@inbook {1387, title = {Installation of a 134-sample MC-SNICS at the NOSAMS facility and first results}, booktitle = {Symposium of NorthEastern Accelerator Personnel, Oak Ridge National Lab., USA, October 25-28, 1999}, year = {2001}, note = {id: 1718}, month = {2001}, pages = {49-55}, publisher = {World Scientific}, organization = {World Scientific}, address = {Oak Ridge, TN}, author = {Bellino, Mary and von Reden, Karl F. and Schneider, Robert J. and Long, Patricia Long and Healy, Richard}, editor = {Hensley, D. K.} } @conference {1564, title = {The Antarctic Radiocarbon Storage Ring}, booktitle = {8th International Conference on Accelerator Mass Spectrometry}, year = {1999}, note = {id: 1791}, month = {1999}, address = {Vienna, Austria}, author = {Schneider, Robert J. and McNichol, Ann P. and von Reden, Karl F. and Elder, Kathryn L. and Gagnon, Alan R. and Key, Robert M. and Quay, Paul D.} } @inbook {1471, title = {Installation of a 134-Sample MC-SNICS Ion Source at NOSAMS and first results}, booktitle = {Accelerator Mass Spectrometry, Proceedings of the Eighth International Conference on Accelerator Mass Spectrometry}, year = {1999}, note = {id: 1724}, month = {1999}, pages = {247-251}, publisher = {North-Holland}, organization = {North-Holland}, address = {Vienna, Austria}, author = {von Reden, Karl F. and Bellino, Mary and Long, Patricia and Schneider, Robert J. and Loger, Roger}, editor = {Kutschera, W.} } @inbook {1472, title = {A Silent Tandetron AMS System}, booktitle = {Symposium of North Eastern Accelerator Personnel, October 13-15, 1997, SNEAP XXXI}, year = {1999}, note = {id: 1722}, month = {1999}, pages = {61-68}, publisher = {World Scientific Publishing Co.}, organization = {World Scientific Publishing Co.}, address = {Forschungszentrum Julich, Germany}, author = {von Reden, Karl F. and Schneider, Robert J.}, editor = {Dworschak, F.} } @article {2257, title = {A Correction for Aberrations in the Woods Hole Recombinator. Symposium of North-Eastern Accelerator Personnel}, journal = {World Scientific}, volume = {SNEAP 1996}, year = {1998}, note = {id: 1664}, month = {1998}, pages = {123-128}, author = {Schneider, Robert J. and McNichol, Ann P. and von Reden, Karl F. and Elder, Kathryn L. and Gagnon, Allan R. and Key, Robert M. and Quay, Paul D.} } @conference {1691, title = {Microscale AMS 14C Measurement at NOSAMS}, booktitle = {16th International 14C Conference}, year = {1998}, note = {id: 1502}, month = {1998}, author = {Pearson, Ann and McNichol, Ann P. and Schneider, Robert J. and von Reden, Karl F.} } @conference {1692, title = {Microscale AMS (super 14) C measurement at NOSAMS}, volume = {40}, year = {1998}, note = {id: 2237; Source type: conferencepapers\&proceedings; Object type: Article; Object type: Conference Paper; Copyright: GeoRef, Copyright 2007, American Geological Institute.; CSAUnique: 1999-044438; AccNum: 1999-044438; ISSN: 0033-8222; CODEN: RACAAT}, month = {1998}, pages = {61-75}, publisher = {University of Arizona, Department of Geosciences, Tucson, AZ, United States (USA)}, organization = {University of Arizona, Department of Geosciences, Tucson, AZ, United States (USA)}, address = {United States (USA)}, abstract = {Techniques for making precise and accurate radiocarbon accelerator mass spectrometry (AMS) measurements on samples containing less than a few hundred micrograms of carbon are being developed at the NOSAMS facility. A detailed examination of all aspects of the sample preparation and data analysis process shows encouraging results. Small quantities of CO (sub 2) are reduced to graphite over cobalt catalyst at an optimal temperature of 605 degrees C. Measured (super 14) C/ (super 12) C ratios of the resulting targets are affected by machine-induced isotopic fractionation, which appears directly related to the decrease in ion current generated by the smaller sample sizes. It is possible to compensate effectively for this fractionation by measuring samples relative to small standards of identical size. Examination of the various potential sources of background (super 14) C contamination indicates that the sample combustion process is the largest contributor, adding ca. 1 mu g of carbon with a less-than-modern (super 14) C concentration.