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BT-1 resolution vs. 2theta
Resolution as FWHM (degrees) as a function of 2theta (degrees), for BT-1 using each of the three monochromators and looking at both the 7' and 15' collimation.
PLEASE NOTE that all our monochromators give data covering the full range of the instrument, 1.3 - 165 degrees in 2theta. The higher end of this plot has been cut for a more detailed look at the lower end of the scale.
Monochromator information
| Monochromator | in-pile Collimation (arcmin) |
Monochr. 2Theta |
Relative Bragg Intensities |
Flux (n s-1cm-2) |
Wavelength (Å) |
Relative # of reflections |
|---|---|---|---|---|---|---|
| Ge(311) | 60' | 75o | 5.78 | 1,160,000 | 2.079 | 50 |
| Ge(311) | 15' | 75o | 2.86 | 570,000 | 2.079 | 50 |
| Ge(311) | 7' | 75o | 1.44 | 290,000 | 2.079 | 50 |
| Cu(311) | 60' | 90o | 1.84 | 870,000 | 1.540 | 100 |
| Cu(311) | 15' | 90o | 1.00 | 440,000 | 1.540 | 100 |
| Cu(311) | 7' | 90o | 0.54 | 230,000 | 1.540 | 100 |
| Ge(733) | 60' | 120o | 0.31 | 330,000 | 1.197 | 200 |
| Ge(733) | 15' | 120o | 0.20 | 200,000 | 1.197 | 200 |
| Ge(733) | 7' | 120o | 0.11 | 120,000 | 1.197 | 200 |