The present invention discloses an integrated gamma spectrum measurement
system suitable for
neutron activation analysis, which includes a
detector, a header multichannel pulse amplitude analyzer, aninterface and a shell. The
detector includes a
scintillator and a
photomultiplier; and
gamma ray enters the
detector and is finally converted into an electric pulse
signal. The header multichannel pulse amplitude analyzer is packaged by the
metal shell, which includes a
voltage divider circuit, an adjustable
high voltage power circuit and a multichannel spectrum acquisition circuit. The
voltage divider circuit and the adjustable
high voltage power circuit provide the bias
voltage for each
dynode of the
photomultiplier. The multichannel spectrum acquisition circuit realizes the conversion of the
ray pulse
signal to the spectrum. An interface circuit adopts a PoE interface, which can not only supply power for the
system but also realize the function of network port communication. The shell plays a role of carrying,
electromagnetic shielding and
radiation shielding; and all components and circuits are enclosed in the detector shell. The invention provides the gamma spectrum measurement
system with small volume, low cost, convenient application, a high counting
pass rate and
high energy resolution.