The Experts below are selected from a list of 231 Experts worldwide ranked by ideXlab platform
D R Nygren - One of the best experts on this subject based on the ideXlab platform.
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demonstratIon of selective single Barium Ion detectIon with dry diazacrown ether naphthalimide turn on chemosensors
ACS Sensors, 2021Co-Authors: Pawan Thapa, A D Mcdonald, Nicholas K Byrnes, Alena A Denisenko, James X Mao, Charleston A Newhouse, Thanh Thuy Vuong, Katherine Woodruff, Kwangho Nam, D R NygrenAbstract:Single-molecule fluorescence imaging (SMFI) of gas-phase Ions has been proposed for "Barium tagging," a burgeoning area of research in particle physics to detect individual Barium daughter Ions. This has potential to significantly enhance the sensitivity of searches for neutrinoless double-beta decay (0νββ) that is obscured by background radiatIon events. The chemistry required to make such sensitive detectIon of Ba2+ by SMFI in dry Xe gas at solid interfaces has implicatIons for solid-phase detectIon methods but has not been demonstrated. Here, we synthesized simple, robust, and effective Ba2+-selective chemosensors capable of functIon within ultrapure high-pressure 136Xe gas. Turn-on fluorescent naphthalimide-(di)azacrown ether chemosensors were Ba2+-selective and achieved SMFI in a polyacrylamide matrix. Fluorescence and NMR experiments supported a photoinduced electron transfer mechanism for turn-on sensing. Ba2+ selectivity was achieved with computatIonal calculatIons correctly predicting the fluorescence responses of sensors to Barium, mercury, and potassium Ions. With these molecules, dry-phase single-Ba2+ Ion imaging with turn-on fluorescence was realized using an oil-free microscopy technique for the first time-a significant advance toward single-Ba2+ Ion detectIon within large volumes of 136Xe, plausibly enabling a background-independent technique to search for the hypothetical process of 0νββ.
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Mobility and clustering of Barium Ions and dicatIons in high-pressure xenon gas
Physical Review A, 2018Co-Authors: E. Bainglass, B J P Jones, Frank W. Foss, Muhammad N. Huda, D R NygrenAbstract:The clustering and drift properties of Barium Ions in xenon gas are explored theoretically, using density functIonal theory and computatIonal Ion mobility theory, with the goal of better understanding Barium Ion transport for neutrinoless double beta decay. We derive the equilibrium conformatIons, energies and entropies of molecular Ions in the Ba$^{+}$-Xe and Ba$^{++}$-Xe systems, which yield a predictive model of cluster formatIon in high pressure gas. We calculate Ion-neutral interactIon potential curves for these species and use them to predict effective molecular Ion mobilities. Our calculatIon consistently reproduces experimental data on effective mobility and molecular Ion formatIon for the Ba$^+$ system, and predicts strong cluster formatIon in the Ba$^{++}$ system, dominated by stable [BaXe$_6$]$^{++}$,[BaXe$_7$]$^{++}$, [BaXe$_8$]$^{++}$ and [BaXe$_9$]$^{++}$ complexes in the range of interest. Some implicatIons for Barium tagging in gas-phase neutrinoless double beta decay experiments are discussed, and the first predictIons of pressure-dependent mobility of the doubly charged Ba$^{++}$ species are presented.
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demonstratIon of single Barium Ion sensitivity for neutrinoless double beta decay using single molecule fluorescence imaging
Physical Review Letters, 2018Co-Authors: A D Mcdonald, B J P Jones, D R Nygren, C Adams, V Alvarez, C D R Azevedo, J M Benllochrodriguez, F I G M Borges, A Botas, S CarcelAbstract:NEXT CollaboratIon acknowledges support from the following agencies and institutIons: the European Research Council (ERC) under Advanced Grant No. 339787-NEXT, the Ministerio de Economia y Competitividad of Spain under Grants No. FIS2014-53371-C04 and the Severo Ochoa Program SEV-2014-0398, the Generalitat Valenciana (GVA) of Spain under Grant No. PROMETEO/2016/120, the Portuguese FCT and FEDER through the program COMPETE, project PTDC/FIS/103860/2008, the U.S. Department of Energy under Contracts No. DE-AC02-07CH11359 (Fermi NatIonal Accelerator Laboratory) and No. DE-FG02-13ER42020 (Texas A&M) and No. DE-SC0017721 (University of Texas at Arlington), and the University of Texas at Arlington.
