scholarly journals AMS Radiocarbon Dating of Bones at LSCE

Radiocarbon ◽  
2003 ◽  
Vol 45 (3) ◽  
pp. 409-419 ◽  
Author(s):  
N Tisnérat-Laborde ◽  
H Valladas ◽  
E Kaltnecker ◽  
M Arnold
Keyword(s):  
Mass Spectrometry ◽  
Amino Acids ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Dating ◽  
Total System ◽  
Sample Mass ◽  
Specific Reaction ◽  
Ams Radiocarbon Dating ◽  
Carbon Sample

In this paper, we explain our routine pretreatment of bone for radiocarbon dating by accelerator mass spectrometry (AMS), based on the specific reaction between amino acids and ninhydrin described by Nelson (1991). The values and uncertainties of the total system background are presented as a function of the carbon sample mass and the reliability of this method is discussed.

scholarly journals 14C Wiggle-Matching of the B-Tm Tephra, Baitoushan Volcano, China/North Korea

Radiocarbon ◽  
2010 ◽  
Vol 52 (3) ◽  
pp. 933-940 ◽  
Author(s):  
Shinya Yatsuzuka ◽  
Mitsuru Okuno ◽  
Toshio Nakamura ◽  
Katsuhiko Kimura ◽  
Yohei Setoma ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
North Korea ◽  
Radiocarbon Dating ◽  
Gas Emission ◽  
Volcanic Gas ◽  
Ams Radiocarbon Dating ◽  
Eruption Age ◽  
The Difference ◽  
Volcanic Gas Emission

We performed accelerator mass spectrometry (AMS) radiocarbon dating and wiggle-matching of 2 wood samples from charred trunks of trees (samples A and B) collected from an ignimbrite deposit on the northeastern slope of the Baitoushan Volcano on the border of China and North Korea. The obtained calendar years for the eruption are cal AD 945–960 for sample A and cal AD 859–884 and cal AD 935–963 for sample B in the 2-σ range. These results are unable to determine the precise eruption age. The reason for the difference in reported ages may be due to volcanic gas emission prior to the huge eruption.

scholarly journals AMS Radiocarbon Dating of Tianma-Qucun Site in Shanxi, China

Radiocarbon ◽  
2001 ◽  
Vol 43 (2B) ◽  
pp. 1109-1114 ◽  
Author(s):  
Zhiyu Guo ◽  
Kexin Liu ◽  
Xiangyang Lu ◽  
Hongji Ma ◽  
Kun Li ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Bayesian Analysis ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Dating ◽  
Lower Boundary ◽  
Historical Record ◽  
Shanxi Province ◽  
Ams Radiocarbon Dating ◽  
Western Zhou ◽  
Calibration Program

Tianma-Qucun is the biggest site of Western Zhou Dynasty discovered in Shanxi Province, China. It has been recognized as the early capital of Jin, a vassal state of Western Zhou. The territories were granted to the first Marquis of Jin with the title in the early days of Western Zhou. Bone sample series from the site were radiocarbon-dated by accelerator mass spectrometry (AMS) and calibrated with the Oxford calibration program OxCal 3.5. Bayesian analysis of the calibrated ages shows that the earliest residents of the Western Zhou came to Tianma-Qucun area in 1020–940 BC and the lower boundary of the Western Zhou is 796–754 BC, which corresponds well to the historical record 770 BC.

scholarly journals AMS Radiocarbon Dating of Wood Samples from the Angkor Monuments, Cambodia

Radiocarbon ◽  
2008 ◽  
Vol 50 (3) ◽  
pp. 437-445 ◽  
Author(s):  
E Uchida ◽  
O Cunin ◽  
I Shimoda ◽  
Y Takubo ◽  
T Nakagawa
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Dating ◽  
Ams Radiocarbon Dating

In the Angkor monuments of Cambodia, pieces of wood remain (as head frames of doorways, crossbeams, ceiling boards, etc.) in the following 8 monuments: Bakong, Lolei, Baksei Chamkrong, North Khleang, Angkor Wat, Banteay Kdei, Bayon, and Gates of Angkor Thorn. Accelerator mass spectrometry (AMS) radiocarbon dating carried out on 15 wood samples collected from the above 8 monuments revealed that most of the wood samples are original, except for the head frame of a doorway in Baksei Chamkrong, the ceiling boards in the northwest tower, and a crossbeam with pivot hole in the southwest tower of the Inner Gallery of Angkor Wat. The 14C age for the head frame of a doorway in the inner wall under the central tower of North Khleang supports the hypothesis that the inner walls are additions from a later period.

