81kr Dating

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Radiometric 81Kr dating identifies 120,000-year-old ice at . . .
Radiometric 81Kr dating identifies 120,000-year-old ice at . . .
An atom trap system for practical 81Kr dating: Review of . . .
81Kr Dating at the Guliya Ice Cap, Tibetan Plateau - Tian . . .
81Kr Dating at the Guliya Ice Cap, Tibetan Plateau - Tian . . .
^81Kr-dating with an MOT - NASA/ADS
PDF Radiometric 81Kr dating identifies 120,000-year-old ice at . . .
Primer on Atom Trap Trace Analysis 85Kr 39Ar 81Kr Dating
81Kr 85Kr 39Ar Atom Trap Trace Analysis | Laboratory for . . .
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Past variations in Earth's climate and atmospheric composition are recorded in accumulating polar meteoric ice and the air trapped within it . Ice outcrops provide accessible archives of old ice but are difficult to date reliably . Here we demonstrate 81Kr radiometric dating of ice, allowing accurate dating of up to 1 .5 million-year-old ice . The technique successfully identifies valuable ice . . .
1 . Proc Natl Acad Sci U S A . 2014 May 13;111(19):6876-81 . doi: 10 .1073/pnas .1320329111 . Epub 2014 Apr 21 . Radiometric 81Kr dating identifies 120,000-year-old ice at Taylor Glacier, Antarctica .
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 range of 50,000 years to 1 million years . Here, we describe . . .
Radiometric 81Kr dating of bottom ice from the Guliya ice cap is presented 81Kr data yield upper age limits in the range of 15-74 ka 81Kr results are difficult to reconcile with ages previously obt . . .
Radiometric 81Kr dating of bottom ice from the Guliya ice cap is presented 81Kr data yield upper age limits in the range of 15-74 ka 81Kr results are difficult to reconcile with ages previously obt . . .
^ 81Kr (230 kyr, isotopic abundance 5x10 -13 ) is a long-lived cosmogenic isotope, ideal for dating old groundwater and ice in the range of 50,000 years to a million years . Due to the extremely low isotopic abundance of ^ 81Kr ( ̃ 1000 ^ 81Kr atoms are contained in 1 liter of modern ice or groundwater), analysis of ^ 81Kr at or below the atmospheric isotopic abundance has been an experimental . . .
Radiometric 81Kr dating identifies 120,000-year-old ice at Taylor Glacier, Antarctica Christo Buizerta,1, Daniel Baggenstosb, Wei Jiangc, Roland Purtschertd, Vasilii V . Petrenkoe, Zheng-Tian Luc,f, Peter Müllerc, Tanner Kuhlg, James Leea, Jeffrey P . Severinghausb, and Edward J . Brooka aCollege of Earth, Ocean and Atmospheric Sciences, Oregon State University, Corvallis, OR 97331; bScripps . . .
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A Primer on Atom Trap Trace Analysis (ATTA) For colleagues who wish to apply radio-krypton or radio-argon dating . Atom Trap Trace Analysis (ATTA) is a laser-based atom-counting method capable of analyzing environmental isotope tracers 85 Kr, 39 Ar, and 81 Kr, each covering a distinct age range around the respective half-life (Table 1) . Combined with 14 C, the tracers can be used to probe . . .
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 39Ar, covering a wide range of ages and applications in dating water and ice samples .
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