Development of an optical lens based alpha-particle imaging system using position sensitive photomultiplier tube
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- 作者：Koki Ando ; Miki Oka ; Seiichi Yamamoto
- 关键词：Alpha-particle ; Optical lens ; PSPMT ; Imaging
- 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
- 出版年：2017
- 出版时间：1 February 2017
- 年：2017
- 卷：844
- 期：Complete
- 页码：72-76
- 全文大小：582 K
- 卷排序：844
文摘
We developed an optical lens based alpha-particle imaging system using position sensitive photomultiplier tube (PSPMT). The alpha-particle imaging system consists of an optical lens, an extension tube and a 1 in. square high quantum efficiency (HQE) type PSPMT. After a ZnS(Ag) is attached to subject, the scintillation image of ZnS(Ag) is focused on the photocathode of the PSPMT by the use of the optical lens. With this configuration we could image the alpha particle distribution with energy information without contacting to the subject. The spatial resolution and energy resolution were ~0.8 mm FWHM and 50% FWHM at 5 mm from the optical lens, respectively. We could successfully image the alpha particle distribution in uranium ore. The developed alpha-particle imaging system will be a new tool for imaging alpha emitters with energy information without contacting the subject.