FENDL/C-2.0 CHARGED PARTICLE SUBLIBRARY
                              (PROCESSED)

                Description of contents and format 

The files TDFA.DAT and TDFB.DAT begin with the list of 
physical constants, and properties (nuclear masses, Q-value, etc.) 
of particles participating in the reaction (sections (2)-(4)). 

In section (5) there is a tabulation of <sigma-v> values (in b-cm/s) 
vs. temperature (kT, in MeV). The last column in that tabulation 
(labeled "EXTR") is the average total incoming energy (in MeV) at each 
temperature, given by <Etot sigma-v>/<sigma-v>.

The next part of the file gives tabulations of the Maxwellian-averaged 
spectrum in the laboratory system for each of the outgoing particles, 
as a function of temperature. The temperatures in this part of the file 
do not have to be same as those given in the <sigma-v> tabulation.

Section (6) lists values at which the spectrum was "cut"  in order to 
determine the energies at which the spectrum is tabulated (given as 
fractions of the maximum value). Since each cut projects on two energies, 
in addition to the maximum, there are 2*N+1 energies tabulated for N cuts 
(labeled "SPECTRUM LEVELS").

Line (7) gives (for each temperature) the outgoing-particle number and  
number of laboratory energies at which spectrum is tabulated.  "AREA" is 
the numerical energy integral of the spectrum (should be unity), 
scaled by the value of <sigma-v> at that temperature "SIGVB".

The spectrum follows in section (8). For each outgoing-particle  
energy (MeV in laboratory) its "SPECTRUM" (in 1/MeV) is tabulated, 
as given by the expression:

       <dN/dE> = sqrt(2)/pi M'^(3/2)/sqrt(m1 m2 m3 m4)
                  int_0^infty {de/(kT)^2 e sigma(e)/sqrt(e+Q)
                    [exp(-J1) - exp(-J2]}.
Here
       J1/2 = e/(kT) + M'/(M m3 kT) [sqrt(M'E) +/-
                                     sqrt(m4(e+Q))]^2,
and    M = m1+m2, M' = m3+m4.

This expression was first derived by Talley and Hale in their contribution 
to the 1988 Mito Nuclear Data Conference [Ref. 1]. 

The final column in this tabulation, labeled "INTEGRAL" gives the partial 
integral of the spectrum from E=0 to the tabulated energy for energies up to 
maximum of the spectrum.  For energies above the maximum, the definition 
switches to the partial integral from E=infty to the tabulated value, so 
that those contributions are negative. These partial integrals correspond 
to unit normalization of the spectrum over all energies, as mentioned 
above.  Sections (7) and (8) are repeated for all outgoing particles at each 
temperature in the spectrum grid.

The following comments apply only to the 1-H-3(d,n)2-He-4 data 
file. A temperature grid has been chosen for the 
<sigma-v> tabulation that is linear in log(kT), giving (the same) 10 points 
per decade in the tabulated range 10^(-4) to 1 MeV.  The spectra are 
tabulated at every second one of these temperatures, making their grid a 
subset of the <sigma-v> grid.

The "SPECTRUM LEVELS" (cuts) in the tabulation are only approximate, 
since this prescription has not been used to establish the outgoing-particle 
energy grid. The grid is chosen to be linear in sqrt(E), with 5 points on 
either side of the energy of the spectral maximum.

The quantities "AREA" and "INTEGRAL" were computed analytically between 
the tabulated energies, using the functional form

      <dN/dE> = A sqrt(E) exp[-(sqrt(E) - B)^2/C]

to give 3-point interpolation in each interval, and also to extrapolate 
above and below the range of the tables.  The accuracy obtained for these 
integrals indicates that this functional form is suitable for interpolating 
and extrapolating table entries for the spectra. 


References:

1)    T.L. Talley, G.M. Hale, Proceedings of the International 
      Conference on Nuclear Data for Science and Technology, Mito, 
      Japan, May/June 1988,  pp. 299-302.