Possibility of the detection of classical novae with the shield of the INTEGRAL-spectrometer SPI

The shield of the INTEGRAL spectrometer provides a large detection area wit h a wide held-of-view. Calculations have been performed to check whether th e temporal analysis of the counting rats of the SPI anticoincidence allows the detection of explosions of novae. The background rate of the shield as well as its response to gamma-ray have been modelled with monte-carlo simul ations. Accounting for uncertainties in the rate of novae, their distributi on in the Galaxy and their light curves in hard X-ray domain, the number of nova explosions detectable with this method during the INTEGRAL mission, i s estimated. Such observationnal mode will allow to improve our knowledge o n nuclear runaway in novae. Since the maximum of magnitude in the visible h appens later than in gamma-ray, SPI will provide alert for optical observat ions.