1. Jeremiah Horrocks Institute for Mathematics, Physics and Astronomy, University of Central Lancashire, Preston PR1 2HE, U.K.
2. Department of Materials Science, Photon Science Institute and Henry Royce Institute, University of Manchester, Manchester M13 9PL, U.K.
3. Department of Chemical Engineering and Analytical Science, University of Manchester, Manchester M13 9PL, U.K.
4. Diamond Light Source, Didcot OX11 0DE, U.K.