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This paper presents a detailed study of low energy positron scattering from formic acid, examining elastic scattering, electronic excitation and ionisation processes. Through detailed comparisons with previous experimental and theoretical data, it is clear that the picture for positron scattering from this target remains incomplete, with significant disagreement between experiment and theory in the comparisons of differential cross section data. Calculations of elastic electron scattering are unexpectedly in better agreement with the positron scattering experiments, and give some hints as to potential areas for improvement in the modelling of scattering for targets which tend to be dominated by dipole interactions. [ABSTRACT FROM AUTHOR]

In this work, a method for evaluating the cross sections of electroproduction of and off protons in the region of invariant masses of final hadrons GeV ( and being the masses of the kaon and hyperon, respectively) and squares of four-momentum transfers of virtual photons, i.e., photon virtualities GeV , is developed based on experimental data of these exclusive channels' cross sections measured by the CLAS detector in Hall B at Jefferson Lab. A set of algorithms has been implemented to evaluate the differential cross sections of these channels, along with their statistical and systematic uncertainties. A program was developed for the evaluation of differential cross sections and structure functions using C++ and Python libraries. An interactive website was created for working with the program, enabling the analysis of one-dimensional and two-dimensional dependences of structure functions and differential cross sections. The evaluation of differential cross sections for the and electroproduction channels is necessary for extracting the structure function from the data on the polarization asymmetry of electroproduction reactions of these final states with longitudinally polarized electrons. The obtained results are also important for the development of realistic Monte Carlo event generators in planning future experiments and for evaluating the efficiency of detecting final particles when extracting reaction cross sections from experimental data. [ABSTRACT FROM AUTHOR]

The complex optical model has been widely used to describe the elastic scattering of the nucleon–nucleus. The imaginary term of the optical potential takes into account the non-elastic scattering processes. This term was taken to be a Woods–Saxon form factor or its derivative to simulate the volume absorption or the absorption localized at the surface of the target, respectively. In this study, a fractional derivative of the Woods–Saxon potential with 0 < α < 1 was used, where α = 0 and α = 1 give the volume and the surface absorption form factor, respectively. [ABSTRACT FROM AUTHOR]

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Theoretical investigations of electron-impact ionisation for carbon dioxide (CO2) in low to intermediate energy ranges are presented. In addition to the energy range, we have estimated triple differential cross-section (TDCS) in coplanar and perpendicular plane geometry. We have calculated the TDCS for electron impact using the modified distorted wave formalism up to the second order. Post-collision interaction effects have also been introduced to describe the collision dynamics accurately. There is a good correlation between the distorted-wave Born approximation results and the experimental results in terms of forward and backward scattering regions. [ABSTRACT FROM AUTHOR]

The non-adiabatic dynamical calculations of the K(4s2S) + H2(v 0 = 1, 2, j 0 = 0) reaction are carried out using the time-dependent wave packet method. The non-adiabatic dynamics results, such as reaction probabilities and integral cross sections, are calculated and compared with previous adiabatic values. The adiabatic values are several tens of times larger than those of the non-adiabatic results. The non-adiabatic effect becomes stronger with the increase in the number of excited vibrational states. In addition, the excitation of the vibrational states of H2 can increase the reaction probability of the reaction channel. However, the KH product is still barely formed through the K(4s2S) + H2 reaction, even if the H2 molecule is excited to a high vibrational excited state, which also leads to the opposite conclusion from the adiabatic results. The forward-biased differential cross sections indicate that a direct stripping mechanism plays a dominant role in the reaction. [ABSTRACT FROM AUTHOR]

