Directory: masses/
File:      matter-density-hfb02.readme (January 15, 2002)
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		     matter-density-hfb02/zxxx.dat

   Neutron and proton density distributions based on the HFB model
	     (provided by S. Goriely on January 15, 2002)
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	 HFB PREDICTION OF THE NUCLEON DENSITY DISTRIBUTIONS

			      S. Goriely
	       Universite Libre de Bruxelles (Belgium)
			       M. Samyn
	       Universite Libre de Bruxelles (Belgium)
			      M. Pearson
	       Universite de Montreal, Quebec (Canada)


Content
--------
Neutron and proton distributions predicted within the
Hartree-Fock-Bogolyubov method based on the BSk2 Skyrme force.  The
10-parameter Skyrme force, along with a 4-parameter delta-function
pairing force (with blocking for odd nuclei) and a 3-parameter Wigner
term, is fitted to all the 1888 measured masses of nuclei with N and Z
>= 8.  All details about the BSk2 force can be found in [1] and about
the HFB model in [2].  The final rms error of this fit is 0.689 MeV
for the 1888 nuclei with Z,N >=8 included in the Audi&Wapstra
compilation of 1995 [3]. The HFB model is also found to give reliable
predictions of nuclear radii. A comparison with the measured radii of
the 523 nuclei in the 1994 data compilation of Nadjakov et al. [4]
shows an rms error of 0.028 fm.

The present HFB-2 compilation of neutron and proton densities includes
all nuclei with N,Z>=8 and Z<=120 between the proton and neutron
driplines. The densities are tabulated in the radius grid ranging from
0.1 to 15 fm in steps of 0.1 fm.


Format
------
Data for all isotopes of a given element are stored in a single file
named after the element atomic number (e.g., z026.dat refers to
Fe). The files are located in the matter-density-hfb02 directory.

Data for each isotope start with a line containing:

   Z   : charge number
   A   : mass number
   El  : element symbol

in the FORTRAN format (' Z=',i4,' A=',i4,2x,a2). This is followed by a title
line and 150 lines with:

   r   : the nuclear radius in [fm] by steps of 0.1 fm
   rhon: the neutron density in [fm^-3]
   rhop: the proton density in [fm^-3]

The corresponding FORTRAN format for the latter 150 lines is (f8.3,2e12.5)


References
----------
[1] S. Goriely, M. Samyn, P.-H. Heenen, J.M. Pearson and  F. Tondeur (2002)
    Phys. Rev. C66, 024326.
[2] M. Samyn, S. Goriely, P.-H. Heenen, J.M. Pearson and  F. Tondeur (2002)
    Nucl. Phys. A700, 142.
[3] G. Audi and A. H. Wapstra (1995) Nucl. Phys. A595, 409
[4] E. Nadjakov, K. Marinova and Y. Gangrsky (1994) Atomic Data and Nucl.
    Data Tables 56, 134.