摘要 : A search for exotic dark matter (DM) in the sub-GeV mass range has been conducted using 205 kg day data taken from a p-type point contact germanium detector of the CDEX-10 experiment at China's Jinping underground laboratory. New ... 展开 A search for exotic dark matter (DM) in the sub-GeV mass range has been conducted using 205 kg day data taken from a p-type point contact germanium detector of the CDEX-10 experiment at China's Jinping underground laboratory. New low-mass dark matter searching channels, neutral current fermionic DM absorption (x + A → v + A) and DM-nucleus 3 → 2 scattering (x + x + A → Φ + A), have been analyzed with an energy threshold of 160 eVee. No significant signal was found; thus new limits on the DM-nucleon interaction cross section are set for both models at the sub-GeV DM mass region. A cross section limit for the fermionic DM absorption is set to be 2.5 × 10~(-46) cm~2 (90% C.L.) at DM mass of 10 MeV/c~2. For the DM-nucleus 3 → 2 scattering scenario, limits are extended to DM mass of 5 and 14 MeV/c~2 for the massless dark photon and bound DM final state, respectively. 收起