The aim of this study is to study the Differential Cross Sections (DCS) in the presence of a linear polal'ized laser field for Bessel functions of various orders, with oxygen molecules as the target within a Lennard-Jones potential framewo1'k. The developed model is theoretical in which different assumptions are used, born appt•oximation, Bessel function, central approximation, etc. the developed model was computed for analysis using online MATLAB. The observation shows projected electl'on gain and loss energies in the presence of the oxygen molecules. A pronounced deep peak in the results suggests an alignment of incidence and final energies, potentially indicating new particle formation. Additionally, a minimum DCS point signifies an intense interaction and scattering between the incident electron and the target, suggesting the formation of pa1iicles smaller than both the target and the electron. Notably, the zero-order Bessel function exhlbits a higher DCS than its higher-order counterpat'ts, likely owing to distinct mathematical and physical p1•operties. At a zero-radian scattering angle, the DCS achieves its minimum, highlighting a heightened probability of particle formation due to close alignment and collision between incident and scattered particles. This finding undel'scores the significance of this pa1iicular angle in unde!'standing pa1ilcle interactions, This study's revelations offer valuable implications for understanding energy exchange and pat'ticle formation processes in similar contexts. Further reseal'ch in this area could delve into specific mechanisms underlying the observed phenomena, potentially leading to advancements in particle interaction dynamics. Moreover, these findings contribute to the broader undetstanding of the fundamental physics goveming such interactions, with potential applications in various fields of science and engineering. [ABSTRACT FROM AUTHOR]

The complex optical model has been widely used to describe the elastic scattering of the nucleon–nucleus. The imaginary term of the optical potential takes into account the non-elastic scattering processes. This term was taken to be a Woods–Saxon form factor or its derivative to simulate the volume absorption or the absorption localized at the surface of the target, respectively. In this study, a fractional derivative of the Woods–Saxon potential with 0<α<1 was used, where α=0 and α=1 give the volume and the surface absorption form factor, respectively.

Today, the use of artificial intelligence in electron optics, as in many other fields, has begun to increase. In this scope, we present a machine learning framework to predict experimental cross-section data. Our framework includes 8 deep learning models and 13 different machine learning algorithms that learn the fundamental structure of the data. This article aims to develop a machine learning framework to accurately predict double-differential cross-section values. This approach combines multiple models such as convolutional neural networks, machine learning algorithms, and autoencoders to create a more robust prediction system. The data for training the models are obtained from experimental data for different atomic and molecular targets. We developed a methodology for learning tasks, mainly using rigorous prediction error limits. Prediction results show that the machine learning framework can predict the scattering angle and energy of scattering electrons with high accuracy, with an R-squared score of up to 99% and a mean squared error of

This study aims to investigate the differential cross section (DCS) across a Josephson junction in a superconductor with Kondo in1purities, addressing a limitation of the previous work conducted by Goldstein et al. (2013). The DCS is derived using the Bransden and Joachain as well as the Sakurai methods, employing the Kroll Watson Approximation. The analysis focuses on examining the behavior of the DCS at both lower and higher frequencies. The results demonstrate that the DCS exhibits a linear increase at lower frequencies, while at higher frequencies, it shows an exponential increase with fluctuations. These findings provide valuable insights into the scattering phenomena in superconductors with Kondo impurities, shedding light on the interplay between the Kondo effect, impurity scattering, and Josephson coupling. Further research can explore the influence of additional factors such as temperature, impurity concentration, and lattice structure on the observed scattering dynamics. Moreover, investigations into the transport properties, proximity effects, and phase dynamics of Josephson junctions with Kondo impurities would contribute to a comprehensive understanding of these systems. [ABSTRACT FROM AUTHOR]

• The current state of knowledge on PLD-grown Al 2 O 3 coatings was reviewed. • PLD-grown amorphous Al 2 O 3 coatings were irradiated with 250 keV and 1.2 MeV Au ions. • Influence of irradiations on mechanical properties was studied via nanoindentation. • The coating exhibit excellent room temperature radiation resistance. • Qualitative data obtained in low and high energy experiment are consistent. Differential cross sections of the 6Li(d,nʹγ)7Be, 6Li(d,pʹγ)7Li, 7Li(d,dʹγ)7Li and 19F(d,pʹγ)20F reactions were determined at three detection angles (0°, 55° and 90°), for deuteron energies ranging from 1000 keV up to 2200 keV, with a 20 keV step. For the detection of the γ-ray peaks of interest at E γ = 429 keV, E γ = 478 keV and E γ = 656 keV, two different LiF targets were used. Three HPGe detectors having a 80% relative efficiency were placed around the targets for the detection of the gamma-ray peaks under study. The present results are compared with existing ones from the literature and the erroneous omission of the 7Li(d,dʹγ)7Li reaction contribution in the yield of the 478 gamma ray in natLi targets is discussed and analyzed. Comparisons with previously reported absolute thick target yields are also performed. Despite the fact that the differential cross sections determined in the present work are in very good agreement with previously reported differential cross-section datasets in literature (properly corrected), remarkable discrepancies in the case of existing absolute thick target yields are observed. [ABSTRACT FROM AUTHOR]

