Matches in SemOpenAlex for { <https://semopenalex.org/work/W60391909> ?p ?o ?g. }
Showing items 1 to 66 of
66
with 100 items per page.
- W60391909 abstract "The author have previously reported the focusing of a neutron beam by a lens composed of a bundle of glass capillary fibers using multiple grazing-angle reflection. The lens collects neutrons from a 45- x 50-mm beam from a {sup 58}Ni guide viewing a cold source and focuses them to a spot 0.53 mm full-width at half-maximum (FWHM) with a gain in flux of a factor of 80. Spatially resolved prompt-gamma activation analyses of boron, cadmium, and gadolinium have been demonstrated with submillimetre spatial resolution. The lens brings only a few percent of the incident neutrons to the focus. Because this lens is symmetrical, the high-intensity focal spot is in the shadow of the incident beam, which gives a high background. An object diaphragm of {sup 6}LiF (tapering to 1-mm aperture) is used just upstream from the sample to improve the contrast, but because this diaphragm and its support are necessarily located in the direct view of the gamma-ray detector, the gamma background is increased. Substantial background also comes from neutron scattering and capture in the lens itself, its mounting and positioning structure, and the surrounding shielding. Based on these measurements, a new neutron lens has been designed and constructed. Itsmore » installation was coordinated with a complete reconstruction of the prompt-gamma spectrometer in conjunction with the recent installation of a new liquid-H{sub 2} cold source at the NIST research reactor. To improve the signal-to-background ratio at the focal spot, a bent bundle of 3997 lead-glass fibers directs the neutrons to a focal spot 20 mm below the bottom edge of the incident beam. A motorized translation stage allows the lens to be remotely inserted into the neutron beam and removed when not needed.« less" @default.
- W60391909 created "2016-06-24" @default.
- W60391909 creator A5033270620 @default.
- W60391909 creator A5040842073 @default.
- W60391909 creator A5061029233 @default.
- W60391909 creator A5068242020 @default.
- W60391909 creator A5084219314 @default.
- W60391909 creator A5084701144 @default.
- W60391909 date "1996-12-01" @default.
- W60391909 modified "2023-09-27" @default.
- W60391909 title "Installation of a Neutron Bender-Lens for Spatially Resolved Prompt-Gamma Activation Analysis | NIST" @default.
- W60391909 hasPublicationYear "1996" @default.
- W60391909 type Work @default.
- W60391909 sameAs 60391909 @default.
- W60391909 citedByCount "0" @default.
- W60391909 crossrefType "journal-article" @default.
- W60391909 hasAuthorship W60391909A5033270620 @default.
- W60391909 hasAuthorship W60391909A5040842073 @default.
- W60391909 hasAuthorship W60391909A5061029233 @default.
- W60391909 hasAuthorship W60391909A5068242020 @default.
- W60391909 hasAuthorship W60391909A5084219314 @default.
- W60391909 hasAuthorship W60391909A5084701144 @default.
- W60391909 hasConcept C120665830 @default.
- W60391909 hasConcept C121332964 @default.
- W60391909 hasConcept C152568617 @default.
- W60391909 hasConcept C15336307 @default.
- W60391909 hasConcept C181833780 @default.
- W60391909 hasConcept C185544564 @default.
- W60391909 hasConcept C192562407 @default.
- W60391909 hasConcept C7910260 @default.
- W60391909 hasConceptScore W60391909C120665830 @default.
- W60391909 hasConceptScore W60391909C121332964 @default.
- W60391909 hasConceptScore W60391909C152568617 @default.
- W60391909 hasConceptScore W60391909C15336307 @default.
- W60391909 hasConceptScore W60391909C181833780 @default.
- W60391909 hasConceptScore W60391909C185544564 @default.
- W60391909 hasConceptScore W60391909C192562407 @default.
- W60391909 hasConceptScore W60391909C7910260 @default.
- W60391909 hasLocation W603919091 @default.
- W60391909 hasOpenAccess W60391909 @default.
- W60391909 hasPrimaryLocation W603919091 @default.
- W60391909 hasRelatedWork W1968229416 @default.
- W60391909 hasRelatedWork W2018438132 @default.
- W60391909 hasRelatedWork W2024746812 @default.
- W60391909 hasRelatedWork W2028620059 @default.
- W60391909 hasRelatedWork W2039711911 @default.
- W60391909 hasRelatedWork W2149159857 @default.
- W60391909 hasRelatedWork W1531168717 @default.
- W60391909 hasRelatedWork W1976604495 @default.
- W60391909 hasRelatedWork W2084844818 @default.
- W60391909 hasRelatedWork W2243858491 @default.
- W60391909 hasRelatedWork W2799274059 @default.
- W60391909 hasRelatedWork W2811619650 @default.
- W60391909 hasRelatedWork W2856053434 @default.
- W60391909 hasRelatedWork W2860038250 @default.
- W60391909 hasRelatedWork W2864465326 @default.
- W60391909 hasRelatedWork W2879542114 @default.
- W60391909 hasRelatedWork W2880507925 @default.
- W60391909 hasRelatedWork W2929466714 @default.
- W60391909 hasRelatedWork W2930697862 @default.
- W60391909 hasRelatedWork W3151516832 @default.
- W60391909 hasVolume "75" @default.
- W60391909 isParatext "false" @default.
- W60391909 isRetracted "false" @default.
- W60391909 magId "60391909" @default.
- W60391909 workType "article" @default.