Orientation Teeth in Nonmechanical Femtosecond Laser Corneal Trephination for Penetrating Keratoplasty
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- 作者：Leonardo Mastropasqua ; Mario Nubile ; Manuela Lanzini ; Roberta Calienno ; Oriana Trubiani
- 关键词：Gamma radiation detectors ; Scintillators ; Scintillator detectors ; Ray-trace modeling ; BGO energy resolution ; Diffuse reflectors
- 刊名：American Journal of Ophthalmology
- 出版年：2008
- 出版时间：July 2008
- 年：2008
- 卷：146
- 期：1
- 页码：46-49.e1
- 全文大小：878 K
文摘
Scintillator-based gamma-ray detectors are being actively pursued for homeland security applications. A key property of such detectors is their energy resolution which enables faster detection and more precise identification of gamma-ray sources. In order to obtain the best energy resolution with a given scintillator material, it is crucial to collect the largest fraction possible of the light emitted after gamma-ray absorption. Different techniques to maximize the light collection efficiency were investigated and tested experimentally. In particular, the effect of the scintillator geometry has been simulated with Detect2000. Also, a number of wrapping materials have been tested for their reflectivity and their performance in terms of improving the energy resolution in a BGO-based gamma-ray detector. The best results were obtained with a tapered cylinder geometry and the GORE DRP tape.