81KR

Radiometric 81Kr dating identifies 120,000-year-old ice at Taylor ...

21 Apr 2014 ... We present successful 81Kr-Kr radiometric dating of ancient polar ice. Krypton was extracted from the air bubbles in four ∼350-kg polar ice ...

81kr

Setting a Limit on Anthropogenic Sources of Atmospheric 81Kr ...

6 Feb 2019 ... In recent years, 81Kr-dating has been made available to the earth ... of 1% and place this new limit on anthropogenic 81Kr. As a result of this ...

81kr

Using 81Kr and noble gases to characterize and date groundwater ...

15 May 2019 ... Analyses for 81Kr and noble gases on groundwater from the deepest aquifer system of the Baltic Artesian Basin (BAB) were performed to ...

81kr

Radiative electron capture in the first forbidden unique decay of 81Kr

11 Aug 2010 ... Abstract: The photon spectrum accompanying the orbital K-electron capture in the first forbidden unique decay of 81Kr was measured. The total ...

81kr

Isotopes of krypton - Wikipedia

81Kr, trace, 2.3×105 y, ε, Br. γ, –. 82Kr, 11.59%, stable. 83Kr, 11.50%, stable. 84 Kr, 56.99%, stable. Kr, syn, 11 y, β · Rb. 86Kr, 17.28%, stable. Standard atomic weight Ar, standard(Kr). 83.798(2). view · talk · edit. There are 33 known isotopes of krypton (36Kr) with atomic mass numbers from 69 through 101.

81kr

(PDF) A New Method of Measuring 81Kr and 85Kr Abundances in ...

PDF | We demonstrate a new method for determining the 81Kr/Kr ratio in environmental samples based upon two measurements: the 85Kr/81Kr ratio measured.

81kr

Counting 39Ar, 81Kr and 85Kr at and below natural level for tracer ...

39Ar, 81Kr, 85Kr, Low Level Counting, Accelerator Mass Spectrometry, Atom Trap Trace. Analysis. Abstract. Trace analysis of radionuclides is an essential and ...

81kr

Noble Gas Radioisotopes: 37Ar, 85Kr, 39Ar, 81Kr | SpringerLink

Four nuclides exist that have been measured in groundwater: 37Ar (half-life 35 days), 85Kr (half-life 10.76 years), 39Ar (half-life 269 years) and 81Kr (half-life ...

81kr

81Kr dating – A tool for finding and studying paleogroundwater ...

1 University of Science and Technology of China, Hefei, 230026, China 2 Center for Excellence in Quantum Information and Quantum Physics, CAS, Hefei, ...

81kr

Radiometric 81Kr dating identifies 120,000-year-old ice at Taylor ...

1. Proc Natl Acad Sci U S A. 2014 May 13;111(19):6876-81. doi: 10.1073/pnas. 1320329111. Epub 2014 Apr 21.

81kr

81Kr Dating at the Guliya Ice Cap, Tibetan Plateau - Tian - 2019 ...

29 May 2019 ... Abstract We present radiometric 81Kr dating results for ice samples collected at the outlets of the Guliya ice cap in the western Kunlun ...

81kr

Revealing old ice with 81Kr

Revealing old ice with 81Kr. Florian Ritterbusch (1), Yan-qing Chu (1), Ilaria Crotti (2), Xi-ze Dong (1), Shui-ming Hu (1), Ji-qiang Gu (1),. Wei Jiang (1), Amaelle ...

81kr

Atmospheric 81Kr as an Integrator of Cosmic‐Ray Flux on the ...

21 Jan 2020 ... Abstract The atmospheric abundance of 81Kr is a global integrator of cosmic rays . It is insensitive to climate shifts, geographical variations, and ...

81kr

81Kr-Kr COSMIC RAY EXPOSURE AGE OF THE PUERTO LAPICE ...

basis of 81Kr-Kr exposure age dating [7]. The production rate of krypton isotopes depends on both chemistry and cosmic ray flux, but after several half lives the ...

81kr

An atom trap system for practical 81Kr dating: Review of Scientific ...

20 Sep 2004 ... 81Kr (t1/2=2.3×105 yr, 81Kr/Kr∼6×10−13) is a long-lived cosmogenic isotope, which is ideal for dating old groundwater and ice in the age ...

81kr

Noble gases and 81Kr-Kr exposure ages of non-Antarctic ordinary ...

For Long Island and Densmore, the 81Kr-Kr ages are 16±2 Ma and 7.7±0.5 Ma, respectively, and are in agreement with the ages by 21Ne and 83I(~~, which ...

81kr

81 Kr Radiation Ages of Stone Meteorites Impact Craters and the ...

Marti1 and Eugster et al. (ref. 2 and unpublished work) recently discovered 81Kr, the first cosmic ray produced radionuclide heavier than the Ni-Fe group, ...

81kr

Radiometric 81Kr dating identifies 120,000-year-old ice at Taylor ...

21 Apr 2014 ... Radiometric 81Kr dating identifies 120,000-year-old ice at Taylor Glacier, Antarctica. Christo Buizert, Daniel Baggenstos, Wei Jiang, Roland ...

81kr

81Kr‐Kr cosmic ray exposure ages of individual chondrules from ...

14 Dec 2013 ... Abstract 81Kr‐Kr cosmic ray exposure (CRE) ages of individual chondrules (6– 10 mg) and adjacent matrix samples (5–10 mg) from the Allegan ...