Differential cross sections of the reaction 7Li(p,p΄γ 1-0)7Li were experimentally determined in the proton energy range between 1000 and 4000 keV. The experiment was conducted at the Tandem Accelerator Laboratory of N.C.S.R. "Demokritos". The detection of the emitted gamma rays, having an energy E γ = 477.6 keV, was accomplished using four HPGe detectors of relative efficiency varying between 18 and 80%, at the detection angles of 0°, 55°, 90° and 165°. The statistical errors of the measurements did not exceed 4%, while the overall systematic uncertainty budget was also kept as low as possible (∼8%). For the validation of the obtained cross sections a benchmarking experiment was performed using a thick target of known stoichiometry. The comparison with existing experimental datasets in literature is also presented and discussed. [ABSTRACT FROM AUTHOR]

Within the framework of the generalized peripheral model (GPM), the process of proton stripping in the 12C(3He, d)13N reaction to the first excited resonance state (E* = 2.365 MeV and Jπ = 1/2+) of the 13N nucleus at energies E 3 He = 16, 17, 18, 34, and 81.4 MeV is considered. Its proton width Гp has been determined. It is shown that taking into account three-body Coulomb effects in the proton transfer reaction significantly changes the absolute value of the calculated differential cross section, which leads to a decrease in the extracted Гp value. The obtained value of proton width Гp = 30.1 ± 0.8 keV for the 13N nucleus (E* = 2.365 MeV) is in good agreement with the experimental value of 31.7 ± 0.8 keV. [ABSTRACT FROM AUTHOR]

To understand the effect of different vibrational and rotational modes of reactant to enhance the reactivity of the O + HO2 → OH + O2 reaction, we revisited this important atmospheric reaction. We report here a quasi‐classical trajectory (QCT) study of the reaction dynamics on a recently developed full‐dimensional potential energy surface (PES). Our previous work has indicated that this reaction has two pathways, the H abstraction (HA) channel and the O abstraction (OA) channel, which lead to totally different product energy distribution. In this work, we identified that the vibrational excitation of the OH stretching (v1) mode of HO2 is the switch of the HA channel at low collision energy; meanwhile, the rotational excitation can also greatly change the branching ratio of the two pathways. With the excitation of v1 mode, the original negligible HA channel controlled by the tight transition state becomes quite important. This work presents an approach to control the branching ratio via collaboration between vibrational and rotational excitation and will enrich the knowledge of the O + HO2 reaction in atmospheric chemistry and physics. [ABSTRACT FROM AUTHOR]

In the current work the first coherent set of differential cross section values for the natMg(p,p 0)natMg elastic scattering covering the E p,lab = 2700–4250 keV energy range is presented for 6 backscattering detection angles (120°, 130°, 140°, 150°, 160° and 170°). R-Matrix calculations were implemented using the AZURE 2.0 code [1] in an attempt to reproduce the obtained experimental data, whilst taking into account the 24Mg(p,p 1)24Mg reaction channel. Both results are suitable for EBS and other IBA applications and, furthermore, they form a basis for a future expansion of the current SigmaCalc [2] evaluation, once more experimental data become available. The measurements were performed in the 5.5 MV TN11 HV Tandem Accelerator and the high precision goniometer of N.C.S.R. 'Demokritos', Athens, Greece. The experimental and data analysis procedures are presented in detail, along with the process behind the implementation of the R-Matrix calculations. [ABSTRACT FROM AUTHOR]

