  Among the detectors used for rare event searches, such as neutrinoless Double
Beta Decay (0$\nu$DBD) and Dark Matter experiments, bolometers are very
promising because of their favorable properties (excellent energy resolution,
high detector efficiency, a wide choice of different materials used as
absorber, ...). However, up to now, the actual interesting possibility to
identify the interacting particle, and thus to greatly reduce the background,
can be fulfilled only with a double read-out (i.e. the simultaneous and
independent read out of heat and scintillation light or heat and ionization).
This double read-out could greatly complicate the assembly of a huge,
multi-detector array, such as CUORE and EURECA. The possibility to recognize
the interacting particle through the shape of the thermal pulse is then clearly
a very interesting opportunity.
  While detailed analyses of the signal time development in purely thermal
detectors have not produced so far interesting results, similar analyses on
macro-bolometers ($\sim$10-500 g) built with scintillating crystals showed that
it is possible to distinguish between an electron or $\gamma$-ray and an
$\alpha$ particle interaction (i.e. the main source of background for 0$\nu$DBD
experiments based on the bolometric technique). Results on pulse shape analysis
of a CaMoO$_4$ crystal operated as bolometer is reported as an example. An
explanation of this behavior, based on the energy partition in the heat and
scintillation channels, is also presented.
