화학공학소재연구정보센터
Materials Science Forum, Vol.363-3, 673-675, 2001
Deconvoluting double Doppler spectra
The successful deconvolution of data from Double Doppler Broadening of Annihilation Radiation (D-DBAR) Spectroscopy is a promising area of endeavour aimed at producing momentum distributions of a quality comparable to those of the angular correlation technique. The deconvolution procedure we test in the present study is the constrained generalized least square method. Trials with computer simulated DDBAR spectra are generated and deconvoluted. in order to find the best form of regularizer and the regularization parameter. For these trials the Neumann (reflective) boundary condition is used to give a single matrix operation in Fourier space. Experimental D-DBAR spectra are also subject to the same type of deconvolution after having carried out a background subtraction and using a symmetrize resolution function obtained from an Sr-85 source with wide coincidence windows.