Determination of picogram amounts of 99tc by neutron activation analysis

Foti, S.; Delucchi, E.; Akamian, V.

doi:10.1016/s0003-2670(01)95001-9

Cited by 27 publications

(6 citation statements)

References 5 publications

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“…Using neutron activation analysis with a thermal neutron flux of «5x10'^ n • cm"^ • s"' a detection limit of 2.5 mBq could be obtained [14]. A prerequisite is that the technetium fraction is in a highly purified aqueous medium during Irradiation and that a fast procedure for separating and measuring the formed '°°Tc, half-Hfe of 15.8 s, is available.…”

Section: Radiometrie Methodsmentioning

confidence: 99%

Ultratrace Analysis of Technetium

Trautmann¹

1993

Radiochimica Acta

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Technetium, trace analysis / Radiometrie methods, mass spectrometry, induetively coupledplasma mass spectrometry / Laser resonance ionization mass spectrometry Abstract For radioecological studies and for the measurement of the boron-8 solar neutrino flux in a geochemical experiment small amounts of technetium have to be determined. The applicability of radiometric methods as well as of mass spectrometry and induetively coupled plasma mass spectrometry for trace analysis of technetium is briefly discussed. In more detail laser resonance ionization mass spectrometry (RIMS) for low-level measurements is presented. Using a three-step, three-colour excitation and ionization scheme an overall detection efficiency of 2 x 10"® was obtained resulting in a detection limit of «10^ atoms (1.6 fg) of technetium. With a reflectron time-of-flight mass spectrometer the sensitivity of RIMS can further be improved by one order of magnitude. By means of a laser ion source, made of extremely pure pyrolytically coated graphite, an enhancement by two Orders of magnitude is possible.

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Section: Radiometrie Methodsmentioning

confidence: 99%

Ultratrace Analysis of Technetium

Trautmann¹

1993

Radiochimica Acta

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“…Since the stable isotopes 99 Ru, 98 Ru, 100 Ru, 98 Mo, and 100 Mo are the main interferences in the mass spectrometric determination of 99 99 Tc has to be separated from the sample prior to irradiation; in addition a fast sample transfer system has to be used to shorten the decay time. NAA is theoretically a more sensitive method for 99 Tc, and a detection limit of 2.5 mBq has been obtained using pre-separation and radiochemical NAA [199][200]. Compared with 100 Tc, 99m…”

Section: Technitium-99mentioning

confidence: 99%

Critical comparison of radiometric and mass spectrometric methods for the determination of radionuclides in environmental, biological and nuclear waste samples

Hou

Roos

2008

Analytica Chimica Acta

342

253

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“…Trace amounts of T c can be detected by neutron activation analysis [22]. Thermal neutron capture cn T c produces the short-lived isotope ' Oorc (t1,* = 15.8 s), which can be readily detected by betaspectrometry.…”

Section: Neutron Activation Analysis (Naa)mentioning

confidence: 99%

Technetium-99 and strontium-90: Abundance determination at ultratrace sensitivity by AMS as signatures of undeclared nuclear reprocessing activity

McAninch¹,

Proctor²

1995

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This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any o f their employes, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, appouatus, product, or process disclocxd, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufactum, or otherwise, does not neaessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or the University o f California. The views and opinions of authors expressed herein do not necessarily state or reflect those o f the United States Government or the University of California, and shall not be used for advert&ing or product endorsement pupses. Thi9reporthasbeenreproduced directly from the best available copy. Available to DOE and DOE contractom from the Office of Scientific and Technid Wormation priceSavailablefrom(615)576-84Ol,FTS626-8401 Available to the public from the NationalTechnicalInformationServie P.O. Box 62, c)ak Ridge, m 37831 U.S. Deptment o f cammenm 5285 Port Royal Rd., Spingf~dd, VA 22161 Portions of this document rnay be illegible in electronic image produck h a g m are produced from the best available original dOl.ument. ! ' Technetium-99 and Strontium-90: Abundance determination at ultratrace sensitivity by A M S as signatures of undeclared nuclear reprocessing activity

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Determination of picogram amounts of 99tc by neutron activation analysis

Cited by 27 publications

References 5 publications

Ultratrace Analysis of Technetium

Ultratrace Analysis of Technetium

Critical comparison of radiometric and mass spectrometric methods for the determination of radionuclides in environmental, biological and nuclear waste samples

Technetium-99 and strontium-90: Abundance determination at ultratrace sensitivity by AMS as signatures of undeclared nuclear reprocessing activity

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