Se presentan resultados experimentales de la C.C.E. (Charge Collection Efficiency) de partículas minimamente ionizantes, en dos detectores de Silicio irradiados con 2.78x1014 n/cm2 y 8.23 x1014 n/cm2, operados a temperaturas criogénicas (90K< T < 200K). Se muestra que la operación crio-génica produce una notable recuperación de la C.C.E. comparada con las mediciones a temperatu-ra ambiente, para la cual la C.C.E. es prácticamente nula. Se presentan, también, resultados expe-rimentales de la característica corriente-voltaje del detector y se muestra como el daño en el detec-tor ha originado un incremento de la corriente de fuga y como disminuye esta al operar a tempera-turas criogénicas, favoreciendo de esta manera la C.C.E.

Palabras claves: Charge Collection Efficiency.

Experimental results of the C.C.E. (Charge Collection Efficiency) of minimum ionizing particles in two silicon detectors, irradiated with affluences of 2.78x1014 n/cm2 and 8.23 x1014 n/cm2 and operated at cryogenic temperatures (90K< T < 200K), are shown. The cryogenic operation pro-duces a remarkable recovery of the C.C.E. in comparison to the measurements made at room tem-perature. In this case, the C.C.E. is practically zero. Experimental results of the current-voltage characteristics of the detector are also presented. Additionally, it is shown that the damage of the detector has caused an increase in the leakage current, and that such decreases when operating at cryogenic temperatures, thus favoring the C.C.E.

Keywords: Charge Collection Efficiency.