Author/Authors :
Wang، نويسنده , , Junyue and Zhu، نويسنده , , Peiping and Yuan، نويسنده , , Qingxi and Huang، نويسنده , , Wanxia and Shu، نويسنده , , Hang and Chen، نويسنده , , Bo and Li، نويسنده , , Enrong and Liu، نويسنده , , Yijin and Hu، نويسنده , , Tiandou and Wu، نويسنده , , Ziyu، نويسنده ,
Abstract :
This contribution investigates the effect on the imaging contrast of the small angle scattering and of the rocking curve in the entire angular range. We show that based on the small angle scattering properties, the reflectivity of the crystal analyzer and the rocking curve of the monochromator–analyzer, in a diffraction enhanced imaging (DEI) experimental setup the contrast of the image collected at the top of the rocking curve is always higher than that of the apparent absorption image. Moreover, our experimental data confirm that the quality of a refraction image is superior to a refraction-like image. In order to understand the observed behavior we introduce and discuss the contribution of a new term in the classical DEI equation.
