R. T. Zhang
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View article: Tomographic beta-gamma spectroscopy of nuclear beta decay
Tomographic beta-gamma spectroscopy of nuclear beta decay Open
Nuclear $β$ decay, a sensitive probe of nuclear structure and weak interactions, has become a precision test bed for physics beyond the Standard Model, driven by recent advances in spectrometric techniques. Here we introduce tomographic $β…
View article: The Role of Growth Mindset and Self-Control Strategies Between Outcome Experiences and Physical Activity: Insights from Structural Equation Model and System Dynamics
The Role of Growth Mindset and Self-Control Strategies Between Outcome Experiences and Physical Activity: Insights from Structural Equation Model and System Dynamics Open
Although outcome experiences are resistant to change, their impact on physical activity can be modulated through adaptive psychological mechanisms, including growth mindset and self-control strategies. Interventions targeting these modifia…
View article: Chloride Ion Transport in Concrete Subjected to Sustained Compressive Stress Under Different Dry-Wet Ratios
Chloride Ion Transport in Concrete Subjected to Sustained Compressive Stress Under Different Dry-Wet Ratios Open
Existing studies on chloride ion transport in concrete under compressive load had rarely incorporated the influence of the dry–wet time ratio, even though this ratio was a key factor affecting chloride penetration in coastal concrete struc…
View article: The Laboratory Measurement of the Line Ratios in X-Ray Emission Resulting from the Charge Exchange Between Mg11+ and Helium
The Laboratory Measurement of the Line Ratios in X-Ray Emission Resulting from the Charge Exchange Between Mg11+ and Helium Open
The line ratios in X-ray emission resulting from charge exchange between highly charged ions (HCIs) and neutral atoms are not only crucial for accurately modeling astrophysical X-ray emissions but also offer a unique perspective on the cha…
View article: Collision-energy-sensitive State Selectivity and Line Ratios in Charge Exchange between N<sup>5+</sup> and He
Collision-energy-sensitive State Selectivity and Line Ratios in Charge Exchange between N<sup>5+</sup> and He Open
Astrophysical charge-exchange modeling depends on an accurate database of state-resolved and velocity-dependent cross sections. The cross sections, resolved by the quantum state with principal n and orbital angular momentum ℓ , are pivotal…
View article: Emergent quasicrystal in fermionic superradiance
Emergent quasicrystal in fermionic superradiance Open
Quasicrystal is state of matter with multiple crystalline orders, displaying a short-range density-wave order and a long-range disorder. As an exotic state lying in between crystals and Anderson insulators, its dynamical formation is littl…
View article: CO Dissociation Induced by 1 keV/u Ar2+ Ion
CO Dissociation Induced by 1 keV/u Ar2+ Ion Open
CO is one of the important molecules in dense molecular clouds, and its dissociation induced by cosmic ray heavy ions is a fundamental process for molecular breaking up and rearrangement in astronomical networks. Extensive laboratory simul…
View article: Search for Cosmic-ray Boosted Sub-MeV Dark-Matter-Electron Scattering in PandaX-4T
Search for Cosmic-ray Boosted Sub-MeV Dark-Matter-Electron Scattering in PandaX-4T Open
We report the first search for the elastic scatterings between cosmic-ray boosted sub-MeV dark matter and electrons in the PandaX-4T liquid xenon experiment. Sub-MeV dark matter particles can be accelerated by scattering with electrons in …
View article: Absolute doubly differential angular sputtering yields for 20 keV Kr+ on polycrystalline Cu
Absolute doubly differential angular sputtering yields for 20 keV Kr+ on polycrystalline Cu Open
We have measured the absolute doubly differential angular sputtering yield for 20 keV Kr+ impacting a polycrystalline Cu slab at an incidence angle of θi = 45° relative to the surface normal. Sputtered Cu atoms were captured using collecto…
View article: Measurement of Solar $pp$ Neutrino Flux using Electron Recoil Data from PandaX-4T Commissioning Run
Measurement of Solar $pp$ Neutrino Flux using Electron Recoil Data from PandaX-4T Commissioning Run Open
The proton-proton ($pp$) fusion chain dominates the neutrino production from the Sun. The uncertainty of the predicted $pp$ neutrino flux is at the sub-percent level, whereas that of the best measurement is $\mathcal{O}(10\%)$. In this pap…
