view article

Figure 3
Calculations for the radiation dose Df to the feature, using the required number of incident photons per pixel [\bar{n}_{\rm pixel}] for δr = 20 nm spatial resolution imaging, as shown in Fig. 2[link]. These calculations are for 2D imaging of copper features in silicon (a) to represent an integrated circuit and for imaging protein features adjacent to ice with over- and underlying layers (Fig. 1[link]) of 70% water/30% ice as tissue (b) to represent a biological specimen. These figures show contour lines for log10(x), so that x = 7 refers to a contour of D = 107; the underlaid grayscale image also displays x. Also shown as a white line is the 1/e attenuation length μ−1(E) of the background material (either silicon or tissue) as a function of photon energy [equation (4)[link]].

Journal logoJOURNAL OF
ISSN: 1600-5767
Follow J. Appl. Cryst.
Sign up for e-alerts
Follow J. Appl. Cryst. on Twitter
Follow us on facebook
Sign up for RSS feeds