A silver halide emulsion sheet for detecting track of charged elementary particles,
in which emulsion at least one silver halide emulsion layer and at least one hydrophilic
protective colloid layer are applied on both surfaces of a transparent support,
and a compound selected from benzotriazoles is contained in said at least one silver
halide emulsion layer.
A processing method for processing the above-described silver halide emulsion
sheet
with a developer comprising a developing agent represented by formula (A):
##STR1##
wherein R1 represents a hydrogen atom, an alkyl group, an aryl
group, or a heterocyclic group.
A developer for use in developing the above-described silver halide emulsion
sheet,
comprising a developing agent represented by the above-mentioned formula (A).