View article: Experimental Study on the Effect of Dual Source Fires Elevation on Flame Merging Characteristics in Road Tunnels
Experimental Study on the Effect of Dual Source Fires Elevation on Flame Merging Characteristics in Road Tunnels Open
View article: Searching for Two-Neutrino and Neutrinoless Double Beta Decay of $^{134}$Xe with the PandaX-4T Experiment
Searching for Two-Neutrino and Neutrinoless Double Beta Decay of $^{134}$Xe with the PandaX-4T Experiment Open
$^{134}$Xe is a candidate isotope for neutrinoless double beta decay~($0νββ$) search. In addition, the two-neutrino case ($2νββ$) allowed by the Standard Model of particle physics has not yet been observed. Utilizing the 10.4% of $^{134}$X…
View article: Absolute Doubly Differential Angular Sputtering Yields for 20 keV Kr+ on Polycrystalline Cu
Absolute Doubly Differential Angular Sputtering Yields for 20 keV Kr+ on Polycrystalline Cu Open
We have measured the absolute doubly differential angular sputtering yield for 20 keV Kr+ impacting a polycrystalline Cu slab at an incidence angle of θi = 45° relative to the surface normal. Sputtered Cu atoms were captured using collecto…
View article: Criss Cross Nebula: Case study of shock regions with resolved microstructures at scales of $\sim$1000 AU
Criss Cross Nebula: Case study of shock regions with resolved microstructures at scales of $\sim$1000 AU Open
Using integral field spectroscopy from MaNGA, we study the resolved microstructures in a shocked region in Criss Cross Nebula (CCN), with an unprecedentedly high resolution of $\lesssim$1000 AU. We measure surface brightness maps for 34 em…
View article: State-selective charge exchange cross sections in collisions of highly-charged sulfur ions with helium and molecular hydrogen
State-selective charge exchange cross sections in collisions of highly-charged sulfur ions with helium and molecular hydrogen Open
The state-selective cross section data are useful for understanding and modeling the x-ray emission in celestial observations. In the present work, using the cold target recoil ion momentum spectroscopy, for the first time we investigated …
View article: Search for Dark-Matter–Nucleon Interactions with a Dark Mediator in PandaX-4T
Search for Dark-Matter–Nucleon Interactions with a Dark Mediator in PandaX-4T Open
We report results of a search for dark-matter–nucleon interactions via a dark mediator using optimized low-energy data from the PandaX-4T liquid xenon experiment. With the ionization-signal-only data and utilizing the Migdal effect, we set…
View article: Search for Light Dark Matter from the Atmosphere in PandaX-4T
Search for Light Dark Matter from the Atmosphere in PandaX-4T Open
We report a search for light dark matter produced through the cascading decay of η mesons, which are created as a result of inelastic collisions between cosmic rays and Earth's atmosphere. We introduce a new and general framework, publicly…
View article: Strongly perturbed state-selective charge exchange between slow<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msup><mml:mrow><mml:mi>Ar</mml:mi></mml:mrow><mml:mrow><mml:mn>8</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup></mml:math>and He
Strongly perturbed state-selective charge exchange between slowand He Open
We report an experimental and theoretical study of state-selective charge exchange processes in Ar^{8+} on He collisions at 1 and 3 keV/amu, benchmarking the fundamental electron capture dynamics under strong perturbations. The quantum-sta…
View article: State-selective Charge Exchange in 19.5–100 keV amu<sup>−1</sup> O<sup>6+</sup> Collision with He and H<sub>2</sub>
State-selective Charge Exchange in 19.5–100 keV amu<sup>−1</sup> O<sup>6+</sup> Collision with He and H<sub>2</sub> Open
The cross sections of state-selective charge exchange (CX) between highly charged ions and neutrals are important for modeling extreme ultraviolet and soft X-ray emissions in many astrophysical objects with hot plasma impacting cold media.…
View article: Methane Cluster Fragmentation by Fast Electron Impact
Methane Cluster Fragmentation by Fast Electron Impact Open
We investigate the fragmentation of the CH4 cluster by fast electron impact at stagnation pressures from 0.5 bar to 16 bar. By measuring the time of flight spectrum (TOF), two types of ions, including (CH4)n−1CH5+ and (CH4)n−2(C2Hm)+, are …
