ANGULAR AND TIME RESOLUTION OF NEUTRON TIME-OF-FLIGHT SPECTROMETERS

Authors
CREVECOEUR R DESCHEPPER I DEGRAAF L MONTFROOIJ W SVENSSON E CARLILE C
Citation
R. Crevecoeur et al., ANGULAR AND TIME RESOLUTION OF NEUTRON TIME-OF-FLIGHT SPECTROMETERS, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 356(2-3), 1995, pp. 415-421
Citations number
9
Categorie Soggetti
Nuclear Sciences & Tecnology","Physics, Particles & Fields","Instument & Instrumentation",Spectroscopy
Journal title
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment → ACNP
ISSN journal
01689002
Volume
356
Issue
2-3
Year of publication
1995
Pages
415 - 421
Database
ISI
SICI code
0168-9002(1995)356:2-3<415:AATRON>2.0.ZU;2-X
Abstract
We show that the angular resolution Delta phi and time resolution Delt a t of neutron time-of-flight spectrometers can be determined accurate ly by measuring the scattering spectrum of superfluid He-4 at low temp erature. The method is used to determine Delta phi and Delta t of the IRIS spectrometer at ISIS (UK), yielding the values (FWHM) Delta phi = 0.118 rad (6.8 degrees) and Delta t = 212 mu s, and to reinterpret th e results of Blagoveshchenskii et al., showing that their measured lin ewidths for superfluid He-4 can be ascribed solely to the effect of th e angular resolution of their time-of-flight spectrometer.