The feasibility of using a Fourier RTOF spectrometer at a low-power research reactor
Creators
- 1. Nuclear Research Center, Atomic Energy Authority, Cairo (Egypt). Reactor and Neutron Physics Dept.
- 2. Kiel Univ. (Germany). Inst. fuer Reine und Angewandte Kernphysik
- 3. Academy of Sciences, Leningrad (USSR). Inst. of Nuclear Physics
Description
The present situation of Fourier time-of-flight (TOF) spectrometry is discussed using the FSS spectrometer as example. The use of the Fourier reverse TOF spectrometry, as an efficient tool for studying condensed matter, at a 2 MW (WWR-S type) reactor is also assessed. The arrangement of the RTOF spectrometer, which could be successfully used at such type of reactor, is introduced. The suggested arrangement applies a neutron guide tube of 24 m length and allows for effective luminosity 2.4.106 at a flight path distance of 3.6 m. The number of neutrons scattered from a sample (5 cm3 in volume) and incident on the detector system, as estimated for the suggested arrangement, is ∝1.6.103 n/sec. Such high counting rate allows to measure a diffraction spectrum within less than an hour. (orig.) With 12 figs
Availability note (English)
MF available from INIS under the Report Number.Abstract (German)
Der gegenwaertige Stand der Fourier Neutronen-Flugzeitspektrometrie wird am Beispiel des Spektrometers FSS diskutiert. Insbesondere wird die 'reverse time-of-flight' (RTOF)-Methode als effizientes Verfahren zur Untersuchung festkoerper-physikalischer Fragestellungen an Forschungsreaktoren niedriger Leistung (Beispiel: 2 MW Typ WWR-S Reaktor) untersucht. Das Konzept eines RTOF Spektrometers wird vorgestellt: Mit einem Neutronenleiter von 24 m Laenge und 3,6 m Flugweg kann eine effektive Luminositaet von 2,4.106 erreicht werden. Die Zahl der gestreuten Neutronen aus einem Volumen von 5 cm3 wird zu ca. 1,6.103 n/sec abgeschaetzt, so dass sich fuer die Aufnahme von Diffraktionsspektren mit dieser Anordnung Messzeiten in der Groessenordnung ∝1 h ergeben. (orig.) With 12 figs
Files
Restricted
The record is publicly accessible, but files are restricted to users with access.
Additional details
Publishing Information
- Imprint Pagination
- 25 p.
- Report number
- GKSS--91/E/65
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 23049388
- Subject category
- S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
- Descriptors DEI
- COUNTING RATES; LUMINOSITY; NEUTRON CHOPPERS; NEUTRON DIFFRACTOMETERS; NEUTRON FLUX; NEUTRON GUIDES; RESEARCH REACTORS; TIME DEPENDENCE; TIME-OF-FLIGHT SPECTROMETERS
- Descriptors DEC
- BEAM PULSERS; DIFFRACTOMETERS; MEASURING INSTRUMENTS; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RADIATION FLUX; REACTORS; RESEARCH AND TEST REACTORS; SPECTROMETERS