https://doi.org/10.1140/epja/s10050-021-00487-8
Special Article – New Tools and Techniques
New method for the production of thin and stable, segmented n
contacts in HPGe detectors
1
Laboratori Nazionali di Legnaro, Istituto Nazionale di Fisica Nucleare, Viale dell’Università 2, 35020, Legnaro, PD, Italy
2
Facultat de Fisica, Universitat de Valencia, C/ Doctor Moliner 50, 46100, Burjassot, Spain
3
Instituto de Física Corpuscular, C/Catedrático José Beltrán 2, 46980, Paterna, Spain
4
Dipartimento di Fisica e Astronomia “G. Galilei”, Università di Padova, Via Marzolo 8, 35121, Padua, PD, Italy
5
INFN, Sezione di Perugia & Dipartimento di Fisica e Geologia, Università di Perugia, Via A. Pascoli, 06123, Perugia, Italy
6
INFN Sezione di Ferrara, Via Saragat 1, 44124, Ferrara, Italy
Received:
30
November
2020
Accepted:
11
May
2021
Published online:
2
June
2021
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.
© The Author(s) 2021
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.
