Portable nuclear detector

A nuclear material detector, comprising:

• a scintillating fiber radiation sensor, said scintillating fiber radiation sensor emitting light when bombarded by gamma particles;
• a light detector optically coupled to said scintillating fiber radiation sensor,
• wherein said light detector detects light emitted by said scintillating fiber radiation sensor and outputs corresponding electrical signals;
• a conditioning circuit in operable communication with said light detector, wherein said conditioning circuit conditions the electrical signals output by said light detector for further processing;
• a frequency shift keying (FSK) circuit in operable communication with said conditioning circuit, wherein said FSK circuit converts the conditioned electrical signals output by said conditioning circuit into corresponding sinusoidal signals;
• a fast Fourier transform (FFT) circuit in operable communication with said FSK circuit, wherein said FFT circuit converts the sinusoidal signals into corresponding spectral lines;
• an electronic controller in operable communication with said FFT circuit, wherein said electronic controller is programmed with a table mapping frequencies of the spectral lines to corresponding radioactive isotopes;
• and
• an amplitude spectral addition circuit in operable communication with said electronic controller,
• wherein said amplitude spectral addition circuit sums the spectral lines output by said FFT circuit having equivalent frequencies, thereby producing a cumulative spectral line for each radioactive isotope detected.