A PLA is a multi-employer, multi-union, pre-hire collective bargaining agreement that PLA proponents market to public and private construction owners as a tool to systemize labor relations between multiple construction trade unions and contractors on a specific construction site.
The alpha particle given off during the radioactive decay of americium-241 is absorbed by beryllium-9, producing carbon-12 and a neutron. Such devices can be used for the nondestructive testing of machinery and equipment and for other industrial applications.
The products of radioactive decay are called daughter products. > Uranium-238 undergoes Î±-decay. _92^238U â _90^234Th +color(white)(l) _2^4He The thorium-234 in turn undergoes Î²-decay. _90^234Th â _91^234Pa +color(white)(l) _(-1)^0e The nuclei that result from radioactive decay may themselves be radioactive. Protactinium is also radioactive and continues a long radioactive decay chain that ends with the stable nuclide lead-206. (from metadata.berkeley.edu) Thus, the decay of uranium-238 forms a whole host of radioactive nuclei. The decay products of radioactive nuclei are called daughter products.