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Figure 11
The published 14.4 keV wavelength and their uncertainties. The three filled squares and their error bars are Bearden's results with different Å* to Å conversion factors in 1967, 1969 and 1986. His measurement was carried out in the 1960s using a γ-ray source and crystals of calcite and quartz. The filled circle in 1988 is Siddon's result without uncertainty information. The values in 1991 and 1999 are our results with uncertainties of 10 p.p.m. and 0.6 p.p.m., respectively. The measurements after the 1980s were carried out using synchrotron radiation and silicon crystals.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 7| Part 3| May 2000| Pages 189-195
doi:10.1107/S0909049500003757
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