External module function dpel1 - used by mcdisp

In order to calculate neutron intensities for RAMAN scattering the external single ion module has to provide the transition matrix elements of the electric dipole moment $p_{{\rm el} \alpha}$ in units of $\vert e\vert$pm. The

The format to be used is:

extern "C" int dpel1(int & tn,double & T,Vector & Hxc,Vector & Hext,double * g_J,Vector & MODPAR,
char ** sipffilename,ComplexVector & p1,float & maxE, ComplexMatrix & est)
The requirements are equivalent to the dP1 function, therefore all details are not repeated here.