RadChem 2018

Session

NAM 3

NAM.3

16 May 2018, 10:30

Casino Conference Centre

Conveners

NAM 3

• Rick Paul (NIST)
• Elisabete De Nadai Fernandes (Nuclear Energy Center for Agriculture, University of São Paulo)

700. Analysis of environmental radionuclides at ultra-low levels: Limitations for underground experiments on rare nuclear processes

Prof. Pavel P. Povinec (Faculty of Mathematics, Physics and Informatics, Comenius University in Bratislava, Slovakia)

16/05/2018, 10:30

Nuclear Analytical Methods

Invited

Accelerator mass spectrometry, inductively coupled plasma mass spectrometry, neutron activation analysis and underground gamma-ray spectrometry have been investigated for ultra-sensitive analysis of long-lived radionuclides (${}^{238}U$ and ${}^{232}Th$) in isotope sources and in construction materials designed for underground studies of rare nuclear processes and decays. Specific features of each...

502. Determination of ultra-trace levels of uranium and thorium in electrolytic copper by radiochemical neutron activation analysis

Prof. Ljudmila Benedik (Jožef Stefan Institute, Ljubljana, Slovenia)

16/05/2018, 11:00

Nuclear Analytical Methods

Verbal

Significant improvements in construction of Ge detectors for ultra-sensitive gamma-ray spectrometry systems located underground have been made in recent years. A special attention in the construction of the spectrometer was paid on requirement to achieve as low as possible background rates at the lines of progenies in the decay chains of U-238 and Th-232. Radiopurity of construction materials...

616. INAA of elemental admixtures in carbon-based nanomaterials for battery electrodes

Dr Jan Kameník (Nuclear Physics Institute of the Czech Academy of Sciences)

16/05/2018, 11:15

Nuclear Analytical Methods

Verbal

Carbon-based nanomaterials (nanocarbons) exhibit exceptional mechanical, electrical, thermal, and optical properties. These materials are attractive in various fields of science and technology, including energy storage. Despite the interest in nanocarbons as electrodes for supercapacitors and batteries, additional elements present at variable quantities could influence their electrochemical...

504. Sequential anion-exchange separation of ultra-trace actinides and lanthanides with an automatic system

Yutaka Miyamoto (Japan Atomic Energy Agency (JAEA))

16/05/2018, 11:30

Nuclear Analytical Methods

Verbal

Plutonium and americium belong to anthropogenic elements, and these ultra-trace elements are detected from environmental samples. Origin of these elements comes from the nuclear bomb tests and the accidental release from nuclear power plants. Isotope ratio and elemental abundance of these actinides provide information on the source term and the elapsed time [1][2]. Uranium and thorium in...

676. Application of HPLC-NAA for the speciation analysis of As, Fe and Se in infant formulas.

Dr Ewelina Chajduk (Institute of Nuclear Chemistry and Technology)

16/05/2018, 11:45

Nuclear Analytical Methods

Verbal

Elemental speciation of As, Se and Fe in infant formulas is of prime importance in order to identify the sources of the specific chemical forms of trace elements. It enables to get better information about their metabolic pathways. In the case of As, it was found, that dietary exposure to inorganic As for children under 3 years old (including rice based food) is estimated to be about 2 to 3...