
TY  - JOUR
A1  - Mackenzie, JK 
A1  - McL Mathieson, A 
T1  - The Experimental Value of f(220) for Copper
JF  - Australian Journal of Physics
JO  - Aust. J.  Phys.
Y1  - 1984
VL  - 37
IS  - 6
SP  - 651
EP  - 656
KW  - 
UR  - https://doi.org/10.1071/PH840651 
N2  - The value of the atomic form factor, /(220), for copper has been determined in recent years by a variety of methods. All the dynamical methods agree on a value in the region of 16'70-16·75. These methods include two X-ray methods, one involving measurement of intensity profiles and the other of Pendellosung beats, and also an electron diffraction measurement using a critical voltage procedure. By contrast, two recent kinematical measurements using y rays both report a distinctly different value of about 16·45. One of these determinations has already been re-examined by the present authors and the iscrepancy removed by an appropriate extrapolation to zero extinction. 
ER  -