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single molecule fluorescence imaging as a technique for Barium tagging in neutrinoless double beta decay
Journal of Instrumentation, 2016Co-Authors: B J P Jones, A D Mcdonald, D R NygrenAbstract:Background rejectIon is key to success for future neutrinoless double beta decay experiments. To achieve sensitivity to effective Majorana lifetimes of ~ 1028 years, backgrounds must be controlled to better than 0.1 count per ton per year, beyond the reach of any present technology. In this paper we propose a new method to identify the birth of the Barium daughter Ion in the neutrinoless double beta decay of 136Xe. The method adapts Single Molecule Fluorescent Imaging, a technique from biochemistry research with demonstrated single Ion sensitivity. We explore possible SMFI dyes suitable for the problem of Barium Ion detectIon in high pressure xenon gas, and develop a fiber-coupled sensing system with which we can detect the presence of bulk Ba++ Ions remotely. We show that our sensor produces signal-to-background ratios as high as 85 in response to Ba++ Ions when operated in aqueous solutIon. We then describe the next stage of this R&D program, which will be to demonstrate chelatIon and fluorescence in xenon gas. If a successful Barium Ion tag can be developed using SMFI adapted for high pressure xenon gas detectors, the first essentially zero background, ton-scale neutrinoless double beta decay technology could be realized.
M D Barrett - One of the best experts on this subject based on the ideXlab platform.
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spectroscopy on a single trapped 137ba Ion for nuclear magnetic octupole moment determinatIon
Optics Express, 2012Co-Authors: Nicholas C Lewty, Boon Leng Chuah, Radu Cazan, B K Sahoo, M D BarrettAbstract:We present precisIon measurements of the hyperfine intervals in the 5D3/2 manifold of a single trapped Barium Ion, 137Ba+. Measurements of the hyperfine intervals are made between mF = 0 sublevels over a range of magnetic fields allowing us to interpolate to the zero field values with an accuracy below a few Hz, an improvement on previous measurements by three orders of magnitude. Our results, in conjunctIon with theoretical calculatIons, provide a 30-fold reductIon in the uncertainty of the magnetic dipole (A) and electric quadrupole (B) hyperfine constants. In additIon, we obtain the magnetic octupole constant (C) with an accuracy below 0.1Hz. This gives a subsequent determinatIon of the nuclear magnetic octupole moment, Ω, with an uncertainty of 1% limited almost completely by the accuracy of theoretical calculatIons. This constitutes the first observatIon of the octupole moment in 137Ba+ and the most accurately determined octupole moment to date.
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spectroscopy on a single trapped 137ba Ion for nuclear magnetic octupole moment determinatIon
arXiv: Atomic Physics, 2012Co-Authors: Nicholas C Lewty, Boon Leng Chuah, Radu Cazan, B K Sahoo, M D BarrettAbstract:We present precisIon measurements of the hyperfine intervals in the 5D3/2 manifold of a single trapped Barium Ion, 137 Ba+ . Measurements of the hyperfine intervals are made between mF = 0 sublevels over a range of magnetic fields allowing us to interpolate to the zero field values with an accuracy below a few Hz, an improvement on previous measurements by three orders of magnitude. Our results, in conjunctIon with theoretical calculatIons, provide a 30-fold reductIon in the uncertainty of the magnetic dipole (A) and electric quadrupole (B) hyperfine constants. In additIon, we obtain the magnetic octupole constant (C) with an accuracy below 0.1 Hz. This gives a subsequent determinatIon of the nuclear magnetic octupole moment, {\Omega}, with an uncertainty of 1% limited almost completely by the accuracy of theoretical calculatIons. This constitutes the first observatIon of the octupole moment in 137 Ba+ and the most accurately determined octupole moment to date.
