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                Optical model potential parameters
  (Original file name CENPL_OMP2.DAT, provided by Z. SU, 25 March 1995)
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         DATA FILE OF OPTICAL MODEL PARAMETER SUB-LIBRARY (CENPL-OMP)
             Nucleus-Specific Optical Model Potential Parameter Sets
                        
                     Su Zongdi  Sun Zhengjun  Wang Chenxiang 
      (China Nuclear Data Centre, CIAE, P.O.BOX 275-41, Beijing 102413)
                            Yu Ziqiang  Zuo Yixin           
                        (Dept. of Phys., Nankai Univ.)
                                 Ma Gonggui
                   (Inst. Nucl. Sci. & Tech., Sichuan Univ.)
CONTENTS 
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This data file  is the second part of  data file  of the optical model 
parameter sublibrary (OMP) of the Chinese Evaluated Nuclear Parameter 
Library (CENPL). The optical model potential parameter (OMPP) sets of 
nucleus(or nuclei)-specific for neutron projectile only are collected and 
compiled in this data file. 
The relevant references are listed in omp2.dat file. At present, this data 
file only contains the OMPP sets used in CENDL-1,2.
A brief information on each set of OMPP and its potential parameters are 
listed.  It contains target nucleus (or nuclei), neutron incident energy 
region, spherical or deformed (S/D), the types of fitting experimental data 
and making model calculations , deformed parameter and standard abbreviation 
of reference.
A standard form of the optical model potential  and relevant parameters are 
given by
 -U(r,E) = Vr*fr(r,rr,ar)
           +i{-4*ad*Wd*[dfd(r,rd,ad)/dr]+Wg*exp[-Xg**2] + Wv*fv(r,rv,av)}
           2/r*(l*s)*{Vso*[dfso(r,rso,aso)/dr + iWso*[dfso(r,r'so,a'so)/dr]} 
 where
       Vi = Vi0 + Vi1*E+Vi2*E*E+(Vi3+Vi4*E)*(N-Z)/A, i=r, so
       Wi = Wi0+Wi1*E+Wi2*E*E+(Wi3+Wi4*E)*(N-Z)/A, i=d, g,v,so
       fi(r,ri,ai) = 1/[1+exp(Xi)]
       Xi = (r-Ri)/ai
       Ri = (ri0+ri1*E)*A**(1/3)+Ci
       ai = ai0+ai1*E
        i = r, g, d, v, so
            
FORMAT
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The first line  for each set of OMPP  in the file contains the following 
information:
  Z  : the charged number of target nucleus, column 1-3.
  EL : the element symbol of target nucleus, column 4-5.
  A  : the mass number of target nucleus, column 6-22.
        For natural isotopic composition, A=0 . This set of OMPP is obtained 
        by fitting the experimental data of natural isotopic composition.
  Energy region : in MeV, column 23-44.
  Spherical or deformed(S/D) : column 45-46.
  Types of fitting experimental data and making model calculations:
        They include total cross section, elastic differential cross section,
        non-elastic cross section, polarization, Hauser-Feshbach theory, DWBA, 
        coupled channel theory , and indicate by "*" in proper order in 
        49 -55 columns.
   Deformed parameter : column 56-60.
   Standard abbreviation of reference : column 61-66.
   The line marked "Vr"in 7 - 10 columns contains the depth parameters of 
   real potential in MeV: Vr0(column 12-22),Vr1(column 23-33), Vr2(column 
   34-44), Vr3(column 45-55), Vr4(column 56-66),and the sign for requiring 
   annotation(column 67-74).
   The line marked "rr" in 7 -10 columns and "ar" in 75 -78 columns contain  
   the geometry parameters  of real potential in fm rr0(column 12-22), 
   rr1(column 23- 33), Cr(column 34-44), ar0(column 45-55), ar1(column 56-66), 
   and the sign  for requiring annotation (column 67-74).
   The rest may be deduced by analogy, the lines contain the data for Wd, rd, 
   ad ; Wg, rg, ag ; Wv, rv, av; Vso, rso, aso; Wso, r'so, a'so,  
   and notes for non-standard optical potential parameters.
Date:
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 Time of establishment: 15 August 1994
 Time of correction 25 March, 1995
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