wdsax.f

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C
C
  FUNCTION wdsax(X)
C           ********THREE PARAMETER WOOD SAXON
        common/wood/r,d,fnorm,w
  SAVE  /wood/
        wdsax=fnorm*(1.+w*(x/r)**2)/(1+exp((x-r)/d))
        IF (w.LT.0.) THEN
          IF (x.GE.r/sqrt(abs(w))) wdsax=0.
        ENDIF
        RETURN
        END