A photosensitive element containing a silver halide emulsion chemically sensitized with a chalcogenic compound

A photosensitive element which comprises on a support at least one photosensitive silver halide emulsion layer and at least a non-light sensitive layer, wherein the silver halide emulsion layer comprises a chalcogenic compound satisfying formula (1): wherein: X is Se or Te, forming a double bond with its neighbouring C-atom, Nu is a nucleophilic group which brings an electron pair in heterolytic bond formation, L is a divalent linking group representing each group which can position an electron donating atom in any of the 5th to the 8th position vis-a-vis the carbon atom of the carbon-chalcogen double bond, AQB represents the necessary atoms to form a substituted or non-substituted heterocyclic 5- or 6-membered ring, provided that when A is a Nitrogen-atom, B is an atom selected from the group consisting of NR , O, S, Se and Te, R can represent a hydrogen, a substituted or non-substituted alkyl-, acyl-, aryl-, aralkyl- or heteroaryl-group; and a method wherein said chalcogenic compound is used during the step of chemically sensitizing at least one of the said silver halide emulsions at a pH-value situated between 3 and 10, a pAg-value situated between 6 and 11 and a temperature in the range of from 40 DEG C up to 95 DEG C.