The ABC of powder diffractometer detector coverage

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dc.contributor.authorAndersen, KHen_AU
dc.contributor.authorBentley, PMen_AU
dc.contributor.authorCussen, LDen_AU
dc.date.accessioned2011-09-21T04:36:31Zen_AU
dc.date.available2011-09-21T04:36:31Zen_AU
dc.date.issued2011-04-01en_AU
dc.date.statistics2011-09-21en_AU
dc.description.abstractThis article addresses the question of the most effective detector configuration for neutron spectrometers using a discussion of a particular case - constant-wavelength powder diffractometers at continuous neutron sources. A first variation uses an essentially one-dimensional `banana' detector coupled with out-of-scattering-plane beam divergence before and after the sample. A second variation uses an incident beam tightly defined both in- and out-of-plane coupled to a `4 pi' detector covering all possible scattering angles after the sample. It is widely believed that the 4 pi arrangement is superior for most varieties of neutron spectrometer but is more difficult and more expensive to implement. Starting from a commonly used overall instrument figure-of-merit, this article presents simple arguments leading to the surprising conclusion that this is untrue for these constant-wavelength powder diffractometers, provided only that the cylindrical samples used with the banana detector have a height greater than 2.4 times their diameter. © 2011, Wiley-Blackwell.en_AU
dc.identifier.citationAndersen, K.H., Bentley, P.M., Cussen, L.D. (2011). The ABC of powder diffractometer detector coverage. Journal of Applied Crystallography, 44(Part 2), 295-298. doi:10.1107/S0021889811005498en_AU
dc.identifier.govdoc3413en_AU
dc.identifier.issn0021-8898en_AU
dc.identifier.issuePart 2en_AU
dc.identifier.journaltitleJournal of Applied Crystallographyen_AU
dc.identifier.pagination295-298en_AU
dc.identifier.urihttp://dx.doi.org/10.1107/S0021889811005498en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/3762en_AU
dc.identifier.volume44en_AU
dc.language.isoenen_AU
dc.publisherWiley-Blackwellen_AU
dc.subjectDiffractometersen_AU
dc.subjectRadiation detectorsen_AU
dc.subjectPowdersen_AU
dc.subjectNeutron spectrometersen_AU
dc.subjectCylindrical configurationen_AU
dc.subjectScatteringen_AU
dc.titleThe ABC of powder diffractometer detector coverageen_AU
dc.typeJournal Articleen_AU
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