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We have fabricated radiation detectors using p-type indium antimonide crystals grown by liquid phase epitaxy (LPE). The current–voltage curves, energy spectra of alpha particles, and energy resolutions obtained using two different InSb detectors were compared. The alpha-particle energy resolutions were 1.8% at 24 and 42K, using the LPE–InSb detector with wafer size of 1.0×1.5mm2.
The energy resolution of a superconducting tunnel junction particle detector was significantly improved by the addition of a metal mesh infrared-blocking filter. The energy resolution was 138–215eV full width at half maximum for 1.5–3.0keV Ar ions. The infrared-blocking filter reduces the loss of energy resolution due to infrared radiation at room temperature.
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