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Dr Ronaldo Minniti joined the ionizing radiation division in December 1999. He has experience performing radiaion dosimetry measurements with high accuracy (at the ~0.2 % level) for a broad range of applications that make use of x-rays and gamma-rays (radiation beam irradiators, computed tomography, body scanners, x-ray inspections systems, etc...). Within the Dosimetry Group at NIST he is the lead scientist for maintaining and dissemination the national standard for air kerma from cesium-137 and cobalt-60 gamma ray beams. He also disseminates the absorbed dose to water standard for cobalt-60 therapy level beams.
At the international level he performs measurement comparisons with National Metrology Institutes (NMIs) around the world to ensure harmonization of international standards. Within the US, he disseminates the air kerma standard and performs radiation measurements for calibration facilities and secondary standard laboratories across the country. These include users in the field of radiation protection, medical field, homeland security, US Navy, Army and Air force, DOE laboratories, instrument manufacturers, industry and academia. He performs proficiency tests (blind tests) and measurements for laboratories that are seeking accreditation through agencies such as the American Association of Physics in Medicine (AAPM), Health Physics Society (HPS), National Voluntary Laboratory Accreditation Program (NVLAP), Department of Energy Laboratory Accreditation Program (DOELAP), and others.
Accomplishments include: The design and construction of 2 new cesium-137 gamma-ray beam irradiation facilities at NIST. The design and construction of 3 ionization chambers used for primary standard dosimetric measurements in gamma-ray and high energy x-ray beams. The re-establishment of the NIST cobalt-60 primary standard for air kerma. The design and construction of a safety system for the use of gamma-ray beam irradiators. Development of data acquisition systems for dosimetry measurements. Radiation measurements in support of a police investigation conducted by the National Bureau of Tobacco and Firearms (ATF) for which he shared an award for this work with four other NIST staff members. He performed radiation measurements in support of the test of various radiation detector instruments in support of the development of document standards published by the American National Standards Institute (ANSI) and for the department of Homeland Security. This work has been cited in the Science Daily News in April 27, 2005. http://www.sciencedaily.com/releases/2005/04/050421210615.htm
Before joining the Radiation Physics Division (formally the Ionization Radiation Division) at NIST he was awarded a National Research Council (NRC) Post Doctoral fellowship in the Atomic Physics Division were he helped expand the Electron Beam Ion Trap (EBIT) program to include the study of materials bombarded by highly charged ions using Scanning Tunneling Microscopy (STM). Dr. Minniti earned a Ph.D. in Physics at The University of Tennessee. He performed his doctoral thesis work at the Oak Ridge National Laboratory 7.0 MV EN-Tandem Van de Graaff Accelerator Facility where he investigated the emission of electrons from the interaction of ions with solid surfaces. He was a certified operator of the ORNL Van de Graaff Accelerator. He has experience teaching at the high school and undergraduate level. He is currently a member of the: HPS, American Physics Society, Mid Atlantic Chapter of the AAPM and the laboratory accreditation committees of the HPS. He collaborates with scientists at other agencies and institutions and has publications in peer reviewed journals. He serves as a reviewer for scientific journals.
Radiation Physics Division
NIST, 1997 - present
Ph.D., Physics, University of Tennessee, 1997