81kr

Hyperfine spectroscopy of 81Kr and 85Kr - OSA

Abstract. Hyperfine constants and isotope shifts were measured for the 1s5-2p9) and 1s5-4d4 transitions in 81Kr and for the 1s5--2p9, 1s5-2p7, and ls5-2P0, ...

81kr

Cosmogenic radionuclides in ordinary chondrite falls selected for ...

The 81Kr-Kr exposure age method is based on the combination of stable Kr isotopes, mainly 78Kr, 80Kr, 82Kr, 83Kr, which increase linearly with increasing ...

81kr

81Kr 85Kr 39Ar Atom Trap Trace Analysis | Laboratory for Radio ...

Atom Trap Trace Analysis, a laser-based atom counting method developed at Argonne, can now be used to analyze the long-lived isotopes 81Kr, 85Kr, and ...

81kr

New Measurements of the 81Kr Atmospheric Abundance | Kuzminov ...

We have determined the 81Kr activity to be (0.067 ± 0.003) decay/min. 1 krypton. Using this activity in conjunction with our new measurement of the 80 KR(n ...

81kr

Noble gases and 81Kr-Kr exposure ages of non ... - CiNii 論文

Cosmogenic ^<81>Kr as well as other noble gases of three ordinary chondrites Long Island (L6), Densmore (1950) (H6), and Gladstone (stone) (H6) have been  ...

81kr

GeoSphere | ATTA and the Curious Case of Krypton-81

14 Sep 2019 ... 81Kr has long been a bit of a dangling carrot for groundwater dating people like myself. 81Kr is a long lived radioisotope of Kr (half-life: 229,000 ...

81kr

Primer on Atom Trap Trace Analysis 85Kr 39Ar 81Kr Dating

Atom Trap Trace Analysis (ATTA) is a laser-based atom-counting method capable of analyzing environmental isotope tracers 85Kr, 39Ar, and 81Kr, each ...

81kr

A method of detecting the rare isotopes 85Kr and 81Kr by means of ...

A method of detecting the rare isotopes 85Kr and 81Kr by means of collinear laser photoionization of atoms in an accelerated beam. S A Aseyev, Y A ...

81kr

KRYPTON KR-81M | 81Kr | ChemSpider

Structure, properties, spectra, suppliers and links for: KRYPTON KR-81M, 15678- 91-8.

81kr

81Kr Dating at the Guliya Ice Cap, Tibetan Plateau

19 Jun 2019 ... Abstract We present radiometric 81Kr dating results for ice samples collected at ... extremely rare krypton isotope 81Kr. Eight ice samples were ...

81kr

NOBLE GASES AND 81Kr-Kr EXPOSURE AGES OF NON ...

Abstract: Cosmogenic 81Kr as well as other noble gases of three ordinary ... of 81 Kr in meteorites, < 10-13 cm3STP / g, makes its accurate measurement difficult ...

81kr

A New Method of Measuring 81Kr and 85Kr Abundances in ...

81Kr/Kr ratio in environmental samples based upon two measurements: the 85Kr/ 81Kr ratio measured by Atom Trap. Trace Analysis (ATTA) and the 85Kr/Kr ratio ...

81kr

81Kr-Kr COSMIC RAY EXPOSURE AGE OF AN INDI- VIDUAL ...

81Kr-Kr COSMIC RAY EXPOSURE AGE OF AN INDI-. VIDUAL ALLENDE CAI. M. Nottingham1, I. Strashnov1,2, J. D. Gilmour1, J. T. Wasson3,. A. E. Rubin3.

81kr

Measurement of the Long-lived Radionuclide 81Kr in Pre-nuclear ...

Radiochimica Acta. International Journal for chemical aspects of nuclear science and technology. Editor-in-Chief: Qaim, Syed M. IMPACT FACTOR 2019: 1.339

81kr

Determining the absolute abundance of atmospheric 81Kr

Determining the absolute abundance of atmospheric 81Kr. J. C. ZAPPALA. 1*, D. BAGGENSTOS. 2, M. BISHOF. 1, C. GERBER. 2, W. JIANG. 3, B. M. KENNEDY.

81kr

Gerber, Christoph: Using 81Kr and noble gases to ... - HEIDI

Titel: Using 81Kr and noble gases to characterize and date groundwater and brines in the Baltic Artesian Basin on the one-million-year timescale. Verf.angabe  ...

81kr

Electron capture ratios of forbidden transitions in the decay of ...

Electron capture ratios of forbidden transitions in the decay of [superscript]81KR and [superscript]59NI. Thumbnail. View/Open.

81kr

81Kr IN THE GREAT ARTESIAN BASIN, AUSTRALIA: A NEW ...

atmosphere (2) the radioactive noble gas isotope 81Kr was considered to be ... Given a krypton mixing ratio of 1.14 ppmv in the atmosphere and a 81Kr/Kr ratio.

81kr

37Ar and 81Kr in the atmosphere - Semantic Scholar

Semantic Scholar extracted view of "37Ar and 81Kr in the atmosphere" by Heinz Hugo Loosli et al.

81kr

ABG Stretch Tape 2.0 - 5-pack (81kr/roll) - Burpee Shop

The ABG Stretch Tape is manufactured by weaving a specific number or horizontal and vertical threads of elastic into a cotton cloth that gives the best feel whil.

81kr

A new capability in isotope geochemistry — Arizona State University

22 Oct 2012 ... Their principal applications include determination of groundwater residence times ( 81Kr, 85Kr, and 39Ar) and seawater ventilation ages ...

81kr

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