Re: [ccp4bb] Wavelength of Copper Kalpha

2007-10-11 Thread James Holton
I don't know what it is to 6 decimal places, and I'm pretty sure it isn't known. The sixth decimal place for ~8 keV is 0.008 eV, which is about the energy of a thermally-induced vibration. Changes in chemical environment of the copper atom (and hence the "starting energy" of the electron that f

Re: [ccp4bb] Wavelength of Copper Kalpha

2007-10-10 Thread Santarsiero, Bernard D.
On Wed, October 10, 2007 11:50 am, Bryan W. Lepore wrote: > On Wed, 10 Oct 2007, Jim Pflugrath wrote: >> It has come to my attention that the wavelength of a Copper Kalpha may >> have changed over the years. At least this appears to be true if you >> look at the International Tables. > > the 'natu

Re: [ccp4bb] Wavelength of Copper Kalpha

2007-10-10 Thread Bryan W. Lepore
On Wed, 10 Oct 2007, Jim Pflugrath wrote: It has come to my attention that the wavelength of a Copper Kalpha may have changed over the years. At least this appears to be true if you look at the International Tables. the 'natural' isotopic distribution must have changed, as it has with the bi

[ccp4bb] Wavelength of Copper Kalpha

2007-10-10 Thread Jim Pflugrath
It has come to my attention that the wavelength of a Copper Kalpha may have changed over the years. At least this appears to be true if you look at the International Tables. What is the currently approved wavelength in Angstrom of a Copper Kalpha X-ray produced by a X-ray generator with a cop