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Analytical Suite Page

https://geochem.nrcan.gc.ca/cdogs/content/sui/sui00075_e.htm

Nov 14, 2019 ...: Uranium was determined using a neutron activation method with delayed neutron counting. A detailed description of the method is provided by Boulanger et al. (1975). In brief, a 1 gram sample is weighed into a 7 dram polyethylene vial, capped and sealed. The irradiation is provided by the Slowpoke reactor with an operating flux of 10** 12 neutrons/sq cm/sec

Keyword Page

https://geochem.nrcan.gc.ca/cdogs/content/kwd/kwd040137_e.htm

Nov 14, 2019 ...Keywords RNAA Full List Keyword Definition If chemical separations are done to samples after irradiation to remove interferences or to concentrate the radioisotope of interest, the technique is called radiochemical neutron activation analysis. This technique is performed rarely because of its high cost. Hierarchical classification Technique >> Radiochemical

Laboratory Page

https://geochem.nrcan.gc.ca/cdogs/content/lab/lab00005_e.htm

Nov 14, 2019 ... sediment) NADNC(U) 20s irradiation, 20s count 1 Date modified: 2019-11-14

Analytical Method Page

https://geochem.nrcan.gc.ca/cdogs/content/mth/mth01082_e.htm

Nov 14, 2019 ... >> Fission >> Delayed Neutron Counting Children None Analytical Decomposition: Hierarchical classification Decomposition >> None Children None Associated Analytical Suites: Index Suite ID Suite Name 1 345 AECL (lake sediments) NADNC (U) 20s irradiation, 20s count Date modified: 2019-11-14

Analytical Method Page

https://geochem.nrcan.gc.ca/cdogs/content/mth/mth01077_e.htm

Nov 14, 2019 ... >> Fission >> Delayed Neutron Counting Children None Analytical Decomposition: Hierarchical classification Decomposition >> None Children None Associated Analytical Suites: Index Suite ID Suite Name 1 215 AECL (lake sediments) NADNC (U) 60s irradiation,60s count Date modified: 2019-11-14

Analytical Suite Page

https://geochem.nrcan.gc.ca/cdogs/content/sui/sui00710_e.htm

Nov 14, 2019 ... was zeroed out after acidification and the increase in conductivity was measured after liberation of CO2 by oxidation with ultra-violet irradiation and potassium persulphate. Instrument: Sample material: aqueous Sample weight: unstated Analytical Technique: Hierarchical classification Technique >> Electrochemical techniques >> Conductometry Children None Analytical

Keyword Page

https://geochem.nrcan.gc.ca/cdogs/content/kwd/kwd040149_e.htm

Nov 14, 2019 .... The second unusual feature is that during neutron irradiation, they undergo nuclear fission, 235U predominantly in a thermal neutron flux and 238U, 232Th in a fast neutron flux. These properties have led to neutron activation techniques specific to uranium and thorium. (Potts, 1987, p440) Hierarchical classification Technique >> Radiochemical methods >> Activation

Analytical Suite Page

https://geochem.nrcan.gc.ca/cdogs/content/sui/sui00382_e.htm

Nov 14, 2019 ... species was zeroed out after acidification and the increase in conductivity was measured after liberation of CO2 by oxidation with ultra-violet irradiation and potassium persulphate. Instrument: Sample material: aqueous Sample weight: unstated Analytical Technique: Hierarchical classification Technique >> Electrochemical techniques >> Conductometry Children None

Analytical Suite Page

https://geochem.nrcan.gc.ca/cdogs/content/sui/sui00508_e.htm

Nov 14, 2019 ...Analytical Suite Metadata Becquerel (lake or stream sediment) INAA (Au + Wt) Full List Becquerel, lake or stream sediment; Instrumental Neutron Activation Analysis (Au + Wt) General Methodology: Weighed and encapsulated samples are packaged for irradiation along with internal standards and international reference materials. Samples and standards

Keyword Page

https://geochem.nrcan.gc.ca/cdogs/content/kwd/kwd040150_e.htm

Nov 14, 2019 ...Keywords Delayed Neutron Counting Full List Keyword Definition Irradiate the sample in a neutron flux. Remove the sample from the reactor and, after a suitable decay period, measure the neutron emission count using boron trifluoride neutron spectrometers. Hierarchical classification Technique >> Radiochemical methods >> Activation analysis >> Neutron

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