The fission of by thermal neutrons can be represented as ^ 235 U +n ^ 144 Ba +^ 89 Kr…

PHYSICS · Single correct · A Level · Physics · Nuclear physics · Nuclear physics

Problem

The fission of

^{235}\text{U}

by thermal neutrons can be represented as

^{235}\text{U}+n \rightarrow ^{144}\text{Ba}+^{89}\text{Kr}+3n+Q.

Given the atomic masses:

^{235}\text{U}: 235.0439\,u

, neutron:

1.0087\,u

^{144}\text{Ba}: 143.9229\,u

^{89}\text{Kr}: 88.9176\,u

, and

1\,u = 931.5\,\text{MeV}/c^{2}

, calculate

Q

(energy released) for one fission event. (a)

\approx 189\,\text{MeV}

(b)

\approx 215\,\text{MeV}

(c)

\approx 173\,\text{MeV}

(d)

\approx 92\,\text{MeV}