A multi-purpose handheld radionuclide detection instrument has been developed

with an ARM7-based multi-channel analyzer

and optional detectors of CdTe or NaI(Tl) scintillator.Having a data base of common natural and artificial radioactive nuclides

it can realize in-situ field measurements and radionuclide detection.Testing results show that energy resolutions of CdTe detectors achieves 800 eV@59.54 keV(241Am) and 5.9 keV@0.662 keV(137Cs)

which are good enough for detecting nuclides of medium-low-energy γ-rays

while the NaI(Tl) detector can be used to detect nuclides of high-energy γ-rays.