Hi, Does anyone know what the energy level is of the x-rays produced by 32P when the Bremstrahlung effect occurs? Do you know of a reference? Mark Dater NeXstar Pharmaceuticals, Inc. 2860 Wilderness Place Boulder, CO. 80301 Work phone: (303) 546-7703 Fax: (303) 444-0672 E-mail mdater@Nexstar.com These are my comments and questions and not those of my employer.