Nuclear fission produces it at a fission yield of 6.3 % ( thermal neutron fission of 235 U ), on a par with the other most abundant fission products.
12.
In the aftermath of criticality accidents the level of 140 La is often used to determine the fission yield ( in terms of the number of nuclei which underwent fission ).
13.
The fission products include every element from zinc through to the lanthanides; much of the fission yield is concentrated in two peaks, one in the second transition row ( Ce, Nd ).
14.
They are useful in weapon safety work _ to determine, for example, that accidental ignition of the conventional explosives at only one point on the sphere produces just a small fission yield.
15.
A higher compression but smaller highly enriched uranium, around 8 kilotons per kilogram of uranium, about the practical maximum 50 % fission yield efficiency for very large or very highly boosted fission weapons.
16.
So that's over half of the total energy from the total U-235 decay chain by itself, without even including the fission yield .-- talk ) 21 : 09, 4 February 2012 ( UTC)
17.
155 Eu ( half-life 4.7612 years ) has a fission yield of 330 parts per million ( ppm ) for uranium-235 and thermal neutrons; most of it is transmuted to non-radioactive and nonabsorptive gadolinium-156 by the end of fuel burnup.
18.
152 Eu ( half-life 13.516 years ) and 154 Eu ( half-life 8.593 years ) cannot be beta decay products because 152 Sm and 154 Sm are non-radioactive, but 154 Eu is the only long-lived " shielded " nuclide, other than 134 Cs, to have a fission yield of more than 2.5 parts per million fissions.
