The atoms have to absorb neutrons travelling at higher speeds.

Helium has a low tendency to absorb neutrons and become radioactive.

In such applications, absorbing neutrons is normally an undesirable effect.

Due to its amazing ability to absorb neutrons, it is also being studied for use in nuclear reactors.

Second, control rods absorb neutrons and adjust the power level or shut down the reactor in the course of normal operation.

The controls were rods covered with cadmium foil, which absorbed neutrons.

Because holmium strongly absorbs neutrons, it is also used in nuclear control rods.

Some of the atoms in the sample absorb neutrons and become radioactive.

When the control rods are lowered into the core, they absorb neutrons, which thus cannot take part in the chain reaction.

The preferred gas, helium, does not easily absorb neutrons or impurities.