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Plenary Talks (Listed alphabetically by Last Name ) |
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Novel Concepts For Multipurpose AMS Systems Family Name: Lachner Given Name: Johannes Johannes Lachner is a staff scientist at Helmholtz-Zentrum Dresden-Rossendorf in the group of Accelerator Mass Spectrometry and Isotope Research. He works at the DREsden AMS system DREAMS and constructs a second-generation ion-laser interaction setup for the AMS system HAMSTER (Helmholtz Accelerator Mass Spectrometer Tracing Environmental Radionuclides) that is planned to go into operation in Dresden by end of this year. Previously, he studied Physics at the Technical University in Munich and finished his diploma in 2008 with a thesis on accelerator mass spectrometry of actinides. He continued in the field with a PhD thesis at the Laboratory of Ion Beam Physics of ETH Zurich and worked at the compact AMS facility Tandy with a focus on environmental applications, particularly on measurements of 10Be and actinides at low beam energies. In 2013, after a short Post-Doc stay at the Swiss EAWAG, he joined VERA (Vienna Environmental Research Accelerator) at the University of Vienna. During his time there, he performed measurements using the traditional AMS technique and incorporated an ion cooler for laser photodetachment into the AMS system. This way, he improved measurements of the radioisotopes 36Cl and 26Al and made first steps towards the measurement of 135Cs and 137Cs.
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New developments in Ion-Laser InterAction Mass Spectrometry Family Name: Martschini Given Name: Martin Dr. Martin Martschini holds a senior scientist position at the VERA-AMS facility in Vienna, where he directs his research efforts towards the advancement of AMS technology with a particular emphasis on the suppression of isobaric interferences. During his PhD (finished 2012), he managed to make VERA the first 3-MV-accelerator capable of separating the isobars 36S and 36Cl down to environmental levels. In his initial postdoctoral years, he became the project leader of the Ion-Laser Interaction Mass Spectrometry (ILIAMS) setup, which employs laser photodetachment of negative ions for isobar suppression in AMS. Following a postdoctoral appointment at the 14 MV-HIAF-AMS-facility of the Australian National University in Canberra, he rejoined the VERA team in 2017, where he has continued his work on the detection of previously inaccessible trace isotopes with ILIAMS. Recently, the VERA facility has achieved the most sensitive detection of 90Sr in the environment.
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Retrospective view on progress and recent developments in AMS technology Family Name: Synal Given Name: Hans-Arno Hans-Arno Synal, accelerator mass spectrometry specialist with background in nuclear and atomic physics, studied Physics at Rheinische Friedrich-Wilhelms-Universität Bonn, and graduated in 1985. He moved to Swiss Federal Institute of Technology Zurich (ETHZ) and obtained his PhD on “Accelerator mass spectrometry with 36Cl” in 1989. Following a post-doctoral fellowship at the Institute of Intermediate Energy, ETH Zurich, he became research scientist at the Paul Scherrer Institute. Since 2008, he is heading the ETH Laboratory of Ion Beam Physics (LIP) and he was appointed as honorary Professor at ETH Zurich in 2011. Since August 2023, he reached his retirement age and stepped back from his duties at ETH. At present he is acting as scientific advisor at the Ionplus AG.
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The environmental tracing studies using Chinese loess 10Be at Xi’an AMS Center Family Name: Zhou Given Name: Weijian Prof. Zhou is a member of the Chinese Academy of Sciences (2009), a member of the Academy of Sciences for the Developing World (2010) and an American Geophysical Union (AGU) Fellow (2016). She is a Professor and Director of the Academic Committee of the State Key Laboratory of Loess and Quaternary Geology (SKLLQG), and former Director of the Institute of Earth Environment, Chinese Academy of Sciences (IEECAS). She proposed and headed the construction of Accelerator Mass Spectrometry (AMS) Center in Xi’an, which is designated as one of the ten “National Platform of Science Instrument Centers” in China, capable of carrying out high precision measurements on multiple nuclides (10Be, 14C, 26Al, 129I, etc.). She has been engaged in Quaternary geology and paleo-climate change studies and is at the forefront of developments in using multi-nuclide tracers for understanding environmental change at both the regional and global scale. She has also applied fundamental research results to address social sustainable development. Her achievements have been recognized by international scientific communities. She serves as an associated editor of Radiocarbon, and served as a member of PAGES/CLIVAR Working Group, a council member of the International Geosciences Program (IGCP) UNESCO, and a member of the Union Fellows Committee at AGU, respectively. She has won 3 National Natural Science Awards, 5 first-class provincial- and ministerial-level Science and Technology Awards.
