Table 1 Parameters of dark-field images displayed in Fig. 4, cross sections for photoabsorption and inelastic energy loss, and dose, given the stoichiometries listed (see text and Eq. 1 and 2)

Incident intensity (ph/ms)

1.63e+06

1.7e+06

1.50e+06

Exposure dwell time (ms)

50

150

24

Step size (nm)

50

30

60

Total exposure time

8 h 54 m

6 h 40 m

9 h 54 m

Assumed composition

H₃₆C₂₆NO₁₈

H₅₀C₃₀N₉O₁₀S

SiO₂

σ^det (cm²/g)

0.025

0.025

0.027

σ_a (cm²/g)

0.010

0.017

0.051

\({\bar{{{\sigma }}}}_{{{inc}}}\) (cm²/g)

0.016

0.016

0.015

Dose (MGy)

0.81

9.0

0.63

Minimum (black) counts / ms

42

93

40

Maximum (white) counts / ms

173

135

114

Projected density (g/cm3 µm)

33.7

5.7

2.1