Dear Colleague, Starting from cycle 2004/03 (April-May 2005), ISIS has started to offer a "Measure-by-Courier" powder diffraction access mechanism to the GEM diffractometer (XPRESS). This mechanism is aimed at new and infrequent users, research programmes requiring only limited and/or occasional neutron beamtime and chemistry programmes operating a tight loop between synthesis and structural characterisation. A total of 1 beam day per cycle on the GEM powder diffractometer will be devoted to this programme.
Initially, samples will only be measured at room temperature and in standard containers, but access to sample environment is currently being planned.Fully reduced and corrected high-quality data, ready for Rietveld refinement, will be provided to the user, together with example files and guidelines for refinement. The user is expected to carry out the structural analysis with minimal assistance. The next XPRESS run is scheduled for TUESDAY, JULY 19 2005 To access XPRESS and read the full instructions, please follow the link on the ISIS proposal page http://www.isis.rl.ac.uk/applying/. The system is designed to be self explanatory. Your Login ID (email address) and password is the same as for the normal proposal submission. If you are not currently an ISIS user, you will be asked to register on line prior to submission of an XPRESS request. I very much looking forward to receiving your first XPRESS requests. Paolo Radaelli ******************************* Prof. Paolo G. Radaelli Crystallography Group Leader ISIS Facility, Rutherford Appleton Laboratory Chilton, Didcot, Oxfordshire OX11 0QX, United Kingdom Phone: +44-1235-445685 FAX: +44-1235-445642 ***********************************************************