B J P Jones - One of the best experts on this subject based on the ideXlab platform.
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Mobility and clustering of Barium Ions and dicatIons in high-pressure xenon gas
Physical Review A, 2018Co-Authors: E. Bainglass, B J P Jones, Frank W. Foss, Muhammad N. Huda, D R NygrenAbstract:The clustering and drift properties of Barium Ions in xenon gas are explored theoretically, using density functIonal theory and computatIonal Ion mobility theory, with the goal of better understanding Barium Ion transport for neutrinoless double beta decay. We derive the equilibrium conformatIons, energies and entropies of molecular Ions in the Ba$^{+}$-Xe and Ba$^{++}$-Xe systems, which yield a predictive model of cluster formatIon in high pressure gas. We calculate Ion-neutral interactIon potential curves for these species and use them to predict effective molecular Ion mobilities. Our calculatIon consistently reproduces experimental data on effective mobility and molecular Ion formatIon for the Ba$^+$ system, and predicts strong cluster formatIon in the Ba$^{++}$ system, dominated by stable [BaXe$_6$]$^{++}$,[BaXe$_7$]$^{++}$, [BaXe$_8$]$^{++}$ and [BaXe$_9$]$^{++}$ complexes in the range of interest. Some implicatIons for Barium tagging in gas-phase neutrinoless double beta decay experiments are discussed, and the first predictIons of pressure-dependent mobility of the doubly charged Ba$^{++}$ species are presented.
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demonstratIon of single Barium Ion sensitivity for neutrinoless double beta decay using single molecule fluorescence imaging
Physical Review Letters, 2018Co-Authors: A D Mcdonald, B J P Jones, D R Nygren, C Adams, V Alvarez, C D R Azevedo, J M Benllochrodriguez, F I G M Borges, A Botas, S CarcelAbstract:NEXT CollaboratIon acknowledges support from the following agencies and institutIons: the European Research Council (ERC) under Advanced Grant No. 339787-NEXT, the Ministerio de Economia y Competitividad of Spain under Grants No. FIS2014-53371-C04 and the Severo Ochoa Program SEV-2014-0398, the Generalitat Valenciana (GVA) of Spain under Grant No. PROMETEO/2016/120, the Portuguese FCT and FEDER through the program COMPETE, project PTDC/FIS/103860/2008, the U.S. Department of Energy under Contracts No. DE-AC02-07CH11359 (Fermi NatIonal Accelerator Laboratory) and No. DE-FG02-13ER42020 (Texas A&M) and No. DE-SC0017721 (University of Texas at Arlington), and the University of Texas at Arlington.
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single molecule fluorescence imaging as a technique for Barium tagging in neutrinoless double beta decay
Journal of Instrumentation, 2016Co-Authors: B J P Jones, A D Mcdonald, D R NygrenAbstract:Background rejectIon is key to success for future neutrinoless double beta decay experiments. To achieve sensitivity to effective Majorana lifetimes of ~ 1028 years, backgrounds must be controlled to better than 0.1 count per ton per year, beyond the reach of any present technology. In this paper we propose a new method to identify the birth of the Barium daughter Ion in the neutrinoless double beta decay of 136Xe. The method adapts Single Molecule Fluorescent Imaging, a technique from biochemistry research with demonstrated single Ion sensitivity. We explore possible SMFI dyes suitable for the problem of Barium Ion detectIon in high pressure xenon gas, and develop a fiber-coupled sensing system with which we can detect the presence of bulk Ba++ Ions remotely. We show that our sensor produces signal-to-background ratios as high as 85 in response to Ba++ Ions when operated in aqueous solutIon. We then describe the next stage of this R&D program, which will be to demonstrate chelatIon and fluorescence in xenon gas. If a successful Barium Ion tag can be developed using SMFI adapted for high pressure xenon gas detectors, the first essentially zero background, ton-scale neutrinoless double beta decay technology could be realized.
