Hans‐arno Synal
Dados Biográficos
| ID | 4455737 |
|---|---|
| NOME | Hans‐arno Synal |
| PRENOMES | Hans‐arno |
| SOBRENOME | Synal |
| ASSINATURA | SYNAL H A |
| AFILIAÇÕES | Paul Scherrer Institute |
| ORCID | 0000-0001-5621-3089 |
| VERIFICADO | Sim |
| TOTAL DE OBRAS | 10 |
| TOTAL DE CITAÇÕES | 28 |
| TOTAL COMO AUTOR | 10 |
| TOTAL COMO EDITOR | 0 |
| PRIMEIRO ANO DE PUBLICAÇÃO | 1997 |
| ANO MAIS RECENTE DE PUBLICAÇÃO | 2024 |
| ÍNDICE H | 2 |
Lea—a Novel Low Energy Accelerator for 14 C Dating
A newly developed compact AMS, LEA (Low Energy Accelerator), is tested and compared with a state-of-the-art AMS system MICADAS (Mini Carbon Dating System), which has a precision performance of better than 1‰ for modern 14 C. The main difference between these two systems is the acceleration voltage, which has been reduced from 200 kV with the MICADAS system to 50 kV with the LEA system. In order to execute the final performance tests, exactly same…
Willy Wölfli (1930–2014)
Looking back on Willy Wlfli's scientific achievements is not an easy task. However, to fully understand his remarkable contributions to AMS, one has to begin with a look at his professional career. Influenced by the worldwide crises of the 1930s and 1940s, which also left their mark on Switzerland, Willy Wlfli
Advances and limitations of 14C dating in the field of heritage sciences
In heritage sciences, the ability to obtain information about the origin and dating of cultural heritage objects is fundamental for placing an object into its historical context. Radiocarbon (14C) dating can help to identify the period during which a work of art was created by dating its constitutive materials. Such information can, however, only be obtained by removing a sample from the object, which is critical since art is irreplaceable and de…
Online 13 C and 14 C Gas Measurements by EA-IRMS–AMS at ETH Zürich
Studies using carbon isotopes to understand the global carbon cycle are critical to identify and quantify sources, sinks, and processes and how humans may impact them. 13 C and 14 C are routinely measured individually; however, there is a need to develop instrumentation that can perform concurrent online analyses that can generate rich data sets conveniently and efficiently. To satisfy these requirements, we coupled an elemental analyzer to a sta…
C Contamination Testing in Natural Abundance Laboratories
Substances enriched with radiocarbon can easily contaminate samples and laboratories used for natural abundance measurements. We have developed a new method using wet chemical oxidation for swabbing laboratories and equipment to test for 14 C contamination. Here, we report the findings of 18 months’ work and more than 800 tests covering studies at multiple locations. Evidence of past and current use of enriched 14 C was found at all but one locat…
C Analysis and Sample Preparation at the New Bern Laboratory for the Analysis of Radiocarbon with AMS (Lara)
The University of Bern has set up the new Laboratory for the Analysis of Radiocarbon with AMS (LARA) equipped with an accelerator mass spectrometer (AMS) MICADAS (MIni CArbon Dating System) to continue its long history of 14 C analysis based on conventional counting. The new laboratory is designated to provide routine 14 C dating for archaeology, climate research, and other disciplines at the University of Bern and to develop new analytical syste…
Mams – A new AMS facility at the Curt-Engelhorn-Centre for Achaeometry, Mannheim, Germany
A Simple Way to Upgrade a Compact Radiocarbon AMS Facility for 10 Be
A simple way to upgrade the Peking University 500kV NEC radiocarbon facility (CAMS) for 10 Be measurements is presented. In a first phase, a silicon nitride foil as passive boron degrader was mounted in front of the electrostatic deflector near the focal plane of 10 Be. The Si detector at the end of the beam line was replaced with a high-resolution ΔE-E res gas ionization chamber. In addition, a Faraday cup for the measurement of 9 Be 1+ was inst…
Micadas
Tropical Climate Instability
An ice core record from the Guliya ice cap on the Qinghai-Tibetan Plateau provides evidence of regional climatic conditions over the last glacial cycle. 36 Cl data suggest that the deepest 20 meters of the core may be more than 500,000 years old. The δ 18 O change across Termination I is ∼5.4 per mil, similar to that in the Huascarán (Peru) and polar ice cores. Three Guliya interstadials (Stages 3, 5a, and 5c) are marked by increases in δ 18 O va…
C Analysis and Sample Preparation at the New Bern Laboratory for the Analysis of Radiocarbon with AMS (Lara)
The University of Bern has set up the new Laboratory for the Analysis of Radiocarbon with AMS (LARA) equipped with an accelerator mass spectrometer (AMS) MICADAS (MIni CArbon Dating System) to continue its long history of 14 C analysis based on conventional counting. The new laboratory is designated to provide routine 14 C dating for archaeology, climate research, and other disciplines at the University of Bern and to develop new analytical syste…
Online 13 C and 14 C Gas Measurements by EA-IRMS–AMS at ETH Zürich
Studies using carbon isotopes to understand the global carbon cycle are critical to identify and quantify sources, sinks, and processes and how humans may impact them. 13 C and 14 C are routinely measured individually; however, there is a need to develop instrumentation that can perform concurrent online analyses that can generate rich data sets conveniently and efficiently. To satisfy these requirements, we coupled an elemental analyzer to a sta…
C Contamination Testing in Natural Abundance Laboratories
