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https://www.readbyqxmd.com/read/27917867/interatomic-coulombic-decay-cascades-in-multiply-excited-neon-clusters
#1
K Nagaya, D Iablonskyi, N V Golubev, K Matsunami, H Fukuzawa, K Motomura, T Nishiyama, T Sakai, T Tachibana, S Mondal, S Wada, K C Prince, C Callegari, C Miron, N Saito, M Yabashi, Ph V Demekhin, L S Cederbaum, A I Kuleff, M Yao, K Ueda
In high-intensity laser light, matter can be ionized by direct multiphoton absorption even at photon energies below the ionization threshold. However on tuning the laser to the lowest resonant transition, the system becomes multiply excited, and more efficient, indirect ionization pathways become operative. These mechanisms are known as interatomic Coulombic decay (ICD), where one of the species de-excites to its ground state, transferring its energy to ionize another excited species. Here we show that on tuning to a higher resonant transition, a previously unknown type of interatomic Coulombic decay, intra-Rydberg ICD occurs...
December 5, 2016: Nature Communications
https://www.readbyqxmd.com/read/27910676/in-situ-wavelength-calibration-of-the-edge-cxs-spectrometers-on-jet
#2
E Delabie, N Hawkes, T M Biewer, M G O'Mullane
A method for obtaining an accurate wavelength calibration over the entire focal plane of the JET edge CXS spectrometers is presented that uses a combination of the fringe pattern created with a Fabry-Pérot etalon and a neon lamp for cross calibration. The accuracy achieved is 0.03 Å, which is the same range of uncertainty as when neglecting population effects on the rest wavelength of the CX line. For the edge CXS diagnostic, this corresponds to a flow velocity of 4.5 km/s in the toroidal direction or 1.9 km/s in the poloidal direction...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910613/feasibility-of-line-ratio-spectroscopy-on-helium-and-neon-as-edge-diagnostic-tool-for-wendelstein-7-x
#3
T Barbui, M Krychowiak, R König, O Schmitz, J M Muñoz Burgos, B Schweer, A Terra
A beam emission spectroscopy system on thermal helium (He) and neon (Ne) has been set up at Wendelstein 7-X to measure edge electron temperature and density profiles utilizing the line-ratio technique or its extension by the analysis of absolutely calibrated line emissions. The setup for a first systematic test of these techniques of quantitative atomic spectroscopy in the limiter startup phase (OP1.1) is reported together with first measured profiles. This setup and the first results are an important test for developing the technique for the upcoming high density, low temperature island divertor regime...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910523/first-measurement-of-the-edge-charge-exchange-recombination-spectroscopy-on-east-tokamak
#4
Y Y Li, X H Yin, J Fu, D Jiang, S Y Feng, B Lyu, Y J Shi, Y Yi, X J Zhou, C D Hu, M Y Ye, B N Wan
An edge toroidal charge exchange recombination spectroscopy (eCXRS) diagnostic, based on a heating neutral beam injection (NBI), has been deployed recently on the Experimental Advanced Superconducting Tokamak (EAST). The eCXRS, which aims to measure the plasma ion temperature and toroidal rotation velocity in the edge region simultaneously, is a complement to the exiting core CXRS (cCXRS). Two rows with 32 fiber channels each cover a radial range from ∼2.15 m to ∼2.32 m with a high spatial resolution of ∼5-7 mm...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27910392/real-time-radiative-divertor-feedback-control-development-for-the-nstx-u-tokamak-using-a-vacuum-ultraviolet-spectrometer
#5
V A Soukhanovskii, R Kaita, B Stratton
A radiative divertor technique is planned for the NSTX-U tokamak to prevent excessive erosion and thermal damage of divertor plasma-facing components in H-mode plasma discharges with auxiliary heating up to 12 MW. In the radiative (partially detached) divertor, extrinsically seeded deuterium or impurity gases are used to increase plasma volumetric power and momentum losses. A real-time feedback control of the gas seeding rate is planned for discharges of up to 5 s duration. The outer divertor leg plasma electron temperature Te estimated spectroscopically in real time will be used as a control parameter...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27908117/investigating-tunnel-and-above-barrier-ionization-using-complex-scaled-coupled-cluster-theory
#6
Thomas-C Jagau
The theory and implementation of the complex-scaled coupled-cluster method with singles and doubles excitations (cs-CCSD) for studying resonances induced by static electric fields are presented. Within this framework, Stark shifts and ionization rates are obtained directly from the real and imaginary parts of the complex energy. The method is applied to the ground states of hydrogen, helium, lithium, beryllium, neon, argon, and carbon at varying field strengths. Complex-scaled Hartree-Fock, second-order many-body perturbation theory, and CCSD results are reported and analyzed with a focus on the impact of electron correlation on the ionization process...