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Distinct down-core variations of sedimentary OC 14C-ages in the eastern Chinese marginal seas Family Name: Zhao Given Name: Meixun (Max) Dr. zhao received his Ph.D. from the Scripps Institution of Oceanography, University of California, San Diego, USA. From 1991 to 1994, he was a Postdoctoral Research Associate at the University of Bristol, UK. From 1994 to 2005, he was a Researcher at University of Massachusetts-Boston, then Assistant Professor and Associate Professor at Dartmouth College, USA. From 2005 to 2008, he was a Distinguished Professor at Tongji University. Since 2008, he has been a Professor at Ocean University of China. His research interests include marine organic geochemistry and carbon isotope marine chemistry. He recently focuses on the organic carbon cycle and carbon sink effect of river-estuarine-coastal ocean continuum. He has led several national projects, i.e. the Ministry of Science and Technology (MOST) 973 Program, the NSFC Fund for Creative Research Groups, the Program of Introducing Overseas Talents to Chinese Universities (“111” Program). He has served as panel members for the NSFC and MOST in China. He authored and co-authored more than 190 SCI publications.
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Partially Invited Talks (Listed alphabetically by Last Name ) |
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Presence of 233U, 236U, 237Np, 239Pu and 240Pu in the continental shelves of Angola and Namibia Actinides measurements on the 1 MV AMS system at the Centro Nacional de Aceleradores (CNA, Seville, Spain): How far can we go? Family Name: Chamizo Given Name: Elena Elena Chamizo is Research Scientist at the Centro Nacional de Aceleradores (CNA, Seville, Spain). She received her Ph.D. in Sciences at the University of Seville in 2009. In 2005, the first multi-elemental and compact 1 MV AMS system designed and manufactured by HVEE, was installed at the CNA. Since then, she has worked full-time at this facility, mostly consolidating a research line on the analysis of actinides radionuclides (233U, 236U, 237Np, 239Pu, 240Pu, 241Pu, 242Pu, 244Pu, 241Am, 243Am).
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The Zurich Sea Water (ZSW) intercomparison for 236U and other actinides Family Name: Christl Given Name: Marcus Dr. Marcus Christl studied Physics at the University of Heidelberg, Germany with a focus on Environmental Physics. He completed his PhD at the Heidelberg Academy of Sciences and Humanities in the Paleoclimate Group in 2003. Dr. Christl joined the ETH Zurich Laboratory of Ion Beam Physics (LIP), Switzerland as a postdoc in 2005. At LIP, he developed new AMS setups for the actinides and he was leading developments of novel applications for anthropogenic actinides. In addition, he was co-leading the development of Laser Ablation AMS, a novel sampling technique for 14C in carbonates and he contributed substantially to the reconstruction of solar activity using cosmogenic nuclides in tree rings and ice cores. Dr. Christl was appointed Head of LIP in August 2023.
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The NAUTILUS project: The story of an AMS facility on the move Family Name: Collon Given Name: Philippe Prof. Collon's research work involves the development of detection techniques using Accelerator Mass Spectrometry (AMS). AMS has traditionally been used to detect environmental tracers at and below their natural abundance levels (10Be, 14C, 36Cl,… ). Its main attribute is its power to accelerate and analyze ions of radioactive nuclei with extremely high sensitivity. However many aspects of this powerful technique cannot only be used for research involving radioactive-beam physics, but also used to study nuclear reactions which, under stellar conditions, involve in most cases very low counting rates and high isobaric backgrounds. Prof. Collon has been developing AMS for noble gas tracers and is presently working on applying this technique to study nuclear reactions of interest in stellar nucleosynthesis. He is also involved in the development of a high intensity, low energy ion source that will be used to measure reaction rates in conditions much closer to those prevailing in stellar environments than previously.
