[en] Work at the Daresbury SRS has of necessity been interrupted this year (1991/92) due to the incorporation of Wiggler II. However, considerable beamtime was awarded before the shutdown and the major part of this appendix is concerned with the progress reports of the research undertaken then. The reports have been organised under the following broad headings: Molecular Science (19 papers), Surface and Materials Science (169 papers), Biological Science (85 papers), Instrumental and Technique Developments (13 papers) and Accelerator Physics (3 papers). It is hoped that in time the number of contributions on accelerator physics will grow to reflect the in-house activity on, for example, accelerator improvement and design. The research reports are preceded by the Annual Report of the Synchrotron Radiation Facilities Committee, which outlines the research highlights identified by that Committee (also included are details of the current membership of the SRFC and the chairmen of the Beamtime Allocation Panels). Following the reports are the specifications for the beamlines and stations. This year Section 3 contains 289 reports (nearly 100 more than last year) and the number of publications, generated by scientists and engineers who have used or are associated with Daresbury Laboratory facilities, has topped 500 for the first time. (author)

No abstract available

[en] Full text: 4GLS is a suite of accelerator-based light sources planned to provide state-of-the-art radiation in the low energy photon regime. Superconducting energy recovery linac (ERL) technology will be utilised in combination with a variety of free electron lasers (IR to XUV), undulators and bending magnets. The 4GLS undulators will be optimised to generate spontaneous high flux, high brightness radiation, of variable polarisation, from 3-100 eV. However, they will also generate usable radiation (in the higher harmonics) up to around 800 eV. The ERL technology of 4GLS will allow shorter bunches and higher peak photon fluxes than possible from storage ring sources. It will also give users the added bonuses of pulse structure flexibility and effectively an infinite beam lifetime. VUV and XUV FELs will be used to generate short pulses (in the fs regime) of extreme ultraviolet light that is broadly tuneable and more than a million times more intense than the equivalent spontaneous undulator radiation. A strong feature of the scientific programme planned for 4GLS is dynamics experiments in a wide range of fields. Pump probe experiments will allow the study of chemical reactions and short-lived intermediates on the timescale of bond breaking and bond making, even for very dilute species. The high intensity of the FEL radiation will allow very high resolution in imaging applications. Funding for the first three years of the 4GLS project was announced by the UK Government in April 2003. This includes the research and development work necessary to produce a design study report, with the construction of an ERL-prototype. It is anticipated that the full facility will be available to users in 2010. Copyright (2005) Australian Institute of Physics

[en] This monograph is concerned with the chemistry of ruthenium and thus covers the fields of coordination chemistry, organometallic chemistry, structural chemistry (of both molecular and extended lattices), spectroscopy, kinetics, electrochemistry and photochemistry as related to the compounds of ruthenium. Particular emphasis is placed throughout on synthesis, reactivity and structure. It provides an essentially comprehensive coverage of the chemistry of ruthenium from 1804 to 1978 inclusive, plus many references from 1979. The literature for 1979 and 1980 has been published as two separate reviews in Coordination Chemistry Reviews, thus keeping the coverage up-to-date. The material is arranged in chapters according to oxidation state (formal) and within each chapter according to the group of the donor atom of the principal ligand. A chapter discussing the oxidation state concept and introducing an exciting new concept, the Greens' MLX scheme, has been included. Carbonyl cluster complexes, nitrosyl derivatives, and the photochemistry and photophysics of tris(2,2'-bipyridine)ruthenium(II), and related complexes are also dealt with in separate chapters. (Auth.)