scholarly journals 14C/12C Variations of Samples Exposed in Air According to Carbon Structure and Air Temperature

Radiocarbon ◽  
2013 ◽  
Vol 55 (2) ◽  
pp. 593-598
Author(s):  
J H Park ◽  
W Hong ◽  
G Park ◽  
K S Sung
Keyword(s):  
Mass Spectrometry ◽  
Carbon Nanotube ◽  
Air Temperature ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Dating ◽  
Pyrolytic Graphite ◽  
Carbon Structure ◽  
Graphite Sheet ◽  
Ams Radiocarbon Dating ◽  
Carbon Structures

Various carbon structures, including carbon nanofilament (CNF), single-wall carbon nanotube (SWCNT), multi-wall carbon nanotube (MWCNT), and pyrolytic graphite sheet (PGS), were exposed in air to determine how they vary according to carbon structure and air temperature. CNF is the carbon structure used in accelerator mass spectrometry (AMS) radiocarbon dating (Santos et al. 2007). When CNF and MWCNT were exposed in cold air (3 or −18 °C) for longer than 6 hr, their 14C/12C ratio increased (>5 × 10–14). When heated in an oven (200 or 250 °C) for longer than 12 hr, their 14C/12C ratio decreased. However, when SWCNT and PGS were exposed in air cooled to 3 °C for 12 hr, their 14C/12C ratio did not increase. This phenomenon is very curious, and is useful for the development of a storage method for carbon samples made by reduction reactions of CO2.

scholarly journals Comparison of Manual and Automated Pretreatment Methods for AMS Radiocarbon Dating of Plant Fossils

Radiocarbon ◽  
1994 ◽  
Vol 36 (3) ◽  
pp. 399-405 ◽  
Author(s):  
Lee-Ann Bradley ◽  
Thomas W. Stafford
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Traditional Method ◽  
Radiocarbon Dating ◽  
Automated System ◽  
Sample Material ◽  
Ams Radiocarbon Dating ◽  
Manual Method ◽  
Plant Fossils

A new automated pretreatment system for the preparation of materials submitted for accelerator mass spectrometry (AMS) analysis is less time-consuming and results in a higher sample yield. The new procedure was tested using two groups of plant fossils: one group was pretreated using the traditional method, and the second, using the automated pretreatment apparatus. We compared the time it took to complete the procedure and the amount of sample material remaining. The automated pretreatment apparatus proved to be more than three times faster and, in most cases, produced a higher yield. We also observed a darker discoloration of the KOH solutions, indicating that the automated system is more thorough in removing humates from the specimen compared to the manual method.

scholarly journals AMS Radiocarbon Dating of a Shell Fishhook from Santa Rosa Island, California

Radiocarbon ◽  
2001 ◽  
Vol 43 (1) ◽  
pp. 83-86 ◽  
Author(s):  
Torben C Rick
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Dating ◽  
Ams Radiocarbon Dating ◽  
Single Piece ◽  
Santa Rosa Island

Several single-piece shell fishhooks from CA-SRI-43 on Santa Rosa Island were dated by association to roughly 5500 cal BP and were argued to be among the oldest specimens in the region. Direct accelerator mass spectrometry (AMS) radiocarbon dating of one of these hooks provided a date of 560 cal BP, however, making it about 5000 yr younger than originally presumed. This younger date is more consistent with the regional shell fishhook chronology and demonstrates the importance of obtaining direct AMS 14C dates to refine artifact and site chronologies.

AMS Radiocarbon Dating of Preclassic Maya Burials at Cuello, Belize

1991 ◽  
Vol 56 (3) ◽  
pp. 514-519 ◽  
Author(s):  
Rupert A. Housley ◽  
Norman Hammond ◽  
Ian A. Law
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Dating ◽  
Human Bone ◽  
Ams Radiocarbon Dating ◽  
Preclassic Maya

The use of accelerator mass spectrometry (AMS) on human bone from early Maya burials at Cuello, Belize provides direct dating of the Preclassic population, and assists resolution of the chronological problems discussed by Andrews and Hammond (1990).