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Fallout isotopes 239-241,244Pu and 236U in a lake sediment from New Zealand Family Name: Hotchkis Given Name: Michael Dr Hotchkis obtained a BSc degree in physics at the University of Edinburgh followed by a PhD in nuclear physics at the Australian National University. He continued in nuclear structure physics research with postdoctoral fellowships at Lawrence Berkeley Laboratory and the University of Manchester, with research focussed on the structure of nuclei far from stability. Since joining ANSTO, Dr Hotchkis has contributed to the applications of accelerator techniques, first with ion beam analysis and then with the establishment of Accelerator Mass Spectrometry (AMS) at ANSTO. He has led the development of AMS methods for actinides analysis including the establishment and utilisation of this capability on the Vega 1MV AMS system in the past decade. Recent areas of application have covered nuclear safeguards, radioecology, nuclear astrophysics, sediment chronology and environmental radioactivity.
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Tracing environmental processes using long-lived radionuclides in Xi’an AMS Center Family Name: Hou Given Name: Xiaolin Xiaolin Hou, professor of Institute of Earth Environment, Chinese Academy of Sciences (IEECAS), and director of Xi’an AMS Center. He was a full professor in Technical University of Denmark (DTU) in 2013.5-2023.9 and senior scientist in Risø National Laboratory and DTU, Denmark from 2003, and joined IEECAS from 2015. Prof. Hou is a radiochemist with expertise in environmental radioactivity and radioecology, characterization of nuclear waste, analytical methodology for radionuclides with AMS, ICP-MS and nuclear spectrometry. He has worked on AMS for 20 years and specialized in the AMS analysis of 129I and its species for tracing environmental processes. Prof. Hou has leaded and coordinated more than 25 research projects funded by EU and China research foundations, author/coauthored more than 320 research articles in peer reviewed scientific journals with SCI h-index of 44. Prof. Hou has supervised more than 50 graduate students. He is the associated editor of Journal of Environmental Radioactivity, as well as the editorial board member of 4 other scientific journals.
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The Physical problems that exist on AMS Family Name: Jiang Given Name: Shan Shan Jiang, professor of Chian institute of Atomic Energy, an expert with outstanding contributions to national environment and energy, has been engaged in the research of AMS since 1988. He has built the first AMS device in China in 1990, and has carried out the highly sensitive measurements of nuclides such as 14C, 10Be, 36Cl, 41Ca, and 129I, and the applications of AMS in national resources, the environment, the ocean, and life-science. In recent years, he has focused on international frontier research, including “one breath” disease diagnosis and archaeology using 41Ca, etc. Since 2010, he has concentrated on the research and development of AMS instruments, guiding the direction of national AMS facility development.
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On some unsettled half-lives of AMS radionuclides Family Name: Kutschera Given Name: Walter Born in Vienna in the year when the Second World War started and Sigmund Freud died, Prof. Walter Kutschera received his Ph.D. in Physics at the University of Graz in 1965. He then spent 27 years away from Austria, working in basic and applied nuclear physics research at various Institutions in Heidelberg, Munich, Tokyo, Chicago, and Jerusalem, mainly in connection with tandem accelerators. Since 1978, he worked in the field of accelerator mass spectrometry (AMS), and his research covers many sections of AMS, from Archaeology to Astrophysics. After 15 years in the Physics Division of Argonne National Lab in Chicago, he moved back in 1993 to his home country Austria, and became a Professor of Physics at the University of Vienna. There, he established the Vienna Environmental Research Accelerator (VERA), a dedicated AMS facility for ‘all’ isotopes, based on a 3-MV pelletron tandem accelerator. Now an Emeritus Professor of Physics at the University of Vienna, he received in 2010 the Erwin Schrödinger Prize of the Austrian Academy of Sciences for his life-work in AMS. In 2024, he became an honorary member of the Austrian Academy of Sciences in Vienna (https://www.oeaw.ac.at/en/m/kutschera-walter).
