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The realization of pulsed-laser diffused, thin n+ contacts on high purity germanium (HPGe) and their successful segmentation is described. The contacts have been obtained by a laser-induced diffusion of Sb atoms, deposited by sputtering on Ge surface, and then segmented by means of a photolithographic technique. Three small prototypes of gamma ray detectors have been implemented, using the same n+ contact (laser diffused Sb) but with three different geometries and a B implanted p+ contact. Electrical and detection properties of the prototypes have been characterized, showing low leakage currents and good spectroscopy data with different gamma-ray sources. The stability of the detector performance has also been tested subjecting one of the prototypes to a typical annealing treatment.
Springer Berlin Heidelberg
Publication date: 
1 Jun 2021

S Bertoldo, G Maggioni, W Raniero, C Carraro, S Riccetto, F Sgarbossa, D Scarpa, A Andrighetto, A Mazzolari, A Gadea, DR Napoli, E Napolitani, D De Salvador

Biblio References: 
Volume: 57 Issue: 6 Pages: 1-10
The European Physical Journal A