lob=exp(-0.220544*x*x);//gaussian equivalent of J1 formula normalise a 1
//BUG JEC 20/9/19 the magic coeff was determined on spherical_bessel fonction and not the Bessel function lob = exp(-0.220544*x*x); //gaussian equivalent of J1 formula normalise a 1
lob=exp(-0.280092*x*x);//gaussian equivalent of J1 formula normalise a 1