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Science 5 September 1975:
Vol. 189. no. 4205, pp. 795 - 797
DOI: 10.1126/science.189.4205.795
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Articles

Scanning Proton-Induced X-ray Microspectrometry in an Atmospheric Environment

P. Horowitz 1 and L. Grodzins 2

1 Department of Physics, Harvard University, Cambridge, Massachusetts 02138
2 Department of Physics, Massachusetts Institute of Technology, Cambridge 02139

Collimated million-electron-volt proton beams, brought out into air, can be used as a scanning microprobe to examine specimens with a spatial resolution of the order of 1 micrometer. Trace elements at concentrations as low as 1 part per million can be detected. Some preliminary results based on the use of this simple method are presented.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Proton-induced x-ray emission analysis of single human hair roots.
E. Henley, M. Kassouny, and J. Nelson (1977)
Science 197, 277-278
   Abstract »    PDF »
Elemental analysis of biological specimens in air with a proton microprobe.
P Horowitz, M Aronson, L Grodzins, W Ladd, J Ryan, G Merriam, and C Lechene (1976)
Science 194, 1162-1165
   Abstract »    PDF »


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Science. ISSN 0036-8075 (print), 1095-9203 (online)