Photon-activation analysis for carbon and oxygen.
A method is described for the determination of carbon and oxygen in organic materials by means of the reactions (12)C(gamma, n)(11)C and (16)O(gamma, n)(15)O. Samples are irradiated with bremsstrahlung from a 32-MeV electron beam impinging on a tungsten target, and the active products are separated before the positron annihilation gamma rays are counted. Limits of detection of 0.003 mug of carbon and 0.1 mug of oxygen are obtained.
Baker
C A
CA
Analytical Sciences Division, A.E.R.E. Harwell, Didcot, Berks., U.K.
Williams
D R
DR