Conveners
Radionuclide metrology techniques: 11 Poster contributions
- Ryan Fitzgerald (NIST)
- Christophe BOBIN (LNE-LNHB)
Radionuclide metrology techniques: 4 Oral contributions
- Christophe BOBIN (LNE-LNHB)
- Ryan Fitzgerald (NIST)
Radionuclide metrology techniques: 3 Oral contributions
- Ryan Fitzgerald (NIST)
- Christophe BOBIN (LNE-LNHB)
Radionuclide metrology techniques: 1 Oral contribution and ICRM WG Meeting
- Christophe BOBIN (LNE-LNHB)
- Ryan Fitzgerald (NIST)
Description
Radionuclide metrology techniques
Presented is a poster with an overview of ongoing research projects at NPL
related to Radioactive Gas Metrology. Included are projects focused on the
development of (i) an IR laser spectroscopy technique for measuring 14CO2, and
(ii) a beta-gamma coincidence technique for measuring radioxenon and
radiokrypton. The first project is related to monitoring the ratio of 14C to
12/13C in the...
The procedure followed by the Nuclear Metrology Laboratory (LMN) at the Nuclear and Energy Research Institute (IPEN-CNEN/SP), in Sรฃo Paulo, Brazil, for the primary standardization of a (243Am + 239Pu) solution is described. 243Am decays almost 100% by alpha transitions (with a very small branch, 10-9 %, of spontaneous fission), to 239Np with a Q value of 5438.8 keV, and a half-life of 7367...
The radionuclide iodine-125 (I-125) is an important agent in radiation therapy of various cancers, especially for brachytherapy. Reliable and safe application of I-125 activity require primary standardization as the foundation of traceability. The I-125 decay scheme, proceeding primarily through emission of two photons in coincidence, lends itself to primary standardization through coincidence...
Authors (affiliation): 1. Justyna Marganiec-Gaลฤ zka (POLATOM, Poland), 2. Ewa Koลakowska (POLATOM, Poland), 3. Edyta Lech (POLATOM, Poland), 4. Anna Listkowska (POLATOM, Poland), 5. Paweล Saganowski (POLATOM, Poland), 6. Zbigniew Tymiลski (POLATOM, Poland), 7. Tomasz Ziemek (POLATOM, Poland)
Tin-113 decays by electron capture to three excited levels of In-113: 1029.73 keV - 0.00103%,...
Radioactive noble gases and tritium are emitted from nuclear reactors when electricity is produced, accidents occur and as the result of nuclear weapons testing or use and hence are of great interest to the nuclear forensics communities. In addition, some radioactive noble gases serve critical medical functions, as is the case of Xe-133 in the diagnostic imaging for certain lung cancers. The...
Authors: 1. M.L. Smith, 2. W.M. van Wyngaardt, 3. A.H.H. Bowan, 4. C.M.B. Keevers, 5. M. Zarifi and 6. E.L. Clark (all from ANSTO)
Radionuclides have been standardized by 4ฯ(PC)-ฮณ coincidence counting at ANSTO using an atmospheric pressure proportional counter (PC) with conventional analogue electronics since the 1970s. The ANSTO Radionuclide Metrology (RM) group extended this capability by...
In 1988 LMRI from IFIN-HH carried out the first measurements of Cd-109 standardization within an international comparison organized by BIPM. The measurements were performed using the 4ฯ(PC)ce-NaI(Tl)X coincidence counting and Ge(Li) ฮณ-ray spectrometer.
This paper presents the results obtained by LMRI, IFIN-HH of Cd-109 standardization using two methods within the scope of an international...
Authors (affiliation): 1. Agung Agusbudiman (UST, South Korea), 2. Kyoung Beom Lee (KRISS, South Korea), 3. Jong Man Lee (KRISS, South Korea), 4. Sang Hoon Hwang (KRISS, South Korea), 5. Byoung Chul Kim (KRISS, South Korea).
The copper-64 (64Cu) is one of the important radiopharmaceuticals used in nuclear medicine. The nature of its decay through three different modes, ฮฒ+, ฮฒ-, and electron...
Authors (affiliation): 1. Ken-ich Mori (Kindai Univ., Japan), 2. Takahiro Yamada (Kindai Univ., Japan), 3. Yasushi Sato (NMIJ/AIST, Japan), 4. Kotaro Nagatsu (QST, Japan), 5. Hidetoshi Kikunaga (Tohoku Univ., Japan).