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Identifying Old Ice and Water with Atom Trap Trace Analysis Family Name: Lu Given Name: Zhentian Zheng-Tian Lu is University Distinguished Professor, Yan Jici Professor of Physics and the Dean of the School of the Gifted Young, the University of Science and Technology of China (USTC). He received a B.Sc. from USTC in 1987 and a Ph.D. from UC Berkeley in 1994. Prior to rejoining USTC in 2015 under the Chinese National Recruitment Program for Global Experts, he was a Senior Scientist at Argonne National Laboratory and a Professor (part-time) at The University of Chicago. Throughout his career, Lu has been developing techniques of laser manipulation and laser spectroscopy of atoms, and applying these techniques to ultrasensitive trace analysis, studying nuclear structure, and testing fundamental symmetries. He received a U.S. Presidential Early Career Award in 2000, was elected a Fellow of the American Physical Society in 2006, and received the Society’s Francis M. Pipkin Award in 2009. He served as a member of the U.S. Nuclear Science Advisory Committee in 2011-2013, and as Chair of the Topical Group of Precision Measurement and Fundamental Constants of the American Physical Society in 2015-2016. He serves on the advisory boards of the Max Planck Institute for Nuclear Physics, Hefei National Research Center for Interdisciplinary Sciences at the Microscale, and the School of Physics and Astronomy of Shanghai Jiao Tong University.
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Study on natural iodine isotope system Family Name: Matsuzaki Given Name: Hiroyuki Prof.Matsuzaki graduated from The University of Tokyo in 1990. During his doctoral studies in 1995, he first encountered Accelerator Mass Spectrometry (AMS). In 1998, he designed a gas ionization chamber for the final detector of AMS, which has been used as the main detector at MALT ever since. Since becoming the head of MALT in 2001, he has strived to transform MALT into a true multi-nuclide AMS facility, not only capable of measuring multiple nuclides but also facilitating a wide range of applications using these nuclides. In 2002, he introduced in situ cosmogenic radionuclide (CRN) applications at MALT by inviting morphologists. He developed the Iodine-129 method and expanded its applications, particularly after the 2011 disaster. With the support of excellent students and collaborators, various application studies using Iodine-129 have been conducted. Recently, a Uranium-236 AMS system has been developed and applied to oceanography studies. He is also interested in novel techniques to expand the possibilities of AMS and is conducting fundamental experiments on the interaction between laser light and negative ions.
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10Be AMS MEASUREMENTS AND CHRONIC BERYLLIUM DISEASE (CBD) Family Name: Nishiizumi Given Name: Kunihiko Dr. Nishiizumi Kunihiko, Senior Space Fellow at the University of California, Berkeley, Space Sciences Laboratory, has a keen interest in cosmochemistry and nuclear chemistry. His research focuses on the cosmic ray exposure histories of extraterrestrial materials (such as meteorites, lunar samples, and micrometeorites) and terrestrial materials (including surface rocks and soils) using cosmic-ray produced (cosmogenic) nuclides such as 129I, 53Mn, 10Be, 26Al, 36Cl, and 41Ca; secular variation of solar and galactic cosmic rays. Dr. Nishiizumi is a Fellow of the Meteoritical Society and received The Geochemical Society of Japan Award in 2000.
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The 90s–Exciting opportunities for AMS at the Heavy Ion Accelerator Facility Family Name: Pavetich Given Name: Stefan Dr. Stefan Pavetich received his PhD in Physics from the Technical University of Dresden. His PhD work focused on ion source development for Accelerator Mass Spectrometry and was conducted at the Helmholtz-Zentrum Dresden-Rossendorf. Currently, he is a Research Fellow in the Department of Nuclear Physics and Accelerator Applications at the ANU. His research work to date has focused on two areas: interdisciplinary research using Accelerator Mass Spectrometry (AMS) with a focus on astrophysical applications, and technical development of AMS for non-routine isotopes such as 93Zr, 99Tc or 60Fe.
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Improvement of Cl-36 measurements at the Tsukuba 6 MV AMS facility Family Name: Sasa Given Name: Kimikazu Dr. Sasa is with the Department of Physics, Institute of Pure and Applied Sciences in Advanced Accelerator Section (CRiES) at University of Tsukuba. He has been working at the Tandem Accelerator Facility at the University of Tsukuba since 1999 and am currently the Director of the facility. Since 2014, he has been working on IBA and AMS using the 6MV tandem accelerator.