The dependence of the Raman emission pulse energy by the hydrogen molecules on the ranging distance has been obtained at the laboratory Raman lidar with YAG–Nd laser radiation second harmonic at the 532 nm wavelength. This Raman lidar equation treatment results made it possible to calculate the Raman differential cross section for H2 molecules equal to (2.70 ± 0.43) × 10–30 cm2/sr in good agreement with other data. [ABSTRACT FROM AUTHOR]

Glauber's theory of multiple scattering is applied to the calculation of differential cross sections and polarization characteristics of particle scattering on light nuclei. All calculations were carried out within the framework of a reliable spectroscopic approach to nuclear reactions. Its essence consists in the use of nuclear models that reproduce practically all the spectroscopic characteristics of the nuclei under consideration. These include three-particle models of 6Li and 9Be nuclei, a many-particle shell model for nuclei with А = 6-14, and a particle-hole model of shells for nuclei with А = 15; three-body models for the 8Li and 9Li nuclei and a twoparticle αt-model for the 7Li nucleus. As our experience shows, when implementing the spectroscopic approach, when the dominant mechanism of the process is also established, one can not only obtain a description of the main characteristics of the process, but also rely on the predictive nature of the theory. In the present work, the results obtained are supplemented by calculations of the structure of the lowlying 5/2+ and 5/2- levels. This allows us to draw a general conclusion: the negative parity levels in 9Be, in which the valence neutron is in the p state, do not have a halo structure; at the same time, low-lying levels of positive parity, in which the valence neutron passes into the next (2s-1d) shell, have such. A special place is occupied by our recent direct evidence of the halo structure of low-lying excited states of the 9Be nucleus with quantum numbers 1/2+ and 3/2+. Within the framework of the ααn model of the 9Be nucleus, it was shown that a valence neutron with a high probability is located at 11 fm from the center of gravity of two α-particles, while in the 3/2 ground state this distance is several times smaller. The conclusions about the structure of low-lying levels of 9Be, obtained on the basis of the ααn model, are supported by calculations of p9Be scattering: only taking into account the halo structure makes it possible to reproduce the experimental data on inelastic scattering to positive parity levels. [ABSTRACT FROM AUTHOR]

The present research aims to measure the physical parameters affecting the differential cross-sections of PIGE reactions in the 45˚R beamline of the Van de Graaff accelerator. The calibration coefficient, the correlation between particle energy and NMR frequency, was determined using the relevant nuclear reactions. The absolute efficiency of the HPGe detector within the energy range of 60 to 10800 keV was obtained using the gamma rays of the standard radioactive sources and the cascade gamma rays due to the proton capture reactions. Two different techniques determined the solid angle of the charged particle detector. Using the backscattered particles' spectra, the beam current and the number of target nuclei were calculated. Also, the necessity for reducing the laboratory background and identifying the undesired peaks due to neutron-induced reactions was discussed. Under favorable experimental conditions, the systematic uncertainty for cross-section measurement was estimated to be less than 9%.

Reducing transistor size leads to an increase in the sensitivity to single event upsets (SEU) for CMOS integrated circuits designed for operation in irradiated conditions. Ionization energy losses for neutrons in the range 1–14 MeV is calculated based on the calculated spectra of primary knock-on silicon atoms. CMOS SRAM chips susceptibility to SEU under irradiation is estimated for various circuit topological sizes. [ABSTRACT FROM AUTHOR]

In the present work, the differential cross sections of the 12C(3He,p 0-2)14N and 12C(3He,α 0)11C nuclear reactions, as well as, the 12C(3He,3He 0)12C elastic scattering were determined at 5 detection angles (θ = 120°, 140°, 150°, 160°, 170°) covering the E lab = 2000–6000 keV energy range, with a 25 to 100 keV energy step. Benchmarking measurements were also performed using two different thick glassy carbon targets to validate the cross-section values obtained for the reactions. All measurements were carried out at the 4 MV Tandem Dynamitron Accelerator facility of the Central Unit for Ion Beams and Radionuclides of the Ruhr University Bochum in Bochum, Germany. The experimental, data analysis and benchmarking procedures are presented in detail. [ABSTRACT FROM AUTHOR]

