Results 21 to 30 of about 60,862 (368)

Operation Analysis of PandaX-4T Ultra-High Purity Xenon Cryogenic Distillation System for Removal of Krypton

open access: yesShanghai Jiaotong Daxue xuebao, 2021
Based on the McCabe-Thiele (M-T) method and the conservation of mass and energy, the PandaX-4T collaboration group designs an efficient cryogenic distillation system to reduce the mole fraction of krypton in commercial xenon from 5×10-7 to 1 ...
YAN Rui, WANG Zhou, CUI Xiangyi, JU Yonglin, SHA Haidong, LI Shuaijie, HUANG Peiyao, WANG Xiuli
doaj   +1 more source

On the interference of Kr during carbon isotope analysis of methane using continuous-flow combustion–isotope ratio mass spectrometry [PDF]

open access: yesAtmospheric Measurement Techniques, 2013
Stable carbon isotope analysis of methane (δ13C of CH4) on atmospheric samples is one key method to constrain the current and past atmospheric CH4 budget.
J. Schmitt   +9 more
doaj   +1 more source

Krypton isotopes and noble gas abundances in the coma of comet 67P/Churyumov-Gerasimenko [PDF]

open access: yesScience Advances, 2018
Noble gases in comet 67P/Churyumov-Gerasimenko indicate nonhomogenized protoplanetary disk material at its location of formation. The Rosetta Orbiter Spectrometer for Ion and Neutral Analysis mass spectrometer Double Focusing Mass Spectrometer on board ...
M. Rubin   +26 more
semanticscholar   +1 more source

The possibility for gamma and UV radiation detection based on electrical breakdown time delay measurement in krypton and xenon filled diodes [PDF]

open access: yesNuclear Technology and Radiation Protection, 2021
The paper presents results of electrical breakdown time delay mean value t¯d as a function of relaxation time τ (memory curve) for krypton and xenon-filled diodes at 270 Pa pressure.
Pejović Milić M.   +2 more
doaj   +1 more source

Multiple Sequential Ionization of Valence n = 4 Shell of Krypton by Intense Femtosecond XUV Pulses

open access: yesAtoms, 2020
Sequential photoionization of krypton by intense extreme ultraviolet femtosecond pulses is studied theoretically for the photon energies below the 3d excitation threshold.
Elena V. Gryzlova   +5 more
doaj   +1 more source

Identification of chondritic krypton and xenon in Yellowstone gases and the timing of terrestrial volatile accretion

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2020
Significance Volatile elements play a critical role in the evolution of Earth. Nevertheless, the mechanism(s) by which Earth acquired, and was able to preserve its volatile budget throughout its violent accretionary history, remains uncertain.
M. Broadley   +6 more
semanticscholar   +1 more source

Runaway electrons during subnanosecond breakdowns in high-pressure gases

open access: yesHigh Voltage, 2016
The parameters of runaway electrons produced in nanosecond high-voltage discharges in different gases (air, nitrogen, sulphur hexafluoride, krypton, argon, methane, neon, hydrogen, helium) at atmospheric and higher pressure were studied.
Victor F. Tarasenko   +3 more
doaj   +1 more source

Pore Size Control via Multiple-Site Alkylation to Homogenize Sub-Nanoporous Covalent Organic Frameworks for Efficient Sieving of Xenon/Krypton.

open access: yesACS Applied Materials and Interfaces, 2020
Among various fission products generated in nuclear reactors, xenon and krypton are two important fission gases with high flow, diffusivity, and radioactivity.
Zhimin Jia   +9 more
semanticscholar   +1 more source

High-Pressure Reactivity of Kr and F2—Stabilization of Krypton in the +4 Oxidation State

open access: yesCrystals, 2017
Since the synthesis of the first krypton compound, several other Kr-bearing connections have been obtained. However, in all of them krypton adopts the +2 oxidation state, in contrast to xenon which forms numerous compounds with an oxidation state as high
Dominik Kurzydłowski   +3 more
doaj   +1 more source

Two-photon cross-section calculations for krypton in the 190-220  nm range.

open access: yesApplied Optics, 2020
This paper presents multi-path, two-photon excitation cross-section calculations for krypton, using first-order perturbation theory. For evaluation of the two-photon-transition matrix element, this paper formulates the two-photon cross-section ...
D. Shekhtman   +2 more
semanticscholar   +1 more source

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