Community Research and Development Information Service - CORDIS


As modern isotope ratio mass spectrometers cover dynamic measurement ranges of more than six orders of magnitude, the linearity of the system (detector + pre-amplifier + amplifier) is not evident. The manufacturers offer electrical linearity tests but these apply only to parts of the measurement system. A complete picture of the instrument's linearity can be obtained when synthetic isotope mixtures covering the dynamic range of the instrument are used. In the present investigation the linearity of a Finnigan MAT 262 Q is tested using triple isotope mixtures of 233U, 235U and 238U(a). The measurement procedure is derived and information about the linearity of the ion counter in combination with a decelerating system is obtained.

Additional information

Authors: MAYER K, JRC Geel (BE);DE BIEVRE P, JRC Geel (BE);FIEDLER R, International Atomic Energy Agency, Safeguards Analytical Laboratory, Wien (AT)
Bibliographic Reference: Paper presented: Alfred O. Nier Symposium, Los Alamos (US), May 7-10, 1991
Availability: Available from (1) as Paper EN 36015 ORA
Record Number: 199110777 / Last updated on: 1994-12-02
Original language: en
Available languages: en