anti-coˈincidencen.

Etymology: < anti- prefix¹ 2b + coincidence n. 7.

Physics.

Applied attrib. to a device, or to a system employing a device, which rejects or discriminates against measurements of events which occur simultaneously or are separated by a predetermined time, used esp. in experiments with cosmic rays and in nuclear physics. Also, the indication of the occurrence of an ionizing particle in such a device.

ΘΚΠ

the world > matter > physics > atomic nucleus > radioactivity > ionizing radiation > [noun] > cosmic rays > indication of occurrence

coincidence1930

anti-coincidence1939

1939 G. Herzog in Physical Rev. 55 1266/1 To investigate the nature of cosmic-ray particles a special anti-coincidence amplifying set was used to trip the cloud chamber only by those cosmic-ray particles whose further path lies below a given range.

1940 G. Herzog in Physical Rev. 57 67/2 Anticoincidences can be used to suppress the recording of the discharges in a coincidence circuit when one additional G-M counter is fired simultaneously.

1948 L. Jánossy Cosmic Rays iv. 40 If the background of coincidences, caused by the ionizing rays, could be eliminated, the arrangement would be vastly more sensitive for the detection of any non-ionizing rays. The solution of this problem was achieved by the important technique of anti-coincidences.

1948 L. Jánossy Cosmic Rays iv. 40 By a suitable electrical arrangement the coincidence counters are made insensitive whenever the anti-coincidence counters register a particle.

1953 A. D. Booth & K. H. V. Booth Automatic Digital Calculators vi. 42 The circuitry involves only standard coincidence and anti-coincidence units.

This entry has not yet been fully updated (first published 1972; most recently modified version published online November 2010).

单词	anti-coincidence
释义	anti-coˈincidencen. Etymology: < anti- prefix¹ 2b + coincidence n. 7. Physics. Applied attrib. to a device, or to a system employing a device, which rejects or discriminates against measurements of events which occur simultaneously or are separated by a predetermined time, used esp. in experiments with cosmic rays and in nuclear physics. Also, the indication of the occurrence of an ionizing particle in such a device. ΘΚΠ the world > matter > physics > atomic nucleus > radioactivity > ionizing radiation > [noun] > cosmic rays > indication of occurrence coincidence1930 anti-coincidence1939 1939 G. Herzog in Physical Rev. 55 1266/1 To investigate the nature of cosmic-ray particles a special anti-coincidence amplifying set was used to trip the cloud chamber only by those cosmic-ray particles whose further path lies below a given range. 1940 G. Herzog in Physical Rev. 57 67/2 Anticoincidences can be used to suppress the recording of the discharges in a coincidence circuit when one additional G-M counter is fired simultaneously. 1948 L. Jánossy Cosmic Rays iv. 40 If the background of coincidences, caused by the ionizing rays, could be eliminated, the arrangement would be vastly more sensitive for the detection of any non-ionizing rays. The solution of this problem was achieved by the important technique of anti-coincidences. 1948 L. Jánossy Cosmic Rays iv. 40 By a suitable electrical arrangement the coincidence counters are made insensitive whenever the anti-coincidence counters register a particle. 1953 A. D. Booth & K. H. V. Booth Automatic Digital Calculators vi. 42 The circuitry involves only standard coincidence and anti-coincidence units. This entry has not yet been fully updated (first published 1972; most recently modified version published online November 2010). < n.1939
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