School of Physics  Research Publications
http://hdl.handle.net/11343/309
20200117T09:17:24Z

Sounds Discordant: Classical Distance Ladder and ΛCDMbased Determinations of the Cosmological Sound Horizon
http://hdl.handle.net/11343/227003
Sounds Discordant: Classical Distance Ladder and ΛCDMbased Determinations of the Cosmological Sound Horizon
Aylor, K; Joy, M; Knox, L; Millea, M; Raghunathan, S; Wu, WLK

Modelling the inelastic scattering of fast electrons
http://hdl.handle.net/11343/52385
Modelling the inelastic scattering of fast electrons
Allen, LJ; D'Alfonso, AJ; Findlay, SD
Imaging at atomic resolution based on the inelastic scattering of electrons has become firmly established in the last three decades. Harald Rose pioneered much of the early theoretical work on this topic, in particular emphasising the role of phase and the importance of a mixed dynamic form factor. In this paper we review how the modelling of inelastic scattering has subsequently developed and how numerical implementation has been achieved. A software package mu STEM is introduced, capable of simulating various imaging modes based on inelastic scattering in both scanning and conventional transmission electron microscopy.
20150401T00:00:00Z

Coherence properties of light propagated through a scattering medium
http://hdl.handle.net/11343/34569
Coherence properties of light propagated through a scattering medium
Aruldoss, C. K.; Dragomir, N.; Nugent, K. A.; Roberts, A.
Partiallycoherent, quasimonochromatic optical fields are fully described by their Mutual Optical Intensity (MOI) or the phasespace equivalent, the Generalised Radiance (GR). This paper reports on the application of a propagationbased phasespace tomographic technique for determining both the MOI and the GR of wavefields. This method is applied to the reconstruction of the MOI and the GR of an optical wavefield propagated through a suspension of ~10 μm diameter polystyrene spheres.
20040101T00:00:00Z

An algebraic solution of the multichannel problem applied to low energy nucleonnucleus scattering
http://hdl.handle.net/11343/34081
An algebraic solution of the multichannel problem applied to low energy nucleonnucleus scattering
Amos, K.; Canton, L.; Pisent, G.; Svenne, J. P.; van der Knijff, D.
Compound resonances in nucleonnucleus scattering are related to the discrete spectrum of the target. Such resonances can be studied in a unified and general framework by a scattering model that uses sturmian expansions of postulated multichannel interactions between the colliding nuclei. Associated with such expanded multichannel interactions are algebraic multichannel scattering matrices. The matrix structure of the inherent Green functions not only facilitates extraction of the subthreshold (compound nucleus) bound state spinparity values and energies but also readily gives the energies and widths of resonances in the scattering regime. We exploited also the ability of the sturmianexpansion method to deal with nonlocal interactions to take into account the strong nonlocal effects introduced by the Pauli principle. As an example, we have used the collective model (to second order) to define a multichannel potential matrix for low energy neutronC12 scattering allowing coupling between the 0+ (ground), 2+ (4.4389 MeV), and 0+ (7.64 MeV) states. The algebraic S matrix for this system has been evaluated and the subthreshold bound states as well as cross sections and polarizations as functions of energy are predicted. The results are reflected in the actual measured data, and are shown to be consistent with expectations as may be based upon a shell model description of the target and of the compound nucleus.
This is a preprint version published in Nuclear Physics A © 2003 Elsevier. http://www.elsevier.com/wps/find/journaldescription.cws_home/505715/description#description
20030101T00:00:00Z