The files titled dW_EQ.pl contain the dependences of inverse differential inelastic mean free path of fast electrons, dW(E, Q)/dQ (in cm^{-1} eV^{-1}), in a solid with given composition on the initial electron energy E (in eV) and the energy loss Q (in eV). The energy E varies from 5 to 30000 eV, the energy loss Q -- from 0.01 eV to Q_{max} which is the maximum possible energy loss for given E and material.
The file is arranged as a set of string groups. Each group has three strings of numerical values separated by semicolons. Each string bigens from a new line with an appropriate descriptor (tag). The group structure looks as follows:
Descriptor | Numerical value | ||||
---|---|---|---|---|---|
E = | E_{n} | ||||
Q = | Q_{1} | ... | Q_{n} | ... | Q_{max} |
dW = | dW (E_{n} , Q_{1})/dQ | ... | dW (E_{n} , Q_{n})/dQ | ... | dW (E_{n} , Q_{max})/dQ |
The files titled W_E.pl contain the dependences W(E) of the inverse total inelastic mean free path (in cm^{-1}) of fast electrons in a solid with given composition on the incident electron energy E (in eV).
The file is arranged as a two-column table, beginning with appropriate descriptors. A calculated function and its argument are placed in the positions corresponding to white cells of the table below.
E_{1} | W(E_{1}) |
... | ... |
E_{n} | W(E_{n}) |
The files titled R_qE.pl contain the function R(q, E) -- the dependence of the probability of the inelastic scattering with energy loss under Q on the incident electron energy E (in eV) and the ratio q = Q/Q_{max}. Here Q and Q_{max} are, respectively, the current and maximum possible electron energy losses through inelastic interaction for a given incident electron energy and material.
E | R(q, E) at q = | ||||
---|---|---|---|---|---|
q_{1} | ... | q_{n} | ... | 1 | |
E_{1} | R(q_{1}, E_{1}) | .... | .... | .... | .... |
... | ... | ... | ... | ... | ... |
E_{k} | .... | .... | R(q_{k}, E_{n}) | ... | ... |
... | ... | ... | ... | ... | ... |
E_{N } | ... | ... | ... | ... | R(1 , E_{N}) |
The files titled q_RE.pl contain parameters for analytical approximation of the q (R, E) dependence which is inverse to R (q, E). This dependence is approximated by a function of the parameters a (E), b (E), g (E), p (E) and m (E), described in General relations page.
The whole range of energies for which the calculations have been performed is divided into several intervals. Within each of them the parameter m which determines the general form of the fitting function F (a, b, g, p, m, R) is constant, but it may vary from one interval to another. The boundaries of intervals depend on the material of the target.
The file is arranged as a seven-column table beginning with appropriate descriptors. The calculated parameters and their arguments are placed in the positions corresponding to white cells of the table below. d is the integral relative error of approximation.
E | a | b | g | p | m | delta |
---|---|---|---|---|---|---|
E_{1} | a (E_{1} ) | b (E_{1} ) | g (E_{1} ) | p (E_{1} ) | m (E_{1} ) | d (E_{1} ) |
... | ... | ... | ... | ... | ... | ... |
E_{n} | a (E_{n} ) | b (E_{n} ) | g (E_{n} ) | p (E_{n} ) | m (E_{n} ) | d (E_{n} ) |
... | ... | ... | ... | ... | ... | ... |
E_{N} | a (E_{N} ) | b (E_{N} ) | g (E_{N} ) | p (E_{N} ) | m (E_{N} ) | d (E_{N} ) |