November 28, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/27886307/a-simple-guiding-principle-for-the-temperature-dependence-of-the-solubility-of-light-gases-in-imidazolium-based-ionic-liquids-derived-from-molecular-simulations
#7
Daniela Kerlé, Majid Namayandeh Jorabchi, Ralf Ludwig, Sebastian Wohlrab, Dietmar Paschek
We have determined the temperature dependence of the solvation behavior of a large collection of important light gases in imidazolium-based ionic liquids with the help of extensive molecular dynamics simulations. The motivation of our study is to unravel common features of the temperature dependent solvation under well controlled conditions, and to provide a guidance for cases, where experimental data from different sources disagree significantly. The solubility of molecular hydrogen, oxygen, nitrogen, methane, krypton, argon, neon and carbon dioxide in the imidazolium based ionic liquids of type 1-n-alkyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([Cnmim][NTf2]) with varying alkyl side chain lengths n = 2, 4, 6, 8 is computed for a temperature range between 300 K and 500 K at 1 bar...
November 25, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27869265/radiation-induced-transformations-of-methanol-molecules-in-low-temperature-solids-a-matrix-isolation-study
#8
Elizaveta V Saenko, Vladimir I Feldman
The effect of X-ray irradiation on methanol molecules (CH3OH, CD3OH, and (13)CH3OH) isolated in solid noble gas matrices (Ne, Ar, Kr, and Xe) was studied by FTIR spectroscopy at 6 K. CH2OH˙, H2CO, HCO˙ and CO were found to be the main degradation products. Somewhat unexpectedly, the production of CO is quite prominent, even at low doses, and it strongly predominates in low-polarizable matrices (especially, in neon). This result is explained by inefficient quenching of excess energy in the H2CO molecules initially generated from methanol...
November 30, 2016: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/27824470/longitudinal-spin-relaxation-of-optically-pumped-rubidium-atoms-in-solid-parahydrogen
#9
Sunil Upadhyay, Andrew N Kanagin, Chase Hartzell, Tim Christy, W Patrick Arnott, Takamasa Momose, David Patterson, Jonathan D Weinstein
We have grown crystals of solid parahydrogen using a single closed-cycle cryostat. We have doped the crystals with rubidium atoms at densities on the order of 10^{17}  cm^{-3} and used optical pumping to polarize the spin state of the implanted atoms. The optical spectrum of the rubidium atoms shows larger broadening than previous work in which the rubidium was implanted in solid argon or neon. However, the optical pumping behavior is significantly improved, with both a larger optical pumping signal and a longer longitudinal relaxation time...
October 21, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/27806185/ultraviolet-and-infrared-spectra-of-diboron-in-solid-neon-at-4-k
#10
Jen-Iu Lo, Sheng-Lung Chou, Hsiao-Chi Lu, Yu-Chain Peng, Meng-Yeh Lin, Bing-Ming Cheng, J F Ogilvie
Apart from products H, B, BH, BH2 and BH3 identified from their emission spectra in the UV-visible region, photolysis of diborane(6) dispersed in solid neon at 4 K with far-ultraviolet light from a synchrotron led to observation of absorption line (0,0) of electronic transition A 3Σu- ← X 3Σg- of B2 at 326.39 nm; absorption lines (1,0) of 11B2, 11B10B and 10B2 were recorded at 316.63, 316.40 and 316.15 nm, respectively. △G1/2 of A 3Σu- state for 11B2, 11B10B and 10B2 in solid neon are accordingly derived to be 945, 968 and 993 cm-1, respectively...
