A Simple Method for Subtracting Background from Elemental Maps of Scanning Proton Microprobe

At present, the conventional elemental mapping method for routine scanning protonmicroprobe analyses is the TCEW method. With this method, the elemental mapsare obtained by making use of the total counts entering a simple energy window onan X-ray peak. The fatal disadvantage of this method is that the total counts entering anenergy window contain the contribution of continuum background. Even when the elementof interest is abeent, the variation in the intensity of the background within the energy can