van de Graaff Accelerators


The NDRL features two van de Graaff electrostatic pulse generators. The 2 MeV accelerator is currently interfaced with a time-resolved resonance Raman detector featuring newly designed sample jets to enable the use of small volumes. Recently added deep UV excitation capabilities have allowed measurements on key short-lived inorganic transients which were previously inaccessible, such as superoxide and the formate radical in aqueous environments.


A 2.8 MeV device currently drives the time-resolved EPR experiment in addition to providing a high dose electron radiolysis beam. The pulsed-EPR capability has been recently employed to probe g-factor and hyperfine coupling shifts in the hydrogen atom in aqueous solutions up to supercritical temperatures.