This page is intended to provide a brief summary of current and recent research at the UMD Radiation Facilities (this is under construction and always will be).
• Trinity Test Site Neutron Flux Study
PI: T. Koeth & W. Kolb
Europium-152 is the most prominent activation product found today in fused soil produced by the first nuclear explosion. By reactivating this material and comparing with current activity, the original exposure can be estimated. From neutron measurements made at the time of the explosion, the initial location of soil samples will be determined and related to the location where they were actually found to derive a model for the way soil is dispersed when a nuclear fireball interacts with the ground.
• The Effects of Radiation-Induced Crystallographic Disorder on Exotic Phases of Matter
PI: J. Paglione
The Paglione group's research on quantum materials makes use of the irradiation facilities in order to study the effects of radiation-induced crystallographic disorder on the physical properties of various exotic phases of matter, including magnetism, superconductivity, topological phases of matter and other quantum phenomena. As an example, it is well known that different types of superconductors have different sensitivities to disorder that depend on the nature of the way electrons are paired to form the superconducting condensate. The use of electron- and gamma ray irradiation to induce a controlled and varying amount of disorder in single-crystal samples allows for detailed studies of this dependence to provide fundamental information about the superconducting Cooper pair wave function that can discriminate between conventional and unconventional superconductivity.
• Neutron Radiography & Imaging Optimization at MUTR
PI: M. Coplan & T. Koeth
At the Maryland University Training Reactor (MUTR) a neutron imaging facility for neutron radiography is under development. Presently, radiometric images of hydrogen containing materials up to 50 mm in diameter have been obtained with a resolution of better than 100 microns. This is sufficient for a wide variety of investigations including composite materials structures, minerals impregnated with hydrocarbons, and the resolution of hydrogen containing objects imbedded in metal matrices. Work is underway to improve the resolution, decrease the exposure time, and increase the effective object size.
• Radiation-induced aging of scintillators for HEP experiments
P.I.: A. Belloni, S. Eno
• Radiation-induced damage of plastic scintillators
P.I.: A. Belloni, S. Eno, T. Koeth