X-ray source for x-ray microfluorescence using a monolithic x-ray focusing lens combined with aperture optics

✍ Scribed by Xunliang Ding; Yejun He; Yiming Yan

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 535 KB
• Volume: 26
• Category: Article
• ISSN: 0049-8246
• DOI: 10.1002/(sici)1097-4539(199711/12)26:6<374::aid-xrs236>3.0.co;2-s

✦ Synopsis

A monolithic x-ray focusing lens can focus divergent x-rays from a conventional x-ray tube into 110 lm microbeam. A gain factor of more than 1200 compared with an aperture without the lens has been achieved. Using a monolithic x-ray focusing lens combined with aperture optics, a 50 lm microbeam with sufficient intensity has been obtained. The detection limit for Mn by means of the x-ray microbeam source is approximately 1 Â 10-12 g when a 1.5 W x-ray tube power and a 1000 s measurement time are employed.