21. A thermal neutron is one which is moving about the same speed as the atoms around it. 22. Gadolinium-157 has the highest thermal neutron barns. 23. Several neutron scattering techniques have been developed to use thermal neutrons to characterize magnetic micro and nanostructures. 24. Upon irradiation, a thermal neutron interacts with the target nucleus via a non-elastic collision, causing neutron capture. 25. The second most used fissile isotope plutonium-239 can also fission or not fission on absorbing a thermal neutron . 26. The hexaboride has a low coefficient of thermal expansion and a high nuclear cross section for thermal neutrons . 27. "This system uses a very simple technology, called thermal neutron analysis, " said Shea, the chief operating officer. 28. The photodisintegration of beryllium by gamma rays emitted by antimony-124 is used as a source for thermal neutrons . 29. It will operate with thermal neutrons . 30. This detector shows good efficiency at detecting fast neutrons in a background of thermal neutrons and gamma radiation.
