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SUMMARY:The role of Radionuclide Metrology in Nuclear Physics
DTSTART;VALUE=DATE-TIME:20190319T140000Z
DTEND;VALUE=DATE-TIME:20190319T150000Z
DTSTAMP;VALUE=DATE-TIME:20260306T075632Z
UID:indico-contribution-270-1353@indico.tlabs.ac.za
DESCRIPTION:Speakers: John Keightley (National Physical Laboratory)\nNatio
 nal Metrology Institutes (NMIs) involved in Radionuclide Metrology play an
  important role in enabling societal benefits from nuclear physics researc
 h (1). NMIs are responsible for the development and maintenance of primary
  measurement standards\, distributed to end users to calibrate their own i
 nstruments in an uninterrupted ‘traceability chain’ of calibrations. N
 MIs compare their primary standards (with associated uncertainty budgets) 
 with other NMIs through international comparison exercises co-ordinated by
  the Bureau International des Poids et Mesures (BIPM). The ‘Mutual Recog
 nition Arrangement’ (CIPM MRA) is an arrangement among NMIs to allow for
  the mutual recognition of national measurement standards (and for measure
 ment and calibration certificates issued by NMIs)\, thus meeting the incre
 asing need to provide reliable and quantitative information on the compara
 bility of national measurement services to a variety of users (governments
 \, academic institutions\, manufacturers\, industry\, etc). \n\nA primary 
 standard of radioactivity allows the decay rate from a source to be determ
 ined using a technique which does not itself need calibration\, and underp
 ins developments in characterising nuclear decay scheme parameters (such a
 s photon emission intensities utilised in gamma-ray spectrometry). Since t
 he activity of each radionuclide species depends on unique decay propertie
 s\, different experimental techniques are required for the primary standar
 disations of individual radioisotopes. The particular technique depends on
  the radioactive decay mode(s)\, half-life\, decay scheme of the daughter 
 nucleus and branching ratios for competing decay modes. The main methodolo
 gies used for primary radionuclide standardization are discussed in this p
 resentation.\n\n(1)	Patrick H. Regan\, Steven M. Judge\, John D. Keightley
  & Andy K. Pearce (2018). “Radionuclide Metrology and Standards in Nucle
 ar Physics”\, Nuclear Physics News\, 28:3\, 25-29\n\nhttps://indico.tlab
 s.ac.za/event/82/contributions/1353/
LOCATION:J Block Auditorium
URL:https://indico.tlabs.ac.za/event/82/contributions/1353/
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