Em Eds News Today : Breaking News, Live Updates & Top Stories | Vimarsana

>> ha ha. yeah. wow, yours were clean. >> yeah. >> joe? >> you're going to me for the last block, aren't yo. >> no, the person who goes first the first time is last the last time. haven't you figured that out? >> this story hit home for weeks because i'm on the cusp and made me realize i should eat more pasta because some criminal nation is good if it gets it out of going on lame rides with your cousins. >> you really hate your does sniens i do. no, i'm just teasing. they're adorable. >> all right. coming up awoke petition to tweak a definition. m eds. and it's unlikely to improve without trea...

An introduction to elemental analysis with ChemiSEM Technology

Potassium (K)-rich feldspars are one of two mineral types typically used for optical dating. Feldspar grains can contain up to ~14 wt% K that gives rise to an internal dose rate component. This internal component can comprise a significant proportion of the total environmental dose rate to which a mineral grain is exposed. The environmental dose rate term—the denominator in the optical age equation—determines the rate at which electronic charge is transferred into the crystal lattice of a mineral grain over its period of burial. Not all feldspar grains have the same K concentration, so int...