Chongli Zhong - One of the best experts on this subject based on the ideXlab platform.
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Radioactive Barium Ion Trap Based on Metal–Organic Framework for Efficient and Irreversible Removal of Barium from Nuclear Wastewater
ACS applied materials & interfaces, 2016Co-Authors: Yaguang Peng, Hongliang Huang, Dahuan Liu, Chongli ZhongAbstract:Highly efficient and irreversible capture of radioactive Barium from aqueous media remains a serious task for nuclear waste disposal and environmental protectIon. To address this task, here we propose a concept of Barium Ion trap based on metal-organic framework (MOF) with a strong Barium-chelating group (sulfate and sulfonic acid group) in the pore structures of MOFs. The functIonalized MOF-based Ion traps can remove >90% of the Barium within the first 5 min, and the removal efficiency reaches 99% after equilibrium. Remarkably, the sulfate-group-functIonalized Ion trap demonstrates a high Barium uptake capacity of 131.1 mg g(-1), which surpasses most of the reported sorbents and can selectively capture Barium from nuclear wastewater, whereas the sulfonic-acid-group-functIonalized Ion trap exhibits ultrafast kinetics with a kinetic rate constant k2 of 27.77 g mg(-1) min(-1), which is 1-3 orders of magnitude higher than existing sorbents. Both of the two MOF-based Ion traps can capture Barium irreversibly. Our work proposes a new strategy to design Barium adsorbent materials and provides a new perspective for removing radioactive Barium and other radIonuclides from nuclear wastewater for environment remediatIon. Besides, the concrete mechanisms of Barium-sorbent interactIons are also demonstrated in this contributIon.
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radioactive Barium Ion trap based on metal organic framework for efficient and irreversible removal of Barium from nuclear wastewater
ACS Applied Materials & Interfaces, 2016Co-Authors: Yaguang Peng, Hongliang Huang, Dahuan Liu, Chongli ZhongAbstract:Highly efficient and irreversible capture of radioactive Barium from aqueous media remains a serious task for nuclear waste disposal and environmental protectIon. To address this task, here we propose a concept of Barium Ion trap based on metal-organic framework (MOF) with a strong Barium-chelating group (sulfate and sulfonic acid group) in the pore structures of MOFs. The functIonalized MOF-based Ion traps can remove >90% of the Barium within the first 5 min, and the removal efficiency reaches 99% after equilibrium. Remarkably, the sulfate-group-functIonalized Ion trap demonstrates a high Barium uptake capacity of 131.1 mg g(-1), which surpasses most of the reported sorbents and can selectively capture Barium from nuclear wastewater, whereas the sulfonic-acid-group-functIonalized Ion trap exhibits ultrafast kinetics with a kinetic rate constant k2 of 27.77 g mg(-1) min(-1), which is 1-3 orders of magnitude higher than existing sorbents. Both of the two MOF-based Ion traps can capture Barium irreversibly. Our work proposes a new strategy to design Barium adsorbent materials and provides a new perspective for removing radioactive Barium and other radIonuclides from nuclear wastewater for environment remediatIon. Besides, the concrete mechanisms of Barium-sorbent interactIons are also demonstrated in this contributIon.
A D Mcdonald - One of the best experts on this subject based on the ideXlab platform.