Recently, 225Ac has been proposed for Targeted Alpha Therapy. In such medical applications and studies, quantitative activity measurements for evaluating the accumulation of...
Monte Carlo (MC) simulations are a useful tool in benchmarking a range of calibration services, from confirming ionization chamber calibration factors to aiding the development of novel calibration systems. Different MC programs can be more tuned towards different applications and user populations. However, due to the difference in the underlying physics and transport mechanisms, different MC...
Authors (affiliation): 1. Minji Han (KRISS, South Korea, UST, South Korea), 2. Sanghoon Hwang (KRISS, South Korea, UST, South Korea), 3. A. Agusbudiman (KRISS, South Korea, UST, South Korea, BATAN, Indonesia), 4. J.M. Lee (KRISS, South Korea, UST, South Korea), 5. K.B. Lee (KRISS, South Korea, UST, South Korea), 6. B.C. Kim (KRISS, South Korea), 7. D.H. Heo (KRISS, South Korea).
Korea...
Due to a constant demand for standards of the radionuclide 125I, LNHB and PTB decided to verify their calibration capabilities by means of a bilateral comparison to determine the activity concentration of the same 125I solution. As electron-capture radionuclide with a rather high atomic number, 125I must be regarded as difficult to measure. The situation is partly exacerbated by the fact that...
The selective sampling method (SESAM) was proposed by Mรผller from the BIPM, as an alternative to the ฮฒ-ฮณ coincidence counting. The SESAM does not need to introduce a coincidence resolving time during which accidental coincidences could be recorded. Correcting of these accidental coincidences is the trickiest part of ฮฒ-ฮณ coincidence counting. Compare to coincidence or anticoincidence...
Technetium-99m, the short-lived metastable nuclear isomer of Tc-99 is one of the most relevant medical radionuclides world-wide, due to its extensive use in medical imaging and functional studies of various organs. Nevertheless, from a metrological point of view, the absolute standardization of Tc-99m is far from straightforward due to its short half-life and its low energy conversion electron...
Authors: 1. M. Teresa Durรกn (IRA, Switzerland) 2. Youcef Nedjadi (IRA, Switzerland) 3. Frรฉdรฉric Juget (IRA, Switzerland) 4. CLaude Bailat (IRA, Switzerland)
Digital electronic systems for primary activity measurement methods are gaining ground in the reference laboratories all over the radionuclide metrology community. A wide range of alternatives is available on the market and the choice...
Authors: 1. Rio Furukawa (NMIJ, Japan), 2. Miroslaw Janik (NIRS, Japan), 3. Satoshi Kodaira (NIRS, Japan), 4. Seiya Manabe (NMIJ, Japan), 5. Tetsuro Matsumoto (NMIJ, Japan), 6. Chihiro Shimodan (NMIJ, Japan), 7. Yasushi Sato (NMIJ, Japan), 8. Hideki Harano (NMIJ, Japan).
Radon (Rn-222) and its progeny is regarded as the largest contributor to an effective dose for the public...
Authors: Boxue Liu, Richard Britton, Seokryung Yoon, Ashley Vaughan Davies, Nikolaus Hermanspahn, Gohla Herbert, Jonathan Bare, Peter Jansson, Martin Kalinowski
Affiliation: CTBTO, Vienna, Austria
The current address is Swedish Defence Research Agency, Stockholm, Sweden
The accurate measurement of radioxenon isotopes plays an important role in the radionuclide component of the...
Authors (affiliation): 1. Robert Shearman (NPL, UK), 2. Sรฉan M. Collins (NPL, UK / University of Surrey, UK), 3. John D. Keightley (NPL, UK).
Cadmium-109 is one of the most challenging radionuclides to standardise; the pure electron capture decay from the ground state (I pi = 5/2+; T1/2 = 461.9 a) populates one delayed (I pi = 7/2+; T1/2 = 39.7 s) state only, followed by an 88.0 keV gamma...
Authors (affiliation): Emma Braysher (NPL, UK), Heather Thompkins (NPL, UK), Saskia Burke (NPL, UK), Hibaaq Mohamud (NPL, UK), Frankie Falksohn (NPL, UK).
A number of long-lived radionuclides suffer from half-life measurements that are outdated, have inconsistencies in the values obtained and/or limitations with regards to the uncertainty budget. When used in combination with absolute...
