  A 891 g BGO scintillating bolometer has been tested at 10 mK in the
underground Laboratori Nazionali del Gran Sasso (Italy). The discrimination
capability, the radio-purity of the compound and the main features of the
crystal have been studied in order to demonstrate the excellent performances
obtained by operating a scintillating bolometer in the field of gamma and alpha
spectroscopy. The sensitivity of this detector in the study of extremely low
surface contaminations has been investigated.