November 2, 2016: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/27802855/a-remarkable-case-of-rhabdomyolysis-associated-with-ingestion-of-energy-drink-neon-volt
#11
Praneet S Iyer, Rishitha Yelisetti, Varun Miriyala, Waqas Siddiqui, Anand Kaji
Rhabdomyolysis is defined as a syndrome characterized by muscle necrosis and the release of intracellular muscle constituents into the circulation. We present a case of a 35-year-old male who exercised for 2 h after ingesting energy drink and subsequently presented with rhabdomyolysis. After excluding common and uncommon causes of rhabdomyolysis, we reached the conclusion that the likely cause was the ingestion of energy drink 'NEON VOLT' in a setting of mild dehydration. Increasing physical activity and intense exercise is becoming a trend in many countries, due to its many health-related benefits such as prevention of obesity...
2016: Journal of Community Hospital Internal Medicine Perspectives
https://www.readbyqxmd.com/read/27802744/a-combined-segmented-anode-gas-ionization-chamber-and-time-of-flight-detector-for-heavy-ion-elastic-recoil-detection-analysis
#12
Petter Ström, Per Petersson, Marek Rubel, Göran Possnert
A dedicated detector system for heavy ion elastic recoil detection analysis at the Tandem Laboratory of Uppsala University is presented. Benefits of combining a time-of-flight measurement with a segmented anode gas ionization chamber are demonstrated. The capability of ion species identification is improved with the present system, compared to that obtained when using a single solid state silicon detector for the full ion energy signal. The system enables separation of light elements, up to Neon, based on atomic number while signals from heavy elements such as molybdenum and tungsten are separated based on mass, to a sample depth on the order of 1 μm...
October 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27796294/atomic-intercalation-to-measure-adhesion-of-graphene-on-graphite
#13
Jun Wang, Dan C Sorescu, Seokmin Jeon, Alexei Belianinov, Sergei V Kalinin, Arthur P Baddorf, Petro Maksymovych
The interest in mechanical properties of two-dimensional materials has emerged in light of new device concepts taking advantage of flexing, adhesion and friction. Here we demonstrate an effective method to measure adhesion of graphene atop highly ordered pyrolytic graphite, utilizing atomic-scale 'blisters' created in the top layer by neon atom intercalates. Detailed analysis of scanning tunnelling microscopy images is used to reconstruct atomic positions and the strain map within the deformed graphene layer, and demonstrate the tip-induced subsurface translation of neon atoms...
October 31, 2016: Nature Communications
https://www.readbyqxmd.com/read/27758023/clinical-outcomes-in-youth-beyond-the-first-year-of-type-1-diabetes-results-of-the-pediatric-diabetes-consortium-pdc-type-1-diabetes-new-onset-neon-study
#14
Eda Cengiz, Peiyao Cheng, Katrina J Ruedy, Craig Kollman, William V Tamborlane, Georgeanna J Klingensmith, Robin L Gal, Janet Silverstein, Joyce Lee, Maria J Redondo, Roy W Beck
OBJECTIVE: Current data are limited on the course of type 1 diabetes (T1D) in children and adolescents through the first few years of diabetes. The Pediatric Diabetes Consortium T1D new onset (NeOn) Study was undertaken to prospectively assess natural history and clinical outcomes in children treated at 7 US diabetes centers from the time of diagnosis. This paper describes clinical outcomes in the T1D NeOn cohort during the first 3 years postdiagnosis. RESULTS: A total of 1048 participants (mean age 9...
October 19, 2016: Pediatric Diabetes
https://www.readbyqxmd.com/read/27746760/distinguishing-representations-as-origin-and-representations-as-input-roles-for-individual-neurons
#15
Jonathan C W Edwards
It is widely perceived that there is a problem in giving a naturalistic account of mental representation that deals adequately with the issue of meaning, interpretation, or significance (semantic content). It is suggested here that this problem may arise partly from the conflation of two vernacular senses of representation: representation-as-origin and representation-as-input. The flash of a neon sign may in one sense represent a popular drink, but to function as a representation it must provide an input to a 'consumer' in the street...
