Zobrazeno 1 - 10
of 31
pro vyhledávání: '"C. R. J. Charles"'
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 456:218-221
UO− has so far been the ion of choice for 236U measurement by AMS, but high and stable ionization efficiency for UO− production has been difficult to obtain with some models of Cs+ sputter ion sources. We have experienced considerable difficultie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::72bdb65baf91919cee763674b424c9ab
https://doi.org/10.1016/j.nimb.2019.04.006
https://doi.org/10.1016/j.nimb.2019.04.006
Publikováno v:
Rapid Communications in Mass Spectrometry. 30:867-872
RATIONALE The measurement of (210) Pb provides an assessment of the risk an individual faces of developing lung cancer as a result of their exposure to radon and radon decay products. Existing radiometric techniques are not sensitive enough to detect
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4fb04b2db56ab13d261727c06bba5d4
https://doi.org/10.1002/rcm.7501
https://doi.org/10.1002/rcm.7501
Autor:
C. M. MacDonald, Zakir H. Kazi, N. St-Jean, C. R. J. Charles, R.J. Cornett, William E. Kieser, X.-L. Zhao
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 366:96-103
The analysis of 135Cs/Cs ratios at levels below 10−12 by accelerator mass spectrometry (AMS) would preferably use commonly available negative ion injection systems. The sputter ion sources in these injectors should ideally produce currents of Cs−
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b11bcc182015f1415745a1bfda277c7b
https://doi.org/10.1016/j.nimb.2015.10.026
https://doi.org/10.1016/j.nimb.2015.10.026
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 361:189-192
The isobar separator for anions (ISA) was used together with a 3 MV tandem accelerator mass spectrometer (AMS) to demonstrate the real time (on-line) separation of Te− from I−. Following the ion source mass spectrometry and major retardation to t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8c753a6c9c3bf4f966326d03fca9b83e
https://doi.org/10.1016/j.nimb.2015.03.030
https://doi.org/10.1016/j.nimb.2015.03.030
Autor:
C. M. MacDonald, A.E. Litherland, C. R. J. Charles, X.-L. Zhao, R.J. Cornett, William E. Kieser
Publikováno v:
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 361:554-558
The ratio of anthropogenic 135 Cs and 137 Cs isotopes is characteristic of a uranium fission source. This research evaluates the technique of isotope dilution (yield tracing) for the purpose of quantifying 135 Cs by accelerator mass spectrometry with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d119eccf1bd35f59b9cd7982b827713b
https://doi.org/10.1016/j.nimb.2015.03.008
https://doi.org/10.1016/j.nimb.2015.03.008
Autor:
Pierre-Yves F. Robin, C. R. J. Charles
Publikováno v:
Journal of Structural Geology. 77:1-10
The shapes of objects in rocks are sometimes measured through tomographic sections, either ‘physical’ sections or ‘virtual’ X-ray computed tomography. Approximation of these objects as ellipsoids is often sufficient in these analyses. Here we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::839cd6635648cb69952a2814c30ef704
https://doi.org/10.1016/j.jsg.2015.05.002
https://doi.org/10.1016/j.jsg.2015.05.002
Autor:
William E. Kieser, C. R. J. Charles, X.-L. Zhao, A.E. Litherland, C. M. MacDonald, R. J. Cornett
Publikováno v:
Rapid Communications in Mass Spectrometry. 29:115-118
RATIONALE The ability to measure both 135Cs and 137Cs can provide an estimate of the age and source of Cs isotopes in an environmental sample. Accelerator mass spectrometry (AMS) consistently reports lower abundance sensitivities than other technique
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c15ed12e071228e42e58e998227e4f5e
https://doi.org/10.1002/rcm.7083
https://doi.org/10.1002/rcm.7083
Publikováno v:
Rapid Communications in Mass Spectrometry. 27:2818-2822
RATIONALE An experimental Isobar Separator for Accelerator Mass Spectrometry (ISAMS) instrument has been used to demonstrate an on-line separation of HfF5− from its isobar WF5−. This is necessary, in addition to sample preparation chemistry, for
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::087792a3df114416d794d6110c7f244b
https://doi.org/10.1002/rcm.6748
https://doi.org/10.1002/rcm.6748
Publikováno v:
Physical Review C. 93
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::eacfef63dc69573d24e20a6f7d4ab023
https://doi.org/10.1103/physrevc.93.029901
https://doi.org/10.1103/physrevc.93.029901
Publikováno v:
Physical Review C. 93
The isotope $^{135}\mathrm{Cs}$ is quoted as having a half-life of 2.3 Myr. However, there are three published values ranging from 1.8 to 3 Myr. This research reviews previous measurements and reports a new measurement of the half-life using newly de
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::13b835ad64da14a8a39b2a28ae35abc8
https://doi.org/10.1103/physrevc.93.014310
https://doi.org/10.1103/physrevc.93.014310