  The ROSEBUD experiment for Direct Dark Matter detection settled in 1999 in
the Canfranc Underground Laboratory. The first phase of the experiment was
dedicated to the understanding and reduction of the radioactive background
following successive removals of the radioimpure materials. Sapphire (25g, 50g)
and germanium (67g) absorbers were used. Thresholds respectively lower than
1keV and 450 eV were achieved on these detectors. The second phase of the
experiment plans to use scintillating bolometers to discriminate between
recoiling nuclei and electrons. Prototypes using commercial CaWO4 (54g) and BGO
(46g) were designed for this purpose. While internal contamination was found
and identified in both targets, neutron calibrations revealed their high
discrimination power. A 6 keV threshold on the heat channel of the BGO
bolometer points out the interest of such a novel material, for Dark Matter
research on neutralinos having spin-dependent or spin-independent interactions.
