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Figure 1
Separation between the EXAFS (SRO) and XANES (LRO) regions for the boron K-edge of cubic BN. The path expansion calculation (dot–dashed line) fails to converge to the full MS result (solid line) below 50 eV above the edge. It is expected to fail once the largest eigenvalue (dashed line) is larger than unity. MS order (dots), needed to converge to within 1% using the Lanczos iterative technique (reduced by a factor of eight to show on the same plot).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 10| Part 5| August 2003| Pages 366-368
doi:10.1107/S0909049503009130
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