5 TA3732 A 11 ID . ... ^ ^ i ecnmcai Activities 1 982 Center for Radiation Research U.S. DEPARTMENT OF COMMERCE National 8ureau of Standards National Measurement Laboratory Center for Radiation Research Washington, DC 20234 February 1983 DEPARTMENT OF COMMERCE )NAL BUREAU OF STANDARDS I I i i NATIONAL BUREAU OF STANDARDS LIBri'.P.Y Mar p | u HC5+ - £ NBSIR 83-2654 too ?3-a?bS TECHNICAL ACTIVITIES 1982 11x3 CENTER FOR RADIATION RESEARCH Chris E. Kuyatt, Director U.S. DEPARTMENT OF COMMERCE National Bureau of Standards National Measurement Laboratory Center for Radiation Research Washington, DC 20234 February 1 983 U.S. DEPARTMENT OF COMMERCE, Malcolm Baldrige, Secretary NATIONAL BUREAU OF STANDARDS, Ernest Ambler. Director I I I I I I I ABSTRACT This report summarizes research projects, measurement method develop- ment, testing and data evaluation activities, carried out during Fiscal Year 1982 in the NBS Center for Radiation Research. These activities fall in the areas of radiation measurements, atomic and plasma radiation, nuclear radiation, radiation physics, radiometric physics, and radiation sources and instrumen- tation. Key Words: Atomic radiation; nuclear radiation; plasma radiation; radiation instrumentation; radiation measurements; radiation physics; radiation sources; radiometric physics. i . INTRODUCTION This report is a summary of the technical activities of the NBS Center for Radiation Research (CRR) for the period October 1, 1981 to September 30, 1982. The Center is one of five Centers in the National Measurement Laboratory. The Center for Radiation Research develops and maintains the scien- tific competences and experimental facilities necessary to provide the nation with a central basis for uniform physical measurements, measurements methodology, and measurement services in the areas of optical radiation, ultraviolet radiation, and ionizing radiation (x rays, gamma rays, electrons, neutrons, and radioactivity); provides government, industry, and the private sector with essential calibrations for field radiation measurements needed in such applied areas as nuclear power, health care, radiation processing, advanced laser development, and radiation protection for public safety; carries out research in order to develop improved radiation standards, new radiation measurement technology, and improved understanding of atomic, molecular, and nuclear radiation processes; collects, compiles, critically evaluates and supplements the existing atomic, molecular, and nuclear data base in order to meet the major demands of the nation for such data; and participates in collaborative efforts with other NBS Centers in the inter- disciplinary applications of radiation. The summary of activities is organized in six parts, one for the Office of Radiation Measurement, and one for each of the five Divisions in the Center: Atomic and Plasma Radiation, Nuclear Radiation, Radiation Physics, Radiometric Physics, and Radiation Sources and Instrumentation. Each Division tells its own story in its own way. In general there is an introduction followed by a series of short reports on current activities, publications during the year, talks given, committee participation, and professional interactions A detailed table of contents has been provided to permit the reader to find those activities of greatest interest. To obtain more information about particular work, the reader should address the individual scientists or their division, c/o Center for Radiation Research, Radiation Physics Building, C229, National Bureau of Standards, Washington, D.C. 20234. Table of Contents ABSTRACT o , -j INTRODUCTION ii OFFICE OF RADIATION MEASUREMENT - 530 1 Invited Talks 7 Publications 8 Technical & Professional Committee Participation & Leadership ... 9 Major Consulting and Advisory Services 10 ATOMIC AND PLASMA RADIATION - Division 531 ........ 11 Atomic Spectroscopy Group ............. 12 Vacuum UV Spectra of Atomic Ions Atomic Inner-Shell Photoabsorption Laser Spectroscopy Atomic Energy Levels Data Center Atomic Radiation Data Group 14 Theoretical Studies Data Center Plasma Radiation Group 15 Colli si onal Rate Coefficient Studies with the 50 kj Theta Pinch Tokamak Spectroscopy Strongly Coupled Plasma Stark Effect on Autoionization Resonances Colli sional Redistribution of Radiation Stark Broadening, Shifts and Asymmetries of Hydrogenic Ion Lines Rayleigh Scattering Vacuum Ultraviolet Radiometry with Plasmas Quantitative Spectroscopy of D.C. Arcs Sponsored Conferences 20 Invited Tal ks 21 Publications 23 Technical & Professional Committee Participation & Leadership . 27 Major Consulting and Advisory Services 28 Journal Editorships 29 Trips Sponsored by Others 30 Calibration Services Performed 31 NUCLEAR RADIATION - Division 532 .... 