Typically positrons will thermalize, slow down, very quickly in a material.

He traveled at a speed that would thermalize him within a heartbeat, should his forcefield fail or his gyros tumble.

Very high densities are required to thermalize the rotational transitions of OH, so it is difficult to detect far-infrared emission lines from a quiescent molecular cloud.

As more and more WIMPs thermalize inside the Sun, they begin to annihilate with each other, forming a variety of particles including high-energy neutrinos.

Most fission reactors use a neutron moderator to slow down, or thermalize the neutrons that are emitted by nuclear fission so that they are more easily captured, causing further fission.

By using MCNP to simulate the cave and surrounding room, it was determined that 2.5 cm of polyethylene lining would be added to the inside and outside of the cave to help thermalize the neutrons.

The original proposal of inflation is, the exponentially growing phase ends via the nucleation of Coleman-de Luccia bubbles with a low vacuum energy, these bubbles collide and thermalize, leaving a homogeneous universe with high temperature.

Effectively, photons with lower energies than the bandgap do not get absorbed (depends on whether the semiconductor is direct or indirect, and the exact absorption coefficients), while higher energy photons are relatively inefficient as an energetic e-h pair can quickly (within about 10 s) thermalize to the band edges, thus reducing the energy of the extracted carriers.