In reply to Eric Walker's message of Fri, 11 Jan 2013 00:14:43 -0800: Hi, [snip] >A textbook I have on radiation (Turner) says that for a charged particle of >z=1, electron capture becomes significant below an energy of ~25 keV. If >the D nucleus captures an electron as it travels, then perhaps it will pass >through as a neutral particle part or most of the time, losing less energy >in the process and allowing more interactions before it drops below 5 keV? > >Eric
Possible, but then what are it's chances of losing the electron again? IOW it may go through a whole cycle of capture and loss many times before it finally comes to a halt. Regards, Robin van Spaandonk http://rvanspaa.freehostia.com/project.html