A new global potential energy surface (PES) for the ground state of CaH 2 system was constructed by using neural network method. This paper provides a comprehensive discussion on the topographical characteristics of the PES and the spectral properties of stationary points. Furthermore, a time-dependent wave packet method was used to perform the dynamics studies on the Ca(4 s 2 1 S) + H 2 reaction based on the newly constructed PES. Some meaningful dynamics results are reported, including reaction probabilities, integral cross sections and differential cross sections. In addition, the reaction mechanism of the Ca(4 s 2 1 S) + H 2 reaction was discussed in detail. [ABSTRACT FROM AUTHOR]

We present, in the relativistic regime, the results of the study of elastic scattering of hydrogen atoms in its metastable state (2S-2S) by electron impact in the absence of a laser field. In the first calculation, semi-relativistic wave functions present hydrogen states. Dirac spinor describes the incident and scattered electrons. The condition Z α < < 1 of using Darwin wave functions has been verified. The second approach uses the exact relativistic calculation of this process. The relativistic case calculations converge to those of the non-relativistic case within the low electron velocity range. In the high incoming energy range, the Coulomb effect and exchange effect are neglected. We present the relativistic differential cross-section RDCS as a function of the final scattering angle for different energies of the incident electron. The effect of atomic number Z for hydrogenoid atoms on the cross-section is examined. [ABSTRACT FROM AUTHOR]

There is no general picture to describe the influences of reagent rotational excitation on the reaction, which proceeds via the tunnelling mechanism at collision energies far below the reaction barrier. Here we report a crossed beam study on the prototypical reaction of F + D2(v=0, j=0,1) → DF(v′) + D at collision energies between 44 and 164 cm−1 with the scheme of multichannel D-atom Rydberg tagging time-of-flight detection. Vibrational state resolved differential cross sections are obtained at v′=2, 3, 4 levels. The effects of reagent rotational excitation were investigated at an equivalent amount of total energy by precise tuning of translational energies. Compared with translation, the rotation of D2 is found to be more efficient to promote the title reaction. Profound differences introduced by rotation of D2 are also observed on the angular distribution and quantum state distribution of DF products. We hope the present work could provide an example for understanding the effects of reagent rotational excitation on the chemical reaction at energies that are much lower than the reaction barrier. [ABSTRACT FROM AUTHOR]

An optical model potential for neutron-antimony isotopes collision systems is obtained at the incident energies up to 200 MeV. Cross sections, angular distributions, energy spectra and double differential cross sections for neutron-induced reactions on 121Sb, 123Sb and natural Sb are consistently calculated and analyzed at incident energies below 20 MeV by using theoretical nuclear models for nuclear energy applications. The calculated results are compared with experimental data and the evaluated data from CENDL-3 and JENDL-4. [ABSTRACT FROM AUTHOR]

The differential cross section of the deuteron elastic scattering on oxygen was studied, experimentally, in the energy range of 1.5 – 2.5 MeV, in order for the theoretical study to be accomplished in the energy range 1.9–2.5 MeV for the scattering angles of 130°, 140°, 150°, 160° and 170°.The experiment was performed at the Tandem 5.5 MV Accelerator of the N.C.S.R. "Demokritos" in Athens, Greece. The theoretical study was accomplished in order to extend the pre-existing evaluation, which stopped at 1.98 MeV, up to 2.5 MeV. The used code implements the R-matrix theory along with optical model calculations. [ABSTRACT FROM AUTHOR]

Standardless PIGE analysis requires precise differential cross section values. In this research differential cross section data for proton-induced gamma-ray emission for 63Cu and 65Cu in the energy range 2000–3000 keV at 90◦ in the laboratory frame was measured. The research was carried out using the proton beam of the 3 MV Van de Graaff electrostatic accelerator of Nuclear Science and Technology Research Institute (NSTRI) in Tehran. The validity of present data was confirmed through thick target yield benchmarking procedure. The estimated systematic uncertainty is less than 9%. [ABSTRACT FROM AUTHOR]

