The mean life of nuclide P is

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

Problem

4\,\mu\text{s}

. Its decay constant is

60\%

greater than that of nuclide Q. What is the half-life of Q in microseconds? (Use

\ln 2 =0.693

) (a)

6.4\,\mu\text{s}

(b)

2.8\,\mu\text{s}

(c)

4.4\,\mu\text{s}

(d)

2.5\,\mu\text{s}