A theoretical study of the fluorescent intensity emitted by a small-thickness multicomponent specimen is carried out and a strong dependence on the inclination angle α of the propagation plane is found. The existence of one angular value αM at which the total fluorescent emission achieves a maximum is demonstrated, and it is found that such an angle depends essentially on the sample thickness and composition. Calculating αM by means of the theoretical model, it is possible to select the optimal excitation detection configuration to reach the maximum fluorescent intensity compatible with the characteristics of thickness and composition of the observed sample. Inversely, the thickness of a sample of known composition can be estimated by means of the experimental determination of the angle αM. However, it was found that this thickness measuring method has a very poor sensitivity. The theoretical results have been confirmed by Monte Carlo simulation. © 1989.
Fernandez J.E., Rubio M. (1989). Influence of the propagation-plane inclination angle on the fluorescent intensity: Study of the emission of small-thickness samples and determination of the maximum emission angle. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT, 280(2-3), 539-545 [10.1016/0168-9002(89)90968-6].
Influence of the propagation-plane inclination angle on the fluorescent intensity: Study of the emission of small-thickness samples and determination of the maximum emission angle
Fernandez J. E.
Primo
Membro del Collaboration Group
;
1989
Abstract
A theoretical study of the fluorescent intensity emitted by a small-thickness multicomponent specimen is carried out and a strong dependence on the inclination angle α of the propagation plane is found. The existence of one angular value αM at which the total fluorescent emission achieves a maximum is demonstrated, and it is found that such an angle depends essentially on the sample thickness and composition. Calculating αM by means of the theoretical model, it is possible to select the optimal excitation detection configuration to reach the maximum fluorescent intensity compatible with the characteristics of thickness and composition of the observed sample. Inversely, the thickness of a sample of known composition can be estimated by means of the experimental determination of the angle αM. However, it was found that this thickness measuring method has a very poor sensitivity. The theoretical results have been confirmed by Monte Carlo simulation. © 1989.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