This paper presents measurements of low energy electron scattering from pyridine. The low energy positron beamline at the Australian National University was used for these measurements, with a change in operational parameters allowing for the measurement of electron scattering processes. We have collected data for the low energy total cross section for electron scattering, as well as measurements of the differential cross sections for electrons up to 3 eV impact energy. The operation of the beamline will be briefly outlined and data are compared to R -matrix and Schwinger multichannel theoretical calculations, as well as previous experimental data. [ABSTRACT FROM AUTHOR]

In this paper we study the problem of fermions scattering by the field of a magnetic dipole in Minkowski space-time. The amplitude and differential cross section for scattering of massive fermions are obtained using the exact solution of the Dirac equation written in the helicity basis. We found that the most probable transitions are those that scatter the fermions perpendicular to the direction of the magnetic field and we consider only the transverse momenta in our analysis. The differential cross section behavior in terms of scattering angle and energy is graphically analysed and we perform a comparative study with the Coulomb scattering. [ABSTRACT FROM AUTHOR]

Darwin wave functions, as a quasi-relativistic states describing the hydrogen atom, are used to calculate the differential cross section for inelastic excitation of 2p state hydrogen atom by electronic impact in various electron energy regions. The use of these wave functions gives interesting results so long as the condition z / c ≪ 1 is verified. The incident and scattered electrons are described by a free Dirac spinor. Relativistic spin effects are taken into account explicitly via the spinorial part. The computed results, in the first Born approximation, are given and discussed by analogy with the non-relativistic regime and the relativistic 1 s → 2 s . They are also compared with some other available theoretical models and with the experimental results of Williams (J Phys B At Mol Phys 14:1197, 1981). The general rule of optically allowed and forbidden transitions is also respected. [ABSTRACT FROM AUTHOR]

The time-dependent wave packet method has been employed to calculate the state-to-state integral cross sections and differential cross sections (DCSs) for three initial states of the title reaction on the recently constructed neural network potential energy surface. It is found that the product HBr(υ′ = 2, 3, 4) states have the dominated population in the entire energy region considered here, indicating an inverted HBr vibrational state distribution. More than half of the available energy ends up as product internal motion, and most of which goes into the vibrational motion. Our calculations show that initial rotational excitation of Br2 has little effect on the product ro-vibrational state distributions and DCSs of the reaction. While the initial vibrational excitation has some influences. The initial vibrational excitation to υ0 = 5 obviously enhance the product vibrational excitation in the low energy region. The DCSs for collision energy up to 0.5 eV at the ground and rotationally excited state are peaked in the backward direction, but the width of the angular distribution increases considerably with the increase of collision energy. For the vibrationally excited state, the DCSs are rather complicated with some strong forward scattering peaks for highly vibrationally excited products. [ABSTRACT FROM AUTHOR]

The differential cross section values of the natSi(p,p 0) elastic scattering were determined in the energy range of E p,lab = 3000–5000 keV at 6 backscattering detection angles (120°, 130°, 140°, 1 50°, 160° and 170°). The target was a self-supported thin Si 3 N 4 foil. In addition, a thick crystalline silicon wafer was irradiated on its unpolished side with protons at energies E p,lab = 3200, 3400, 3600, 3850, 4100, 4300, 4500, 4740, 5000 keV, in order to validate the results of the first experiment. On top of both targets a thin layer of 197Au was evaporated for normalization purposes. Both measurements were performed in parallel, using the 5.5 MV TN11 HV Tandem Accelerator and the high precision goniometer of N.C.S.R. 'Demokritos', Athens, Greece. The experimental and data analysis processes are presented in detail, as well as, comparisons between the obtained differential cross sections and already existing datasets in literature, along with the benchmarking results. [ABSTRACT FROM AUTHOR]