INTER-UNIVERSITY ACCELERATOR CENTRE, NEW DELHI (IUACD) RADIOCARBON DATE LIST I

Radiocarbon ◽  
2020 ◽  
Vol 62 (5) ◽  
pp. e1-e13
Author(s):  
Rajveer Sharma ◽  
Pankaj Kumar ◽  
Sunil Ojha ◽  
Satinath Gargari ◽  
Sundeep Chopra
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Dating ◽  
Background Level ◽  
New Delhi ◽  
Handling System ◽  
Carbon Sample ◽  
New Facility ◽  
Pelletron Accelerator ◽  
Better Than

ABSTRACTA new facility for radiocarbon dating by accelerator mass spectrometry (AMS) was established in early 2015 at the Inter-University Accelerator Centre in New Delhi, India. The facility uses a 500 kV National Electrostatic Corporation (NEC) Pelletron accelerator for AMS measurements on graphite produced using the automated graphitization equipment (AGE) interfaced with an elemental analyzer and the carbonate handling system (CHS). A precision of better than 1‰ in the ratio of 14C/12C for the modern carbon sample and the background level of 1 × 10–15 from dead carbon sample has been achieved. This is the first dedicated accelerator of India only for AMS activities. This AMS system has the capabilities to perform 10Be and 26Al measurements as well.

The Copper Age Mound Necropolis in Salve, Lecce, Italy: Radiocarbon Dating Results on Charcoals, Bones, Cremated Bones, and Pottery

Radiocarbon ◽  
2014 ◽  
Vol 56 (3) ◽  
pp. 949-957 ◽  
Author(s):  
Gianluca Quarta ◽  
Ida Tiberi ◽  
Marco Rossi ◽  
Giorgia Aprile ◽  
Eugenia Braione ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Accelerator Mass Spectrometry ◽  
Radiocarbon Dating ◽  
Southern Italy ◽  
Copper Age ◽  
Organic Residues ◽  
Ams Radiocarbon Dating ◽  
Funeral Practices ◽  
Pottery Sherds

Archaeological surface surveys carried out near Salve in southern Italy led to the identification of about 90 stone mounds spread over an area of about 100 ha. Systematic archaeological investigations allowed to identify the mounds as funeral structures with some having megalithic features. In the necropolis, both the inhumation and cremation rituals are evident, in some cases within the same mound. This article presents the results of an accelerator mass spectrometry (AMS) radiocarbon dating campaign carried out on different kinds of samples recovered from several structures: unburned and cremated bones, charcoals, and organic residues extracted from pottery sherds. The results allowed to assess the chronology of the site and to shed new light on the different funeral practices in Copper Age southern Italy.

scholarly journals Age of the Younger Laxá Lava and Lake Mývatn, Northern Iceland, Determined by AMS Radiocarbon Dating

Radiocarbon ◽  
2012 ◽  
Vol 54 (02) ◽  
pp. 155-164 ◽  
Author(s):  
Ulf Hauptfleisch ◽  
Árni Einarsson
Keyword(s):  
Mass Spectrometry ◽  
Lava Flow ◽  
Accelerator Mass Spectrometry ◽  
Age Estimation ◽  
Radiocarbon Dating ◽  
Ams Radiocarbon Dating ◽  
Lake Mývatn

Lake Mývatn and several smaller lakes in northern Iceland were formed by the large Holocene lava flow of the Younger Laxá Lava (YLL). The age of the YLL was estimated by tephrochronology at 1800–2300 BP (Thorarinsson 1951). Conventional radiocarbon dating of charred vegetation beneath the YLL (Thorarinsson 1964) yielded uncalibrated ages of 1940 ± 27014C yr BP (Yale), 2110 ± 14014C yr BP (Copenhagen), and 1990 ± 5014C yr BP (Winnipeg). Ongoing palcolimnological research at Lake Mývatn requires a more precise age estimation of the YLL. Charcoal samples from beneath the YLL were collected at Presthvammur in 2007 and analyzed by accelerator mass spectrometry (AMS)14C measurements. The reliability of the conventional14C ages of the samples Yale, Copenhagen, and Winnipeg was re-evaluated, applying criteria from Pettit et al. (2003) and Graf (2009). The result of AMS14C measurement (2170 ± 38 cal yr BP) underpins the local tephrochronology and provides a reliable age of the YLL and Lake Mývatn.

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