High luminosity time of flight with polarisation analysis: CeCu6

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dc.contributor.authorHarker, SJen_AU
dc.contributor.authorHicks, TJen_AU
dc.contributor.authorKennedy, SJen_AU
dc.contributor.authorYu, DHen_AU
dc.date.accessioned2008-04-23T05:56:51Zen_AU
dc.date.accessioned2010-04-30T05:02:46Zen_AU
dc.date.available2008-04-23T05:56:51Zen_AU
dc.date.available2010-04-30T05:02:46Zen_AU
dc.date.issued2007-07-15en_AU
dc.date.statistics2007-07en_AU
dc.description.abstractThe magnetic excitation spectrum of the heavy fermion system CeCu6 has been obtained by pseudo-randomly chopping the polarisation of the beam on LONGPOL and measuring the time of flight with polarisation analysis before the detectors. Separation of the magnetic part of the spectrum was made by changing the polarisation direction at the specimen. This method achieves a greater luminosity at the specimen compared with conventional methods at the expense of a background proportional to the total scattering from the specimen. The form of the spectrum is as expected with two transitions and considerable inelastic intensity centred oil zero energy transfer. The crystal field spectrum of the Ce3+ ion is considerably broadened by the Kondo nature of the system. An analysis of the experimental accuracy was made based on the statistical variation between the runs which make up the experiment. LONGPOL is a very slow instrument, based as it is on a thermal source with an incident wavelength of 3.6 A. The demonstrated possibility to obtain a spectrum incorporating polarisation analysis provides a basis to evaluate the usefulness of future implementation. © 2007, Elsevier Ltd.en_AU
dc.identifier.citationHarker, S. J., Hicks, T. J., Kennedy, S. J., & Yu, D. H. (2007). High luminosity time of flight with polarisation analysis: CeCu6. Paper presented to the Sixth International Workshop on Polarised Neutrons in Condensed Matter Investigations (PNCMI 2006), 25-28 September 2006, Berlin, Germany. In Pappas, C., Prokes, K., Siemensmeyer, K., & Wiedenmann, A. (Eds), Physica B: Condensed Matter, 397(1-2), 15-19. doi:10.1016/j.physb.2007.02.069en_AU
dc.identifier.conferenceenddate28 September 2006en_AU
dc.identifier.conferencenameSixth International Workshop on Polarised Neutrons in Condensed Matter Investigations (PNCMI 2006)en_AU
dc.identifier.conferenceplaceBerlin, Germanyen_AU
dc.identifier.conferencestartdate25 September 2006en_AU
dc.identifier.editorsPappas, C., Prokes, K., Siemensmeyer, K., & Wiedenmann, A.en_AU
dc.identifier.govdoc1174en_AU
dc.identifier.issn0921-4526en_AU
dc.identifier.issue1-2en_AU
dc.identifier.journaltitlePhysica B: Condensed Matteren_AU
dc.identifier.pagination15-19en_AU
dc.identifier.urihttp://dx.doi.org/10.1016/j.physb.2007.02.069en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/1116en_AU
dc.identifier.volume397en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectFermionsen_AU
dc.subjectCrystal fielden_AU
dc.subjectPolarizationen_AU
dc.subjectTime-of-flight spectrometersen_AU
dc.subjectScatteringen_AU
dc.subjectNeutronsen_AU
dc.titleHigh luminosity time of flight with polarisation analysis: CeCu6en_AU
dc.typeConference Paperen_AU
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