• The bremsstrahlung DDCSs are measured at 90° with 5–25 keV electrons for C and Al. • The bremsstrahlung photons are measured down to 1–2 keV. • The measured DDCSs are compared with OB and SA theories. • It is found that the discrepancies between the measured data and the theories exist. Absolute measurements of the bremsstrahlung double differential cross sections (DDCSs) for photons radiated at 90° generated by the collisions of 5–25 keV electrons and down to 1–2 keV photon energy with two thin targets C (Z = 6) and Al (Z = 13) are presented. A parallelized version of the PENELOPE Monte Carlo program has been used to correct the effects of electron multiple scattering and the backscattering from the target substrate on the experimental results. Comparisons between the experiments and the theories reveal some discrepancies between the measured data and the theoretical bremsstrahlung predictions. [ABSTRACT FROM AUTHOR]

Differential cross sections for gamma-ray emission from the 107Ag (p, p′γ 3-0)107Ag and 109Ag (p, p′γ 3-0)109Ag reactions in the proton energy range 1200–2700 keV were measured at 90⁰ in the laboratory frame. In addition, differential cross sections for gamma-ray emission from the 107Ag(p, p′γ 4-0)107Ag and 109Ag(p,p′γ 4-0)109Ag reactions in the proton energy range 1310–2700 keV and 1330–2700 keV in the mentioned condition. The measurements were performed using the proton beam of the 3 MV Van de Graaff electrostatic accelerator of Nuclear Science and Technology Research Institute (NSTRI) in Tehran. Besides, the validity of the measured differential cross sections was verified through comparison between calculated thick target yields deduced from present work excitation curve and experimental thick target yield data available from literature. The overall systematic uncertainty of the measured values was estimated to be less than 8%. [ABSTRACT FROM AUTHOR]

The reaction between O(3P) and H2O is of significance in combustion, atmospheric and interstellar chemistry. Using an accurate full-dimensional potential energy surface (PES) for the lowest triplet state of the H2O2 system, the quasi-classical trajectory method is employed to run dynamical simulations between O(3P) and H2O at hyperthermal collision energies of 50–100 kcal mol−1, which may access the hydrogen abstraction channel OH + OH, the hydrogen elimination channel H + HO2 and the oxygen exchange channel O + H2O. The integral cross sections (ICSs), differential cross sections, product energy/state distributions and reaction mechanisms are studied for the channels leading to products OH + OH and H + HO2. [ABSTRACT FROM AUTHOR]

The dynamics studies of the Au+ + HD (v0 = 0, j0 = 0) → AuH+/AuD+ + D/H reaction are carried out using time-dependent quantum wave packet and quasi-classical trajectory (QCT) methods. Some meaningful dynamics properties are reported at state-to-state level of theory, such as reaction probability, integral cross section (ICS), and differential cross section (DCS). Furthermore, the ICSs of the two channels of the Au+ + HD reaction are compared with experimental data. Large discrepancies between theory and experiment are observed near the threshold, which can be attributed to the pseudopotential basis set used in the construction of potential energy surface. However, present QCT values are in general good agreement with experimental results as the collision energy above 4.0 eV. The DCSs results indicated that the insert complex-forming reaction mechanism dominates the reaction for these two channels. [ABSTRACT FROM AUTHOR]

[Display omitted] • The K(4p2P) + HD (v 0 = 0, 1, j 0 = 0) → KD/KH + H/D reaction is first studied by using time dependent wave packet method based on the non-adiabatic potential energy surface. Some meaningful dynamic properties such as reaction probability, integral cross section, differential cross section and rate constant are reported. • The isotope effect is discussed in this work. KH + D is the preferred product channel. • The forward biased differential cross sections reflect that the stripping mechanism dominates the reaction. Based on the non-adiabatic potential energy surface reported by Li et al. (Phys. Chem. Chem. Phys. 22 (2020) 16203–16214.), the dynamics calculations of the K(4p2P) + HD (v 0 = 0, 1, j 0 = 0) reaction were performed by using time-dependent wave packet method. A series of dynamics properties are calculated including reaction probabilities, integral cross sections (ICSs), differential cross sections (DCSs) and rate constants for both KH + D and KD + H product channels. The results show that KH + D is the preferred product channel. Additionally, we incorporated the effect of vibrational excitation of the reactant into our studies. The results indicate that vibrational excitation of the HD molecule significantly enhances reactivity, proving more effective than increasing the translational energy. The forward biased DCS results indicate that the direct abstraction mechanism dominates the reaction. [ABSTRACT FROM AUTHOR]