32 Dosimetry Standards for Neutron Radiation Therapy Nuclear Theory Group 34 Elementary Particle Theory Nuclear Theory Photonuclear Theory Theoretical Neutron Dosimetry Neutron Personnel Monitoring Civil Defense Nuclear Research Group 38 Neutron Measurements and Research Group 39 Neutron Field Standards Group 42 Radioactivity Group 47 Standard Reference Materials and Calibration Services Basic Activity and Nuclear Data Measurements Other Agency Programs International Activities Sponsored Conferences 51 Invited Talks 52 Publications 54 Technical & Professional Committee Participation & Leadership ... 61 Major Consulting and Advisory Services 67 Journal Editorships 69 Trips Sponsored by Others 70 Standard Reference Materials 72 Calibration Services Performed. .................. 74 RADIATION PHYSICS - Division 533 ... 77 Radiation Theory Group 78 Radiological Physics Cross Sections Radiation Protection - Civil Defense Dosimetry Group 81 Calibration and Measurement Assurance Services Calorimetry High-Energy Measurement-Assurance Services Radiation Protection Dosimetry X-Ray Physics Group ........ 85 Medical Radiography Industrial Radiography Pulse Radiolysis Far Ultraviolet Physics Group 89 Angle Resolved Photoelectron Molecular Spectroscopy Photoel ectron- Photo ion Coinci dence Polarized Fluorescence Surface Science New High Energy Capability at SURF Electric Field Effects The Angular Asymmetry Parameter of Silver Dosimetry for Industry and Defense Solid State Studies He Microbubbles Laser Prepared States Symmetry of n=2 State in Helium Lithography Photoabsorption Studies of Laser-Ionized Species Improved Radiometric Accuracy Spectrometer Calibrations Transfer Standard Detectors Electron Physics Group 97 Surface Magnetism and Electron Diffraction High Energy Resolution Electron Scattering v Theory Electron Optics Electron-atom Collisions Sponsored Conferences 101 Invited Talks 102 Publications 110 Technical & Professional Committee Participation & Leadership ... 119 Major Consulting and Advisory Services 126 Journal Editorships 133 Calibration Services Performed 134 RADIOMETRIC PHYSICS - Division 534 135 Spectroradiometry and Optical Pyrometry 138 Instrumentation and Techniques Studies of the Basis of Accurate Radiometry Other Agency Projects Spectrophotometry 141 Diffuse Reflection Retroreflection Transmission Densitometry Luminescence Electro-Optical and Quantum Radiometry 144 Photometric-Radiometric Calibrations and Map 149 Sponsored Conferences 151 Invited Talks 152 Publications 153 Technical & Professional Committee Participation & Leadership ... 155 Major Consulting and Advisory Services 157 Trips Sponsored by Others 159 Standard Reference Materials 160 Calibration Services Performed 161 vi RADIATION SOURCE AND INSTRUMENTATION - Division 535. ......... 162 CW Microtron Project Planning for New Facility Consulting and Advisory Services Linac Operations . 164 SURF Operations ................... 168 SURF Operations Statistics SURF Users During FY 82 Instrumentation Services 172 Electronic Instrumentation Maintenance and Construction Control Instrumentation Design and Construction Instrumentation Support for Physics and Chemistry Projects Mechanical Instrumentation Services Radiation Instrumentation Standards . .... 174 Invited Talks 176 Publications 177 Technical & Professional Committee Participation & Leadership . 178 Major Consulting and Advisory Services 180 Standard Reference Materials 181 SPONSORED SEMINARS AND COLLOQUIA 182 I I 1 1 TECHNICAL ACTIVITIES 530, Office of Radiation Measurement Task No. 11201 (new task no. 15201) - Radiation Standards Dissemination The function of the Office of Radiation Measurement is to promote the dissemination to federal, state, and local radiation control programs, and to the medical, industrial, and defense communities, of the measurement standards and technology required for reliable measurement of ionizing radiation that may be hazardous. The Office assists the technical organi- zational components of CRR in monitoring the radiation measurement needs of these national user groups, and in activities undertaken to meet nation- al needs. The latter include methods for improving the consistency of field measurements with the national physical measurement standards. The office maintains liaison with organizations that conduct measurement- intensive programs in the areas of radiation safety, energy, health, and environmental contamination. Examples are the Nuclear Regulatory Commission, Department of Energy, Bureau of Radiological Health, Environmental Protection Agency, Occupational Safety and Health Administration, and the Conference of Radiation Control Program Directors. The Office participates in collabora- tive programs with most of these organizations to satisfy specific measure-