SUMMAR OF DISCUSSIONS OF USES OF THE ADVANCED LIGHT SOURCE (ALS)FOR EARTH SCIENCES RESEARCH: WORKSHOP REPORT OF THE ALS USERS'ASSOCIATION ANNUAL MEETING, LAWRENCE BERKELEY LABORATORY, BERKELEY,CA,JUNE 2-3, 1988
A workshop to discuss opportunities for research using the Advanced Light Source (ALS) was held as a part of the first annual ALS users meeting at the Berkeley Convention Center, Berkeley, California, June 2--3, 1988. The participants were from university and governmental laboratories, and some of those attending had had experience using synchrotron light sources. Because the Earth Science interests had not been voiced or considered in previous workshops or meetings of the ALS groups, it was the principal task of the group to explore the capabilities of the ALS appropriate to the Earth Sciences, to identify areas of research where the ALS would be of significant benefit, and to provide input regarding desired insertion devices. Discussions of synchrotron radiation phenomena and applications of synchrotron radiation in earth sciences have been highlighted in the literature and in a recent report of a workshop held at Argonne National Laboratory. A summary outline of some typical potential uses and the information to be gained from the use of synchrotron radiation is given. This is not an exhaustive list of earth sciences applications, but indicates the breadth of applications that can be addressed: (A) X-Ray Absorption Near Edge Structure (XANES) Spectroscopy (Oxidation state of elements; Coordination number of metal ions); (B) Extended X-Ray Absorption Fine Structure (EXAFS) Spectroscopy (Glasses and other disordered structures; Solutions; Gels -- silicates, aluminates; Clays -- swelling phenomena, intercation chemistry; Adsorption -- speciation, chemical reactions, kinetics; Polyhedral linkages -- Fe, Mn oxides); (C) Energy Dispersive X-Ray Diffraction (Mineral transformations vs temperature and pressure); (D) Small Angle Scattering (Precipitation phenomena); (E) X-Ray Microprobe (Element mapping). Comments and discussion at the ALS meeting identified the principal areas of interest for earth scientists as: adsorption phenomena; nucleation processes; gel structure; reaction mechanisms; and temperature and diffusion effects.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USAEC
- DOE Contract Number:
- DE-AC02-05CH11231
- OSTI ID:
- 929658
- Report Number(s):
- LBL-26138; TRN: US200822%%999
- Country of Publication:
- United States
- Language:
- English
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