View article: Benchmark n ℓ-resolved Cross Sections of Single and Double Charge Exchange Processes in 1.67–20 keV u<sup>−1</sup> C<sup>4+</sup> Collisions with He
Benchmark n ℓ-resolved Cross Sections of Single and Double Charge Exchange Processes in 1.67–20 keV u<sup>−1</sup> C<sup>4+</sup> Collisions with He Open
State-resolved charge exchange (CX) cross sections are of the utmost importance for modeling related photon emissions existing in a broad range of astrophysical environments. With the cold-target recoil-ion momentum spectroscopy, we determ…
View article: Target and Velocity Dependence of Charge Exchange X-Ray Emission at Solar Wind Velocities
Target and Velocity Dependence of Charge Exchange X-Ray Emission at Solar Wind Velocities Open
Laboratory measurements of X-ray emissions following charge exchange (CX) between highly charged ions and neutrals are important to assess their diagnostic utility for the nonequilibrium astrophysical plasma environments, where hot flows m…
View article: Measurement of n- and l-resolved State-selective Charge Exchange in Ar<sup>8+</sup> Collision with He
Measurement of n- and l-resolved State-selective Charge Exchange in Ar<sup>8+</sup> Collision with He Open
The state-resolved capture cross sections for principal n and orbital angular momentum l play an important role in modeling soft X-ray emissions induced by charge exchange for many astrophysical environments. However, the empirical and sem…
View article: Measurement of the Charge Exchange Cross Section for N<sup>7+</sup>, O<sup>7+</sup> Ions in Collision with Atomic H
Measurement of the Charge Exchange Cross Section for N<sup>7+</sup>, O<sup>7+</sup> Ions in Collision with Atomic H Open
The absolute total cross sections for the charge exchange between highly charged ions 15 N 7+ , O 7+ , and atomic H have been measured with the ion-atom merged-beams apparatus at Oak Ridge National Laboratory. The collision energy range is…
View article: Uncertainties in Atomic Data for Modeling Astrophysical Charge Exchange Plasmas
Uncertainties in Atomic Data for Modeling Astrophysical Charge Exchange Plasmas Open
Relevant uncertainties of theoretical atomic data are vital to determining the accuracy of plasma diagnostics in a number of areas, including, in particular, the astrophysical study. We present a new calculation of the uncertainties on the…
View article: Measurement of n-resolved State-selective Charge Exchange in Ne<sup>(8,9)+</sup> Collision with He and H<sub>2</sub>
Measurement of n-resolved State-selective Charge Exchange in Ne<sup>(8,9)+</sup> Collision with He and H<sub>2</sub> Open
Charge exchange between highly charged ions and neutral atoms and molecules has been considered as one of the important mechanisms controlling soft X-ray emissions in many astrophysical objects and environments. However, for modeling charg…
View article: [Hypoxia and inflammation are risk factors for acute myocardial injury in patients with coronavirus disease 2019].
[Hypoxia and inflammation are risk factors for acute myocardial injury in patients with coronavirus disease 2019]. Open
Hypoxic state and inflammation may play a key role in the pathogenesis of acute myocardial injury in COVID-19 patients.
View article: Impact parameter sensitive study of inner-shell atomic processes in Xe<sup>54+</sup>, Xe<sup>52+</sup> → Xe collisions
Impact parameter sensitive study of inner-shell atomic processes in Xe<sup>54+</sup>, Xe<sup>52+</sup> → Xe collisions Open
Synopsis In this work, we present a pilot experiment in the experimental storage ring (ESR) at GSI devoted to impact parameter sensitive studies of inner shell atomic processes for bare and He-like xenon ions (Xe 54+ , Xe 52+ ) colliding w…
View article: The fragmentation of neon dimer induced by low energy O<sup>6+</sup>ions
The fragmentation of neon dimer induced by low energy O<sup>6+</sup>ions Open
We have investigated the fragmentation channels Ne+-Ne+ and Ne2+-Ne+ from Ne2 dimer induced by O6+ ions at impact energy of 15 keV/u. The Ne+-Ne+ fragmentation channel mainly results from three pathways: the interatomic coulombic decay of …
View article: The nucleus-nucleus scattering in transfer ionization of helium by He<sup>2+</sup>impact
The nucleus-nucleus scattering in transfer ionization of helium by He<sup>2+</sup>impact Open
We have performed kinematically complete measurement on transfer ionization of He by 50 keV/u He2+ impact. The data were analyzed in terms of Dalitz spectrum. We evaluated the role of three particles interactions and found that the main mo…