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MAC Auger Electron Microscopy Standards, Electron Microscopy Sciences

Supplier: EPREDIA
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80095-05 80095-35 80095-40 80095-MINA 80095-SC25 80095-15 80095-1872 80095-RE32 80095-MINB 80095-RE25 80095-UF32 80095-BIO25 80095-REG 80095-UF25 80095-25 80095-30 80095-50 80095-BIO32 80095-SC32 80095-U32 80095-20 80095-482 80095-483 80095-ELE 80095-10 80095-45 80095-481 80095-U25 80070-37 80070-37A 80070-55
100495-266EA 2574.22 USD InStock
100495-266 100495-280 100495-282 100495-300 100495-310 100495-270 100495-272 100495-306 100495-302 100495-304 100501-504 100495-294 100495-308 100501-502 100495-276 100495-278 100495-292 100495-296 100495-312 100495-316 100495-274 100495-288 100495-290 100495-298 100495-268 100495-284 100495-286 100495-314 102099-000 102099-002 102099-004
MAC Auger Electron Microscopy Standards, Electron Microscopy Sciences
Standards Color Reference and Spectroscopy Standards
MAC has developed multi-element blocks of reference materials suitable for the compilation of a reference library of Auger sensitivity factors when used with the Auger Electron Microscopy (AES). (Auger electron: one of the electrons ejected from an atom as a result of the internal conversion of its own X-ray in the auger effect. Auger effect: a process in which an atom singly ionized by emitting one electron with energy in the X-ray range instead of emitting the usual X-ray photon on recovery undergoes a transition in which a second electron is emitted).

A carefully selected range of elements or compounds will enable the surface analyst to compile a valuable reference library of spectra for those materials of specific interest to his field of study. AES is of particular value in the investigation of the surface chemistry of electronic materials. A set of 33 relevant reference materials is designed for this purpose. A Faraday Cup, for the accurate measurement of specimen current, is available as an option on all reference blocks.

Multi-element blocks containing up to 50 reference materials can be made to suit the configuration of the most instrument but, the actual number of materials and the shape and size of the reference block is determined by the physical limitations imposed by the specimen holder and chamber. The reference material each has an exposed area about 2 square mm.

Each block of reference material is made from AISI 304 grade austenitic stainless steel, set with elements and compounds of your choice and polished to a 1/4 micron diamond finish. All blocks are supplied with certificates of analysis and a map showing the locations of the reference materials.The design of the reference blocks for AES is based upon that used for the production of our already established range of electron probes X-ray microanalysis (EPMA) standard blocks.

For surface analysis in ultra-high vacuum (UHV) environments, the design of the AES blocks has three significant differences over the EPMA blocks: For EPMA, the reference standards are set into drilled brass blocks. However, for UHV, the brass would outgas, so non-magnetic stainless steel is used for the AES reference blocks. There is no coating of electrically conductive carbon on the AES blocks. For EPMA, this coating is needed to neutralize any electron beam induced charge. EPMA standards are mounted using epoxy resin, which would rapidly outgas under UHV conditions. The AES reference blocks are set with Wood’s Fusible Metal. This is an alloy of bismuth, lead, tin, and cadmium.


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