2016: Frontiers in Psychology
https://www.readbyqxmd.com/read/27742255/antiproton-stopping-power-data-for-radiation-therapy-simulations
#16
J J Bailey, A S Kadyrov, I B Abdurakhmanov, D V Fursa, I Bray
Stopping powers of H, He, H2, and H2O targets for antiprotons have been calculated using a convergent close-coupling method. For He and H2 targets electron-electron correlations are fully accounted for using a multiconfiguration approximation. Two-electron processes are included using an independent-event model. The water molecule is described using a neon-like structure model with a pseudo-spherical potential. Results are tabulated for the purpose of Monte Carlo simulations to model antiproton transport through matter for radiation therapy...
October 11, 2016: Physica Medica: PM
https://www.readbyqxmd.com/read/27723974/infrared-spectra-of-novel-ngbeso2-complexes-ng-ne-ar-kr-xe-in-low-temperature-matrices
#17
Wenjie Yu, Xing Liu, Bing Xu, Xiaopeng Xing, Xuefeng Wang
The novel noble-gas complexes NgBeSO2 (Ng=Ne, Ar, Kr, Xe) have been prepared in the laser-evaporated beryllium atom reactions with SO2 in low-temperature matrices. Doped with heavier noble gas, the guest (Ar, Kr, Xe) atom can substitute neon to form more stable complex. Infrared spectroscopy and theoretical calculations are used to confirm the band assignment. The dissociation energies are calculated at 0.9, 4.0, 4.7, and 6.0 kcal/mol for NeBeSO2, ArBeSO2, KrBeSO2, and XeBeSO2, respectively, at the CCSD(T) level...
October 11, 2016: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/27716637/adaptation-of-the-microdosimetric-kinetic-model-to-hypoxia
#18
C Bopp, R Hirayama, T Inaniwa, A Kitagawa, N Matsufuji, K Noda
Ion beams present a potential advantage in terms of treatment of lesions with hypoxic regions. In order to use this potential, it is important to accurately model the cell survival of oxic as well as hypoxic cells. In this work, an adaptation of the microdosimetric kinetic (MK) model making it possible to account for cell hypoxia is presented. The adaptation relies on the modification of damage quantity (double strand breaks and more complex lesions) due to the radiation. Model parameters such as domain size and nucleus size are then adapted through a fitting procedure...
October 7, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27716359/trhont-building-an-ontology-to-assist-rehabilitation-processes
#19
Idoia Berges, David Antón, Jesús Bermúdez, Alfredo Goñi, Arantza Illarramendi
BACKGROUND: One of the current research efforts in the area of biomedicine is the representation of knowledge in a structured way so that reasoning can be performed on it. More precisely, in the field of physiotherapy, information such as the physiotherapy record of a patient or treatment protocols for specific disorders must be adequately modeled, because they play a relevant role in the management of the evolutionary recovery process of a patient. In this scenario, we introduce TRHONT, an application ontology that can assist physiotherapists in the management of the patients' evolution via reasoning supported by semantic technology...
October 4, 2016: Journal of Biomedical Semantics
https://www.readbyqxmd.com/read/27715102/double-core-hole-states-in-neon-lifetime-post-collision-interaction-and-spectral-assignment
#20
G Goldsztejn, T Marchenko, R Püttner, L Journel, R Guillemin, S Carniato, P Selles, O Travnikova, D Céolin, A F Lago, R Feifel, P Lablanquie, M N Piancastelli, F Penent, M Simon
Using synchrotron radiation and high-resolution electron spectroscopy, we have directly observed and identified specific photoelectrons from K^{-2}V states in neon corresponding to simultaneous 1s ionization and 1s→valence excitation. The natural lifetime broadening of the K^{-2}V states and the relative intensities of different types of shakeup channels have been determined experimentally and compared to ab initio calculations. Moreover, the high-energy Auger spectrum resulting from the decay of Ne^{2+}K^{-2} and Ne^{+}K^{-2}V states as well as from participator Auger decay from Ne^{+}K^{-1}L^{-1}V states, has been measured and assigned in detail utilizing the characteristic differences in lifetime broadenings of these core hole states...
September 23, 2016: Physical Review Letters
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