS; PLUTONIUM ISOTOPES; RADIATION DETECTION; RADIATION DETECTORS; RADIATION FLUX; RADIOISOTOPES; SCINTILLATION COUNTERS; SORPTION; SPECTRA; SPONTANEOUS FISSION RADIOISOTOPES; URANIUM ISOTOPES; YEARS LIVING RADIOISOTOPES
Optional Information
- Notes
- 49 refs.