Radiotherapy, or radiation therapy, is the clinical use of high energy rays (ionizing radiation) to induce DNA damage in all exposed cells to ultimately kill cancer cells or prevent cancer growth.

Nanocrystalline (NC) semiconductor materials have previously been studied as a means of increasing the exciton multiplicity upon the impingement of visible light, for applications such as solar cells.

We report spectroscopic measurements of the THz radiation generated by the free electron laser (FEL) FLARE using electron spin resonance at high magnetic fields, which show that the 150 micropulses ...