c
c###################################################################
c
      subroutine jrrec1(pt, pcf, kncf, pfit, kermsg)
c
c     this is a subroutine to calculate a reaction rate coefficient
c     in cm[3]/s as function of electron tempreature in ev for
c     radiative recombination.
c
c     pcf is the coefficient data array, where
c
c     pcf(1) =   the threshold energy for the transition
c
c     pcf(2)  =   coefficient a(nl)
c
c     pcf(3)  =   coefficient chi(nl)
c
c     pt = tempreature (ev)
c
c     kermsg = blank if no errors
c
c     pfit = reaction rate coefficient in cm[3]/s
c
c     written by j. j. smith , iaea atomic and molecular data unit
c
c------------------------------------------------------------------------
c
      double precision pt, pcf, pfit
      real n
      dimension pcf(3)
      character*(*) kermsg
      data ry/13.58/

      eth=pcf(1)
      a=pcf(2)
      chi=pcf(3)
      beta=eth/pt
c
      pfit = a * 1.0e-14 * sqrt(eth/ry) * (beta**1.5) / (beta + chi)
      return
c
      end