[link to www.3rd1000.com]

Pu-238, (half-life 87 years)
Pu-239, fissile (half-life 24,200 yrs)
Pu-240, fertile (half-life 6,500 yrs)
Pu-241, fissile (half-life 14 years)
Pu-242, (half-life 37 600 yrs)


Half-life is the time it takes for a radionuclide to lose half of its own radioactivity. The fissile isotopes can be used as fuel in a nuclear reactor, others are capable of absorbing neutrons and becoming fissile.


This indicates indeed Pu-238 CAN absorb a neutron to become fissile.