nuclear recoil การใช้

• This ratio is expected to be greater for electronic recoils than for nuclear recoils.
• Both groups reporting at the California conference looked for evidence of nuclear recoils by using underground detectors.
• Therefore the second phase of CRESST and EDELWEISS used new detectors capable of distinguishing electron recoil events from nuclear recoils.
• The vast majority of background particle interactions are electron recoils, while WIMPs ( and neutrons ) are expected to produce nuclear recoils.
• In this way backgrounds from electronic recoils can be suppressed by more than 99 %, while simultaneously retaining 50 % of the nuclear recoil events.
• The Stanford detector, which consists of silicon and germanium disks, monitors the background of neutron-induced nuclear recoils so they can be subtracted from the total signal.
• The experiment detects scintillation and ionization produced when particles interact in the liquid xenon volume, to search for an excess of nuclear recoil events over known backgrounds.
• Charged particles moving through the detector are expected to either interact with the electrons of the xenon atoms producing electronic recoils, or with the nucleus, producing nuclear recoils.
• The ratio of ionization signal to phonon signal differs for particle interactions with atomic electrons ( " electron recoils " ) and atomic nuclei ( " nuclear recoils " ).
• For a given amount of energy deposited by a particle interaction in the detector, the ratio of S2 / S1 can be used as a discrimination parameter to distinguish electronic and nuclear recoil events.
• The DRIFT collaboration ultimately aims to develop and operate an underground array of DRIFT detectors for observing and reconstructing WIMP-induced nuclear recoil tracks with enough precision to provide a signature of the dark matter halo.