| 摘要 |
<p>1,128,328. Nuclear particle discriminators. UNITED KINGDOM ATOMIC ENERGY AUTHORITY. Oct. 25, 1965 [Dec. 21, 1964], No. 51929/64. Heading G1A. [Also in Division G6] In a nuclear particle detector, descrimination is provided by the decay mode properties of the scintillation counter organic phosphor. Two signals are generated from each pulse produced by an incident particle. The intensity of the light emitted by the phosphor decays in both rapid and slow modes, the ratio between the two being characteristic of the incident particle. The initial and tail sections of the pulse are due to the fast and slow modes respectively. The radiation 1, is incident on scintillator 2 and the output from the photo-multiplier 3 is applied through the gates 6 and 6' to the capacitors 8 and 8'. The gate timing is such that the initial part of the pulse is applied to 8, the charge on which is due to the fast component of the phosphor decay mode, while the charge on 8' is due to the whole of the pulse. The ratio of the charges, measured by the difference network 13, indicates the return of the incident particles. In a modification, the condenser 8' may be charged by the pulse tail section.</p> |
