An update on in situ cosmogenic 14C analysis at ETH Zurich

被引：31
作者：
Hippe, K. [1 ]
Kober, F. [2 ]
Wacker, L. [3 ]
Fahrni, S. M. [3 ,4 ]
Ivy-Ochs, S. [3 ]
Akcar, N. [5 ]
Schluechter, C. [5 ]
Wieler, R. [1 ]
机构：
[1] ETH, Inst Geochem & Petrol, CH-8092 Zurich, Switzerland
[2] ETH, Inst Geol, CH-8092 Zurich, Switzerland
[3] ETH, Inst Particle Phys, CH-8093 Zurich, Switzerland
[4] Univ Bern, Dept Chem & Biochem, CH-3012 Bern, Switzerland
[5] Univ Bern, Inst Geol Sci, CH-3012 Bern, Switzerland
来源：
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS | 2013年 / 294卷
关键词：
In situ C-14; Cosmogenic nuclide; Data reduction; GLACIER; EROSION; MICADAS; COMPLEX; BE-10; RATES; RATIO;
D O I：
10.1016/j.nimb.2012.06.020
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
We present the improved performance of the modified in situ cosmogenic C-14 extraction system at ETH Zurich. Samples are now processed faster (2 days in total) and are measured with a high analytical precision of usually <2% using the gas ion source of the MICADAS AMS facility. Measurements of the PP-4 standard sample show a good reproducibility and consistency with published values. Procedural blanks are very low at currently similar to 4.0 x 10(4) C-14 atoms. Analyses of samples from a similar to 300 y old rock avalanche prove that we can successfully apply in situ C-14 exposure dating to very young surfaces. Additionally, we present a modified calculation scheme for in situ C-14 concentrations which differs from that used for conventional radiocarbon dating. This new approach explicitly accounts for the characteristics of in situ C-14 production. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：81 / 86
页数：6
相关论文
共 24 条
  • [1] ISOTOPIC STANDARDS FOR CARBON AND OXYGEN AND CORRECTION FACTORS FOR MASS-SPECTROMETRIC ANALYSIS OF CARBON DIOXIDE
    CRAIG, H
    [J]. GEOCHIMICA ET COSMOCHIMICA ACTA, 1957, 12 (1-2) : 133 - 149
  • [2] Rock avalanches on a glacier and morainic complex in Haut Val Ferret (Mont Blanc Massif, Italy)
    Deline, Philip
    Kirkbride, Martin P.
    [J]. GEOMORPHOLOGY, 2009, 103 (01) : 80 - 92
  • [3] ISOTOPE-RATIO AND BACKGROUND CORRECTIONS FOR ACCELERATOR MASS-SPECTROMETRY RADIOCARBON MEASUREMENTS
    DONAHUE, DJ
    LINICK, TW
    JULL, AJT
    [J]. RADIOCARBON, 1990, 32 (02) : 135 - 142
  • [4] Dugan B, 2008, GEOCHIM COSMOCHIM AC, V72, pA231
  • [5] Scaling factors for the rates of production of cosmogenic nuclides for geometric shielding and attenuation at depth on sloped surfaces
    Dunne, J
    Elmore, D
    Muzikar, P
    [J]. GEOMORPHOLOGY, 1999, 27 (1-2) : 3 - 11
  • [6] Fülöp RH, 2010, RADIOCARBON, V52, P1288
  • [7] The Rhone Glacier was smaller than today for most of the Holocene
    Goehring, Brent M.
    Schaefer, Joerg M.
    Schluechter, Christian
    Lifton, Nathaniel A.
    Finkel, Robert C.
    Jull, A. J. Timothy
    Akcar, Naki
    Alley, Richard B.
    [J]. GEOLOGY, 2011, 39 (07) : 679 - 682
  • [8] Gonfiantini R., 1995, REFERENCE INTERCOMPA, P13, DOI DOI 10.1029/2001JD001156
  • [9] Production of selected cosmogenic radionuclides by muons 1. Fast muons
    Heisinger, B
    Lal, D
    Jull, AJT
    Kubik, P
    Ivy-Ochs, S
    Neumaier, S
    Knie, K
    Lazarev, V
    Nolte, E
    [J]. EARTH AND PLANETARY SCIENCE LETTERS, 2002, 200 (3-4) : 345 - 355
  • [10] The current performance of the in situ 14C extraction line at ETH
    Hippe, Kristina
    Kober, Florian
    Baur, Heinrich
    Ruff, Matthias
    Wacker, Lukas
    Wieler, Rainer
    [J]. QUATERNARY GEOCHRONOLOGY, 2009, 4 (06) : 493 - 500
123