Nuclear and X-ray spectrometry and low-pass filter and filtering

Details Nuclear and X-ray spectrometry and low-pass filter and filtering Nuclear and X-ray spectrometry and low-pass filter and filtering

1985-06-20

1987-09-08

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Including ionization means

250370, 250374, 250395, 364527, 364572, G01T 117

Patent

active

046926267

ABSTRACT:
Pulse pile-up rejection in nuclear and X-ray spectrometry is reduced or eliminated by providing the low-pass filter with a storage element which is charged to the value substantially by the voltage step generated by a quantum of radiation before the filtering process commences and only then effecting the filtering process. The step values before and after the rise of the step can be detected and with storage of the previous value, the energy proportional output can then be detected as the difference. The method and apparatus eliminates the rise time of the storage element as a factor contributing to pulse pile-up.

REFERENCES:
patent: 3321628 (1967-05-01), Webb
patent: 3872287 (1975-03-01), Koeman
patent: 4476384 (1984-10-01), Westphal
M. Bertolaccini, C. Bussolati, S. Cova, I. DeLotto and E. Gatti, "Optimum Processing for Amplitude Distribution Evaluation of a Sequence of Randomly Spaced Pulses", Nuclear Instruments and Methods, vol. 61, (1968), pp. 84-88.
Nuclear Instruments and Methods 100, (1972), pp. 493-504, North-Holland Publishing Co., "Pulse-Shaping in Low-Noise Nuclear Amplifiers: A Physical Approach to Noise Analysis", F. S. Goulding.

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