Identification of physics signal-events near threshold in p-type point-contact Germanium detectors

Germanium detectors provides state-of-the art technology for rare event searches. There is vast use of these detectors in the search for physics beyond the Standard Model as well as the Standard Model itself. There is a wide range of geometrical configurations for these detectors and are available in two types: n and p-types. The rise-time (log10[τ]) 1D-distribution of events near detection threshold (7-9)σ [210- 270 eV for pPCGe & 360-460 eV for nPCGe] in different detectors along with pulser is shown in the article. It is explicit that the pulser resembles closely like B-events. Even, their FWHM of distribution are quite similar. Furthermore, we have fitted the three Pulser, B, Near point-contact events with hyperbolic tangent function and their χ² - distribution is shown in the article. It shows that the pulser is good to mimic physics pulses. Although pulser is very close to the physics pulses, not identical. The hyperbolic tangent function is good enough to give accurate rise-time. Therefore an optimized pulser can be used as a good tool for the correction of B-S leakage and identification of B signal-events in sub-keV region