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DIAGRAMME NEUTRONS-NEUTRONS EPITHERMIQUES [1 record]
Record 1 - internal organization data 1989-09-29
Record 1, English
Record 1, Subject field(s)
- Geophysics
- Geological Prospecting
Record 1, Main entry term, English
- epithermal-neutron log
1, record 1, English, epithermal%2Dneutron%20log
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- n-en log 2, record 1, English, n%2Den%20log
correct
- neutron-epithermal-neutron log 3, record 1, English, neutron%2Depithermal%2Dneutron%20log
correct
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
A well log of the wall-contact log type that measures radioactivity induced by neutron-neutron reactions. Fast neutrons of several MeV energy, emitted by a source in the sonde, may be slowed and backscattered as epithermal neutrons (0.4 to 100 ev) by collisions with hydrogen nuclei. Epithermal-neutron abundance is interpreted by assuming a constant lithology, usually limestone, that produces a continuous curve in porosity units. The epithermal-neutron log is largely insensitive to the differences in chlorinity of formation water that may hamper the interpretation of the thermal-neutron log and neutron-gamma log. 2, record 1, English, - epithermal%2Dneutron%20log
Record 1, French
Record 1, Domaine(s)
- Géophysique
- Prospection géologique
Record 1, Main entry term, French
- diagraphie de neutrons épithermiques
1, record 1, French, diagraphie%20de%20neutrons%20%C3%A9pithermiques
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
- diagramme Neutrons-Neutrons épithermiques 2, record 1, French, diagramme%20Neutrons%2DNeutrons%20%C3%A9pithermiques
correct, masculine noun
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
On peut, soit mesurer les rayons gamma de capture et on obtient un diagramme "Neutron-Gamma", soit mesurer les neutrons thermiques, on obtient un diagramme "Neutrons-Neutrons thermiques" ou bien encore les neutrons épithermiques (non encore complètement ralentis) qui donnent un diagramme "Neutrons-Neutrons épithermiques". 2, record 1, French, - diagraphie%20de%20neutrons%20%C3%A9pithermiques
Record 1, Spanish
Record 1, Textual support, Spanish
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