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CarbonWatch-Urban: Application of atmospheric radiocarbon measurements to evaluate and monitor urban carbon dioxide emissions Family Name: Turnbull Given Name: Jocelyn Jocelyn Turnbull holds joint appointments at GNS Science, New Zealand the University of Colorado, USA, and co-chairs the WMO Integrated Global Greenhouse Gas Information System (IG3IS) program. Jocelyn leads the GNS Science Rafter Radiocarbon Laboratory, which maintains expertise in a wide range of radiocarbon applications including radiocarbon in atmospheric trace gases, paleo-environmental and paleo-hazard chronology, soil and water carbon processes. Her research leverages radiocarbon to investigate the modern carbon cycle, particularly the source and fate of fossil fuel derived CO2. Connecting emissions science to policy outcomes is a key component of Jocelyn’s research.
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60Fe and 182Hf nucleosynthesis via double neutron capture Reproducibility and accuracy of actinide AMS–measurement limits from high-precision studies on 235U(n,γ) 236U Family Name: Wallner Given Name: Anton Prof. Anton Wallner is since 2019 Head of the Department ‘Accelerator Mass Spectrometry and Isotope Research’ at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR), Germany, and holds a Chair as a Full Professor at TU Dresden. He remains also a Visiting Fellow at The Australian National University, Canberra. He graduated from the Univ. of Vienna (Austria) and held positions at the TU Munich (Germany), Univ. of Vienna, ANSTO (Australian Nuclear Science and Technology Org0anisation, Sydney) and the ANU. His main research areas within AMS include nuclear astrophysics, nuclear physics, radionuclides in the environment and is involved in new technological developments. He is member of the n_TOF collaboration at CERN and involved in nuclear data activities at the IAEA in Vienna.
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Establishing matrix backgrounds and radionuclide concentrations for the metrology of new, SI-traceable isotope standards for the determination of key radioactive pollutants in the environment by (accelerator) mass spectrometry Exploring the lowest levels of environmental 90Sr/Sr Family Name: Winkler Given Name: Stella (Stephan) Stella Winkler has been in the research field of AMS since her master’s thesis work at the University of Vienna (MSc, 2002). She received her PhD at the Australian National University in 2008. Both of the theses had a strong focus on method development for heavy isotopes. Further stations were the Australian Nuclear Science and Technology Organisation (Australia), Univ. of Vienna (Austria), iThemba LABS (South Africa), and – since 2021 – the Helmholtz-Zentrum Dresden-Rossendorf (Germany). Her focus was on heavy isotopes, but she has also published on AMS of the original AMS isotopes, such as 14C, 10Be, 26Al, and 36Cl. During her Post-doc in Vienna she worked 236U and demonstrated the bomb-pulse for this isotope in a coral record. At iThemba LABS South Africa Dr. Stella Winkler commissioned the first AMS facility on the African continent for the measurement of 14C, 10Be, and 26Al. At HZDR, with the possibilities of both the established DREAMS facility and the HAMSTER facility (in commissioning), she is pursuing research projects both in cosmogenic isotopes, actinides, and new isotopes such as 90Sr.
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Radiocarbon tracing deep carbon emissions from the Tibetan Plateau Family Name: Sheng Given Name: Xu Prof. Sheng Xu received his Ph.D. from the University of Tokyo in 1995. He has worked at Lanzhou Institute of Geology, Chinese Academy of Sciences (1983-1991), Geological Survey of Japan (1995-1997), Japan Atomic Energy Agency (1997-2002) and University of Glasgow (2002-2018). He has been a full-time professor in Tianjin University since 2018. His current research mainly includes (1) environmental and ecological effects of deep carbon release, and (2) cosmogenic nuclides dating and tracing the Quaternary surface geological processes.
