Targets for bulk hydrogen analysis using thermal neutrons

J. Csikai, B. Király, Cs M. Buczkó

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The reflection property of substances can be characterized by the reflection cross-section of thermal neutrons, σβ. A combination of the targets with thin polyethylene foils allowed an estimation of the flux depression of thermal neutrons caused by a bulk sample containing highly absorbing elements or compounds. Some new and more accurate σβ values were determined by using the combined target arrangement. For the ratio, R of the reflection and the elastic scattering cross-sections of thermal neutrons, R = σβEL a value of 0.60±0.02 was found on the basis of the data obtained for a number of elements from H to Pb. Using this correlation factor, and the σEL values, the unknown σβ data can be deduced. The equivalent thicknesses, to polyethylene or hydrogen, of the different target materials were determined from the σβ values.

Original languageEnglish
Pages (from-to)166-170
Number of pages5
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume480
Issue number1
DOIs
Publication statusPublished - Mar 11 2002

Fingerprint

thermal neutrons
Thermoanalysis
Neutrons
Hydrogen
Polyethylenes
polyethylenes
hydrogen
Elastic scattering
scattering cross sections
Metal foil
foils
elastic scattering
Fluxes
cross sections
Hot Temperature

Keywords

  • Neutron elastic scattering
  • Neutron moderation
  • Neutron reflectometry
  • Nuclear data analysis

ASJC Scopus subject areas

  • Instrumentation
  • Nuclear and High Energy Physics

Cite this

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T1 - Targets for bulk hydrogen analysis using thermal neutrons

AU - Csikai, J.

AU - Király, B.

AU - Buczkó, Cs M.

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N2 - The reflection property of substances can be characterized by the reflection cross-section of thermal neutrons, σβ. A combination of the targets with thin polyethylene foils allowed an estimation of the flux depression of thermal neutrons caused by a bulk sample containing highly absorbing elements or compounds. Some new and more accurate σβ values were determined by using the combined target arrangement. For the ratio, R of the reflection and the elastic scattering cross-sections of thermal neutrons, R = σβ/σEL a value of 0.60±0.02 was found on the basis of the data obtained for a number of elements from H to Pb. Using this correlation factor, and the σEL values, the unknown σβ data can be deduced. The equivalent thicknesses, to polyethylene or hydrogen, of the different target materials were determined from the σβ values.

AB - The reflection property of substances can be characterized by the reflection cross-section of thermal neutrons, σβ. A combination of the targets with thin polyethylene foils allowed an estimation of the flux depression of thermal neutrons caused by a bulk sample containing highly absorbing elements or compounds. Some new and more accurate σβ values were determined by using the combined target arrangement. For the ratio, R of the reflection and the elastic scattering cross-sections of thermal neutrons, R = σβ/σEL a value of 0.60±0.02 was found on the basis of the data obtained for a number of elements from H to Pb. Using this correlation factor, and the σEL values, the unknown σβ data can be deduced. The equivalent thicknesses, to polyethylene or hydrogen, of the different target materials were determined from the σβ values.

KW - Neutron elastic scattering

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KW - Neutron reflectometry

KW - Nuclear data analysis

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