摘要:
Scintillating fibers are provided comprising an outer layer, an inner layer, a fiber center and an interface between the inner and outer layers. The distance between the fiber center and any point of the interface in a fiber cross section defines a radius and the distance between the fiber center and any point located along the radius defines a fractional radius. The outer layer has an index of refraction lower than that of the inner layer. The inner layer contains a dopant non-uniformly distributed within the inner layer. Processes for the preparation of such scintillating fibers are also disclosed.
摘要:
Proton-transfer, low self-absorbing chromophores of the formula: ##STR1## wherein R.sub.2 and R.sub.3 are independently hydrogen, alkyl, aryl, cyano, nitro, halo or an ether group, R.sub.4 is O or N--H, and R.sub.5 is thienyl, naphthyl, furanyl, pyrrolyl, phenyl vinyl, diphenyl vinyl, phenyl ethynyl, hydroxy chromonyl phenyl, didecyloxy hydroxy chromonyl phenyl, phenyl or ##STR2## wherein R.sub.1 is vinyl, vinyl phenyl, vinyl benzyl, alkyl ethenyl, or alkyl phenyl ethenyl, provided that when R.sub.5 is phenyl and R.sub.2 and R.sub.3 are hydrogen, R.sub.4 is N--H.
摘要:
A method for increasing the dynamic range of non-linear devices, such as a SiPM. By rendering the incoming flux of photos non-uniform, a significant increase in the useful dynamic range can be achieved. The desired distortion of the incoming flux can be achieved in a variety of ways. These include simple non-focused lenses, prisms, interference films, mirrors, and attenuating films. Virtually any device which distorts the incoming flux will increase the dynamic range of the SiPM and combinations may be used to tailor the response to a desired application.
摘要:
Polymers containing covalently-bonded, low self-absorbing, scintillating chromophores, polymerizable chromophores of the formula: ##STR1## wherein R.sub.1 is vinyl, .alpha.-methyl vinyl, vinyl phenyl, or vinyl benzyl, and R.sub.2 and R.sub.3 are independently hydrogen, alkyl, aryl, cyano, nitro, halo, or ether, and a process for the preparation of polymers containing low self-absorbing, scintillating chromophores.