The values of the parameters ρ p p , σ tot p p and B p p extracted in the region of Coulomb-nuclear interference (CNI) in the ATLAS and TOTEM experiments at energy s = 13 TeV are studied based on the general expression for the Coulomb-nuclear amplitude. Due to the significant differences between these data, we undertake both their joint analysis and the retrieval of parameter values separately for each experiment. A significant incompatibility of these parameters published by the ATLAS and TOTEM experiments is shown. This is especially noticeable in the case of σ tot and the situation is similar to what once happened at the TEVATRON: the values of σ tot A T L A S with account of errors do not overlap with σ tot T O T E M. [ABSTRACT FROM AUTHOR]

In the current work the differential cross sections for the proton-induced 9Be(p,d 0)8Be and 9Be(p,α 0)6Li nuclear reactions (Q-values = 559 and 2125 keV respectively), as well as, the 9Be(p,p 0)9Be elastic scattering were measured for 6 backscattering detection angles (θ = 120°, 130°, 140°, 150°, 160° and 170°) covering the E p,lab = 300–3000 keV energy range with an energy step between 10 and 50 keV. The total estimated uncertainties of the determined cross-section values did not exceed 6.4 % for the elastic scattering, 7.0 % for the 9Be(p,α 0)6Li and 9.9 % for the 9Be(p,d 0)8Be reaction. Benchmarking measurements were also performed with a suitable thick target in order to validate the obtained cross-section values. The present experimental results constitute three coherent differential cross-section datasets suitable for IBA applications. The measurements were performed at the 4 MV Tandem Dynamitron Laboratory of the Ruhr University Bochum in Germany. The experimental, data analysis and benchmarking procedures are presented in detail. [ABSTRACT FROM AUTHOR]

In the present work, the scattering differential cross section has been investigated for ion-multi electron atoms collision in the charge transfer channel. For this purpose, an active electron model was implemented and the collision process was considered as a three-body impact in the high energy range. A semi-classical formalism was used with the eikonal distorted wave function to describe the system, and the first and second order scattering amplitude of the Brinkman-Kramers approximation was employed to calculate the differential cross section. In this work, the screening Coulomb Effect and the static potential were implemented to calculate the eikonal wave function. The differential cross section was calculated for Proton-Helium, Proton-Carbon, Proton-Neon and Proton-Argon impacts by using the static Brinkman-Kramers, screening Coulomb Brinkman-Kramers, the potential Brinkman-Kramers effect, and the second order static Brinkman-Kramers approximation. The findings were then compared with the available experimental and theoretical results.

A measurement of angular correlations in Drell–Yan lepton pairs via the ϕη⁎ observable is presented. This variable probes the same physics as the Z/γ⁎ boson transverse momentum with a better experimental resolution. The Z/γ⁎→e+e− and Z/γ⁎→μ+μ− decays produced in proton–proton collisions at a centre-of-mass energy of sqrts=7 TeV are used. The data were collected with the ATLAS detector at the LHC and correspond to an integrated luminosity of 4.6 fb−1. Normalised differential cross sections as a function of ϕη⁎ are measured separately for electron and muon decay channels. These channels are then combined for improved accuracy. The cross section is also measured double differentially as a function of ϕη⁎ for three independent bins of the Z boson rapidity. The results are compared to QCD calculations and to predictions from different Monte Carlo event generators. The data are reasonably well described, in all measured Z boson rapidity regions, by resummed QCD predictions combined with fixed-order perturbative QCD calculations or by some Monte Carlo event generators. The measurement precision is typically better by one order of magnitude than present theoretical uncertainties.