Substances enriched with radiocarbon can easily contaminate samples and laboratories used for natural abundance measurements. We have developed a new method using wet chemical oxidation for swabbing laboratories and equipment to test for 14 C contamination. Here, we report the findings of 18 months’ work and more than 800 tests covering studies at multiple locations. Evidence of past and current use of enriched 14 C was found at all but one locat…
Lea—a Novel Low Energy Accelerator for 14 C Dating
A newly developed compact AMS, LEA (Low Energy Accelerator), is tested and compared with a state-of-the-art AMS system MICADAS (Mini Carbon Dating System), which has a precision performance of better than 1‰ for modern 14 C. The main difference between these two systems is the acceleration voltage, which has been reduced from 200 kV with the MICADAS system to 50 kV with the LEA system. In order to execute the final performance tests, exactly same…
Willy Wölfli (1930–2014)
Looking back on Willy Wlfli's scientific achievements is not an easy task. However, to fully understand his remarkable contributions to AMS, one has to begin with a look at his professional career. Influenced by the worldwide crises of the 1930s and 1940s, which also left their mark on Switzerland, Willy Wlfli
Tropical Climate Instability
An ice core record from the Guliya ice cap on the Qinghai-Tibetan Plateau provides evidence of regional climatic conditions over the last glacial cycle. 36 Cl data suggest that the deepest 20 meters of the core may be more than 500,000 years old. The δ 18 O change across Termination I is ∼5.4 per mil, similar to that in the Huascarán (Peru) and polar ice cores. Three Guliya interstadials (Stages 3, 5a, and 5c) are marked by increases in δ 18 O va…
Micadas
Mams – A new AMS facility at the Curt-Engelhorn-Centre for Achaeometry, Mannheim, Germany
A Simple Way to Upgrade a Compact Radiocarbon AMS Facility for 10 Be
A simple way to upgrade the Peking University 500kV NEC radiocarbon facility (CAMS) for 10 Be measurements is presented. In a first phase, a silicon nitride foil as passive boron degrader was mounted in front of the electrostatic deflector near the focal plane of 10 Be. The Si detector at the end of the beam line was replaced with a high-resolution ΔE-E res gas ionization chamber. In addition, a Faraday cup for the measurement of 9 Be 1+ was inst…
C Analysis and Sample Preparation at the New Bern Laboratory for the Analysis of Radiocarbon with AMS (Lara)
The University of Bern has set up the new Laboratory for the Analysis of Radiocarbon with AMS (LARA) equipped with an accelerator mass spectrometer (AMS) MICADAS (MIni CArbon Dating System) to continue its long history of 14 C analysis based on conventional counting. The new laboratory is designated to provide routine 14 C dating for archaeology, climate research, and other disciplines at the University of Bern and to develop new analytical syste…
C Contamination Testing in Natural Abundance Laboratories
Substances enriched with radiocarbon can easily contaminate samples and laboratories used for natural abundance measurements. We have developed a new method using wet chemical oxidation for swabbing laboratories and equipment to test for 14 C contamination. Here, we report the findings of 18 months’ work and more than 800 tests covering studies at multiple locations. Evidence of past and current use of enriched 14 C was found at all but one locat…
Online 13 C and 14 C Gas Measurements by EA-IRMS–AMS at ETH Zürich
Studies using carbon isotopes to understand the global carbon cycle are critical to identify and quantify sources, sinks, and processes and how humans may impact them. 13 C and 14 C are routinely measured individually; however, there is a need to develop instrumentation that can perform concurrent online analyses that can generate rich data sets conveniently and efficiently. To satisfy these requirements, we coupled an elemental analyzer to a sta…
Advances and limitations of 14C dating in the field of heritage sciences
In heritage sciences, the ability to obtain information about the origin and dating of cultural heritage objects is fundamental for placing an object into its historical context. Radiocarbon (14C) dating can help to identify the period during which a work of art was created by dating its constitutive materials. Such information can, however, only be obtained by removing a sample from the object, which is critical since art is irreplaceable and de…
Willy Wölfli (1930–2014)
Looking back on Willy Wlfli's scientific achievements is not an easy task. However, to fully understand his remarkable contributions to AMS, one has to begin with a look at his professional career. Influenced by the worldwide crises of the 1930s and 1940s, which also left their mark on Switzerland, Willy Wlfli
Lea—a Novel Low Energy Accelerator for 14 C Dating
A newly developed compact AMS, LEA (Low Energy Accelerator), is tested and compared with a state-of-the-art AMS system MICADAS (Mini Carbon Dating System), which has a precision performance of better than 1‰ for modern 14 C. The main difference between these two systems is the acceleration voltage, which has been reduced from 200 kV with the MICADAS system to 50 kV with the LEA system. In order to execute the final performance tests, exactly same…
Computer Science (5 obras) · Nuclear physics (5 obras) · Physics (5 obras) · Accelerator mass spectrometry (4 obras) · Archaeology and ancient environmental studies (4 obras) · Chemistry (4 obras) · Engineering (4 obras) · Geology and Paleoclimatology Research (4 obras) · Isotope Analysis in Ecology (4 obras) · Radiocarbon dating (4 obras)