}, keywords = {03, absolute age, accelerator mass spectroscopy, accuracy, C-14, C-14/C-12, carbon, Carbon dioxide, combustion, data processing, Geochronology, graphite, isotope fractionation, isotopes, mass spectroscopy, mathematical methods, methods, native elements, radioactive isotopes, sample preparation, size, spectroscopy, Stable isotopes}, doi = {10.1017/S0033822200017902}, url = {http://hdl.handle.net/10150/653650}, author = {Pearson, Ann and McNichol, Ann P. and Schneider, Robert J. and von Reden, Karl F. and Zheng, Yan} } @conference {1800, title = {(super 14) C AMS measurements of}, volume = {40}, year = {1998}, note = {id: 2239; Source type: conferencepapers\&proceedings; Object type: Article; Object type: Conference Paper; Copyright: GeoRef, Copyright 2007, American Geological Institute.; CSAUnique: 1999-044459; AccNum: 1999-044459; ISSN: 0033-8222; CODEN: RACAAT}, month = {1998}, pages = {247-253}, publisher = {University of Arizona, Department of Geosciences, Tucson, AZ, United States (USA)}, organization = {University of Arizona, Department of Geosciences, Tucson, AZ, United States (USA)}, address = {United States (USA)}, abstract = {The NOSAMS facility at Woods Hole Oceanographic Institution has started to develop and apply techniques for measuring very small samples on a standard Tandetron accelerator mass spectrometry (AMS) system with high-current hemispherical Cs sputter ion sources. Over the past year, results on samples ranging from 7 to 160 mu g C showed both the feasibility of such analyses and the present limitations on reducing the size of solid carbon samples. One of the main factors affecting the AMS results is the dependence of a number of the beam optics parameters on the extracted ion beam current. The extracted currents range from 0.5 to 10 mu A of (super 12) C (super -) for the sample sizes given above. We here discuss the setup of the AMS system and methods for reliable small-sample measurements and give the AMS-related limits to sample size and the measurement uncertainties.}, keywords = {03, absolute age, accelerator mass spectroscopy, C-14, carbon, dilution, Geochronology, ions, isotopes, mass spectroscopy, precision, radioactive isotopes, sample preparation, spectroscopy, volume}, author = {von Reden, Karl F. and McNichol, Ann P. and Pearson, Ann and Schneider, Robert J.} } @conference {1758, title = {Progress of the NOSAMS facility WOCE (super 14) C data analysis}, volume = {38}, year = {1996}, note = {id: 2242; Source type: conferencepapers\&proceedings; Object type: Article; Object type: Conference Paper; Copyright: GeoRef, Copyright 2007, American Geological Institute.; CSAUnique: 1999-071631; AccNum: 1999-071631; ISSN: 0033-8222; CODEN: RACAAT}, month = {1996}, pages = {123}, publisher = {University of Arizona, Department of Geosciences, Tucson, AZ, United States (USA)}, organization = {University of Arizona, Department of Geosciences, Tucson, AZ, United States (USA)}, address = {United States (USA)}, keywords = {02D, 07, accelerator mass spectroscopy, C-14, carbon, Isotope geochemistry, isotopes, mass spectroscopy, Oceanography, Pacific Ocean, progress report, radioactive isotopes, report, sea water, spectroscopy}, author = {von Reden, K. F. and McNichol, A. P. and Schneider, Robert J.} }