Abstract
A measurement of the production of ultracold neutrons from velocity-selected cold neutrons on gaseous and solid deuterium targets is reported. The expected energy dependence for two-particle collisions with well defined neutron and Maxwell-Boltzmann distributed molecular velocities is found for the gas target. The solid target data agree in shape with the phonon density-of-states curve and provide strong evidence for the phonon model including multiphonon excitations.
| Original language | English |
|---|---|
| Article number | 262502 |
| Journal | Physical Review Letters |
| Volume | 99 |
| Issue number | 26 |
| DOIs | |
| State | Published - Dec 27 2007 |
| Externally published | Yes |