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demonstratIon of selective single Barium Ion detectIon with dry diazacrown ether naphthalimide turn on chemosensors
ACS Sensors, 2021Co-Authors: Pawan Thapa, A D Mcdonald, Nicholas K Byrnes, Alena A Denisenko, James X Mao, Charleston A Newhouse, Thanh Thuy Vuong, Katherine Woodruff, Kwangho Nam, D R NygrenAbstract:Single-molecule fluorescence imaging (SMFI) of gas-phase Ions has been proposed for "Barium tagging," a burgeoning area of research in particle physics to detect individual Barium daughter Ions. This has potential to significantly enhance the sensitivity of searches for neutrinoless double-beta decay (0νββ) that is obscured by background radiatIon events. The chemistry required to make such sensitive detectIon of Ba2+ by SMFI in dry Xe gas at solid interfaces has implicatIons for solid-phase detectIon methods but has not been demonstrated. Here, we synthesized simple, robust, and effective Ba2+-selective chemosensors capable of functIon within ultrapure high-pressure 136Xe gas. Turn-on fluorescent naphthalimide-(di)azacrown ether chemosensors were Ba2+-selective and achieved SMFI in a polyacrylamide matrix. Fluorescence and NMR experiments supported a photoinduced electron transfer mechanism for turn-on sensing. Ba2+ selectivity was achieved with computatIonal calculatIons correctly predicting the fluorescence responses of sensors to Barium, mercury, and potassium Ions. With these molecules, dry-phase single-Ba2+ Ion imaging with turn-on fluorescence was realized using an oil-free microscopy technique for the first time-a significant advance toward single-Ba2+ Ion detectIon within large volumes of 136Xe, plausibly enabling a background-independent technique to search for the hypothetical process of 0νββ.
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demonstratIon of single Barium Ion sensitivity for neutrinoless double beta decay using single molecule fluorescence imaging
Physical Review Letters, 2018Co-Authors: A D Mcdonald, B J P Jones, D R Nygren, C Adams, V Alvarez, C D R Azevedo, J M Benllochrodriguez, F I G M Borges, A Botas, S CarcelAbstract:NEXT CollaboratIon acknowledges support from the following agencies and institutIons: the European Research Council (ERC) under Advanced Grant No. 339787-NEXT, the Ministerio de Economia y Competitividad of Spain under Grants No. FIS2014-53371-C04 and the Severo Ochoa Program SEV-2014-0398, the Generalitat Valenciana (GVA) of Spain under Grant No. PROMETEO/2016/120, the Portuguese FCT and FEDER through the program COMPETE, project PTDC/FIS/103860/2008, the U.S. Department of Energy under Contracts No. DE-AC02-07CH11359 (Fermi NatIonal Accelerator Laboratory) and No. DE-FG02-13ER42020 (Texas A&M) and No. DE-SC0017721 (University of Texas at Arlington), and the University of Texas at Arlington.
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single molecule fluorescence imaging as a technique for Barium tagging in neutrinoless double beta decay
Journal of Instrumentation, 2016Co-Authors: B J P Jones, A D Mcdonald, D R NygrenAbstract:Background rejectIon is key to success for future neutrinoless double beta decay experiments. To achieve sensitivity to effective Majorana lifetimes of ~ 1028 years, backgrounds must be controlled to better than 0.1 count per ton per year, beyond the reach of any present technology. In this paper we propose a new method to identify the birth of the Barium daughter Ion in the neutrinoless double beta decay of 136Xe. The method adapts Single Molecule Fluorescent Imaging, a technique from biochemistry research with demonstrated single Ion sensitivity. We explore possible SMFI dyes suitable for the problem of Barium Ion detectIon in high pressure xenon gas, and develop a fiber-coupled sensing system with which we can detect the presence of bulk Ba++ Ions remotely. We show that our sensor produces signal-to-background ratios as high as 85 in response to Ba++ Ions when operated in aqueous solutIon. We then describe the next stage of this R&D program, which will be to demonstrate chelatIon and fluorescence in xenon gas. If a successful Barium Ion tag can be developed using SMFI adapted for high pressure xenon gas detectors, the first essentially zero background, ton-scale neutrinoless double beta decay technology could be realized.