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20 years of progress on the sealed-tube zinc reduction method of graphitization for 14C AMS measurement at the UCI KCCAMS facility Family Name: Xiaomei Given Name: Xu Dr. Xiaomei Xu received her Ph.D. from the University of Southern California, USA, in 1993. From 1993 to 2001, she served as a Research Associate Scientist at the California Institute of Technology. In 2002, she joined the Keck Carbon Cycle Accelerator Mass Spectrometry Research Group at the University of California, Irvine, USA, as a Project Scientist. Dr. Xu's research focuses on the study of carbon cycles in the atmosphere and ecosystems using ¹⁴C and ¹³C measurements. Her work includes atmospheric ¹⁴CO2 observations and applications in monitoring anthropogenic CO2 emissions, as well as ¹⁴CH4 measurements from permafrost, lakes, groundwater, and peatlands. She has been at the forefront of various methodological developments, including graphitization (particularly ultra-small sample preparation for radiocarbon measurement on AMS), rapid headspace extraction methods for DIC-¹⁴C (dissolved inorganic carbon), rapid extraction/graphitization methods for ¹⁴CH4, wet-chemical oxidation methods for DOC-¹⁴C (dissolved organic carbon), single-step sealed tube graphitization, and alternative time-integrated air sampling methods such as using molecular sieves and annual plants. Dr. Xu is also highly experienced in compound-specific ¹⁴C measurement and its applications.
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Survey of naturally occurring 236U with direct-AMS Family Name: Zhao Given Name: Xiaolei Xiaolei Zhao obtained his B.Sc. degree in 1985 from Department of Technical Physics, Peking University, majoring in nuclear physics. From 1988 he took on M.Sc. and Ph.D. programs on AMS at IsoTrace Laboratory, Department of Physics, University of Toronto, and graduated in 1993. He continued at IsoTrace as a postdoctoral fellow and then research associate, carrying on 129I analyses using the first low energy AMS setup for heavy isotopes and conducted related research and development activities. He participated in the new 3MV-AMS system specification of A. E. Lalond AMS Laboratory, University of Ottawa, and moved there to carry on in 2022 as a senior scientist. He was elected in 2003 by Chinese “100 Scholars Program” to assist in the establishment of Xi’an AMS Center. He was also invited in 2016 to assist in the new 1MV-AMS system specification for BNU-AMS, Beijing Normal University, and moved there to carry on in 2022 as a senior scientist. Some academic achievements include: discovery of naturally-occurring 236U in uranium ore (1993); experimental confirmation of the existence of the smallest di-anion LiF32- (2004); studied systematically the MFn- yield patterns from PbF2 matrix-assisted sputter targets for most elements across the Periodic Table (2009); studied theoretically the principle and design of highly efficient linear RF ion-guides for furthering the development of low energy AMS (2014); observed and studied a recycled sputtering phenomenon within the presently popular high intensity sputter ion sources (2015); surveyed 236U/238U and 187Os/188Os ratios of 310 uranium ore concentrates (2019).
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Compact AMS at PKU - 20 years’ progress in instrumentation and application Family Name: Zhou Given Name: Liping Liping Zhou, Boya Distinguished Professor at Department of Geography, Peking University, was trained as a Quaternary geologist at Peking University, obtained PhD from University of Cambridge. He first worked in the School of Environmental Sciences in the University of East Anglia, then the McDonald Institute for Archaeological Research, Department of Physics and Department of Earth Sciences of Cambridge University before he returned to Peking University in 1999. His research experience includes magnetostratigraphy and environmental magnetism of loess, luminescence dating of Quaternary deposits from terrestrial and marine environments as well as Paleolithic archaeological sites, and the applications of stable and radioactive isotopes in soils, atmosphere and seawater for Earth system change studies. He now serves as Co-Chair of the PAGES and Vice President of the Subcommission of Quaternary Stratigraphy of International Commission of Stratigraphy. He is Associate Editor of Radiation Measurements and Editor of Quaternary International.
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Conference Convenor |
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The new 3.0 MV Universal Accelerator Mass Spectrometer GANA at Guangxi Normal University Family Name: Shen Given Name: Hongtao Dr. Hongtao Shen, professor of Guangxi Normal University, China, and the director of the GNU-AMS Lab and the Guangxi Key Laboratory of Nuclear Physics and Technology, has been working on accelerator mass spectrometry (AMS) technology and its applications in geoscience, archaeology, biology, and environmental science since 2007. He is a member of the International Radiocarbon Academic Committee and the East Asia International AMS Academic Committee. He has received the Guangxi Outstanding Scholars Award, the Guangxi Science and Technology Award, and the Guangxi Youth Science & Technology Award for developing a novel AMS technique for the early diagnosis, prevention, and treatment of bone metastases in cancer patients. He is currently responsible for the construction of Guangxi’s first 3MV universal AMS facility (GANA).
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