Directory: fission/
File:      fis-barrier-exp.readme (April 30, 2002)
*******************************************************


                        fis-barrier-exp.dat

		      Fission barrier parameters
	    (provided by A. V. Ignatyuk on April 30, 2002)
            **********************************************

	       
Content
-------
Fission barrier parameters recommended for the trans-thorium nuclei by
V.M.Maslov [1] and for the pre-actinides by G.N.Smirenkin [2]. The
fission barrier parameters are strongly correlated with the
corresponding level density description and the symmetry of the
fission barriers should always be taken into account for the
consistent description of fission cross sections.

For nuclei with Z<80 the liquid drop barriers described by Sierk's
code [3] are recommended with the addition of the ground-state shell
corrections estimated by the Moeller-Nix (Segment 1) or the
Myers-Swiatecki (Segment 5) mass formulae.

More details on fission level densities are given in Chapter 7 of the
RIPL-2 Handbook.


Format
------
Each record of the file contains:

   Z   : charge number of the fissioning nucleus
   A   : mass number of the fissioning nucleus
   El  : element symbol of the fissioning nucleus
   Ea  : inner barrier height in MeV
   SymA: symmetry of the inner-barrier saddle point
   Eb  : outer barrier height in MeV
   SymA: symmetry of the outer-barrier saddle point
   Delf: correlation function of the fission channel recommended
           for the fission level density calculation in MeV

The corresponding FORTRAN format is (2(i3,1x),a2,2(f8.3,4a),f9.3)


References
----------
[1] V. M. Maslov. RIPL-1 Handbook. TEXDOC-000, IAEA, Vienna, 1998, Ch. 5.
[2] G. N. Smirenkin. IAEA-Report INDC(CCP)-359,IAEA, Vienna, 1993.
[3] A. Sierk. Phys. Rev. C33 (1986) 2039.