[en] The pressure broadening of individual hyperfine lines of molecular iodine has been studied using polarisation spectroscopy to resolve individual hyperfine lines. Total and average inelastic reorientation cross sections have been evaluated for I₂-He and I₂-Xe. Marked differences are observed between the cross sections, both in the limiting values at high J values and in their J dependence at low J values. These differences are related to the duration of the rare-gas-iodine-molecule interaction and to the strength of the intermolecular potential. The spin rotation constant Csub(I) is found to have an inverse J''(J''+1) dependence which is attributed to mixing of the B³PI⁺sub(Oμ) state with the 1sub(μ) state. (author)

[en] Full text: 4GLS is a suite of accelerator-based light sources planned to provide state-of-the-art radiation in the low energy photon regime. Superconducting energy recovery linac (ERL) technology will be utilised in combination with a variety of free electron lasers (IR to XUV), undulators and bending magnets. The 4GLS undulators will be optimised to generate spontaneous high flux, high brightness radiation, of variable polarisation, from 3-100 eV. However, they will also generate usable radiation (in the higher harmonics) up to around 800 eV. The ERL technology of 4GLS will allow shorter bunches and higher peak photon fluxes than possible from storage ring sources. It will also give users the added bonuses of pulse structure flexibility and effectively an infinite beam lifetime. VUV and XUV FELs will be used to generate short pulses (in the fs regime) of extreme ultraviolet light that is broadly tuneable and more than a million times more intense than the equivalent spontaneous undulator radiation. A strong feature of the scientific programme planned for 4GLS is dynamics experiments in a wide range of fields. Pump probe experiments will allow the study of chemical reactions and short-lived intermediates on the timescale of bond breaking and bond making, even for very dilute species. The high intensity of the FEL radiation will allow very high resolution in imaging applications. Funding for the st three years of the 4GLS project was announced by the UK Government in April 2003. This includes the research and development work necessary to produce a design study report, with the construction of an ERL-prototype. It is anticipated that the full facility will be available to users in 2010

[en] An apparatus for spin-polarized photoemission experiments upon ferromagnetic materials is described. The instrument incorporates a hemispherical analyzer (with input lens stack) for angle selection (± 3⁰ ) and energy discrimination (resolution better than 100 meV), and a high-energy Mott detector for spin analysis. It is designed for use with linearly polarized synchrotron radiation in the energy range 5-85 eV emergent from a toroidal grating monochromator optical system. (orig.)

[en] The fourth generation light source, 4GLS, exploits high brightness electron beam and Energy Recovery Linac (ERL) technology to provide ultra-bright photon beams from infra-red to XUV with pulse lengths down to the femtosecond regime. The suite of light sources covers three free-electron lasers (FELs) and conventional spontaneous radiation from undulators and bending magnets. Two cavity-based lasers will provide infra-red and vacuum-ultraviolet radiation with a high gain, single pass FEL for XUV radiation from 10 - 100 eV. The science case for 4GLS has passed peer review in 2002. This paper will provide an update on the status of the project as it moves towards the detailed design phase. It will also review the technological challenges for the accelerator and experiment systems

[en] Spin-resolved photoemission from FeB and CoB binary amorphous alloys has been measured using, for the first time, a synchrotron radiation source. A comparison of the experimental results with several ab initio calculations on two model systems Fe₈₀B₂₀ and Co₇₇B₂₃ shows that the spin-resolved photoemission provided a critical test of theoretical models, and gives insight into the spin-dependent electronic structures of these materials.copyright 1997 American Institute of Physics

[en] The first spin-resolved photoemission experiment on an iron - boron amorphous alloy using a synchrotron source is presented. The experimental spin polarization of the d band of Fe₈₀B₂₀ has been compared with three theoretical predictions and found to be in best agreement with self-consistent spin-polarized calculations based on a supercell LMTO approach. The observed average spin polarization of the valence band is approximately twice that of 10 eV secondary electrons. Hysteresis loops for Fe₈₀B₂₀ determined from the 1 eV and 20 eV secondary-electron asymmetry are similar to those determined using the magnetooptic Kerr effect, but show a lower coercivity. The differences are attributed to a combination of different sampling depths of the two techniques and to the surface inhomogeneity of the sample. (author)