Zap Energy’s Post

In this recent paper, the authors study dissociative electron attachment to linear carbonyl sulfide using experimental techniques. In addition to the time-of-flight-based velocity map imaging method, they use Q-Chem's multistate CAP-EOM-CC method to model the electronic structure, confirming the presence of bending vibrations associated with the electron attachment as well as Renner–Teller vibronic splittings, aiding in their interpretation of the experimental data. "Observation of Renner–Teller and predissociation coupled vibronic intensity borrowing in dissociative electron attachment to OCS" Narayan Kundu, Dhananjay Nandi. J. Chem. Phys. https://lnkd.in/gAuuZxS8

Our joint experimental and simulation study of the photodissociation of ammonia with Nanna Holmgaard List, Elio Champenois and Todd Martinez is now out in PRL! We saw both the signature of the disappearance of one of the hydrogens and the corresponding electronic structure changes in our experimental results from ultrafast electron diffraction. Our analysis is based on comparisons with ab initio simulations of both the photodissociation dynamics and the resulting electron diffraction signatures. Thanks everybody on the team for your work on this really fun collaboration: Matthew Ware PhD. Xinxin Cheng James Cryan Ruaridh Forbes Ian Gabalski Kareem Hegazy Fuhao Ji MING-FU LIN (林明甫) Pedro Nunes Xiaozhe Shen Xijie Wang

We've just published "Axisymmetric hybrid Vlasov equilibria with applications to tokamak plasmas", Plasma Phys. Control. Fusion 66, 065016 (2024). In this research we construct tokamak relevant equilibria using a hybrid Vlasov model with massless fluid electrons. We also present an analytic method for reconstructing the ion distribution function from macroscopic equilibrium properties such as the particle density profile. https://lnkd.in/dm3A6GKN

Searching for the elusive neutrino takes on many forms. Detectors consisting of many tons of gallium are used in several experiments because neutrino interactions can occur on the stable gallium-71 (71Ga) nucleus and transform it into a radioactive isotope of germanium (71Ge) with an 11-day half-life that can then be observed with traditional radiation detectors.

Searching for the elusive neutrino takes on many forms. Detectors consisting of many tons of gallium are used in several experiments because neutrino interactions can occur on the stable gallium-71 (71Ga) nucleus and transform it into a radioactive isotope of germanium (71Ge) with an 11-day half-life that can then be observed with traditional radiation detectors.

Published at the very end of 2023: The semi-analytical study carried out by Emilien Denoual et al. (CEA) unveils the origin of energetic terahertz (multi-mJ) radiation in relativistic laser-solid interactions. What is new? The EM fields emitted by electrons leaving the plasma (coherent transition radiation) then returning to the target (synchrotron radiation) due to the strong charge separation field are, for the first time, treated coherently through a unified kinetic model and their angular spectra are detailed for various laser-plasma parameters. It is shown that their destructive interference should render the electrons escaping from the plasma contribute mainly to the measured radiation. THz emission associated with plasma expansion and ion acceleration at later times is also fully modeled analytically and shown to deliver much lower energy yields. Have a pleasant reading: https://lnkd.in/evNSiXgV And Happy New Year! 🎄 🎉 🎊

Exciting news! In collaboration with Kyoto University, our recent paper on neutron sources based on fusion systems was recently published in the Journal of Fusion Science and Technology. The article titled "Influence of the Hydrogen Isotope Affinity of the Cathode Coating Material on the Neutron Production Rate in the Glow Discharge-Type Fusion Neutron Source" explores the impact of cathode coating material on neutron production rates. https://lnkd.in/etqda--E

In a recent article, Gale et al. [1] discussed that the adaptation of living organisms to higher levels of ionizing radiation, when they moved from water to land, may be due to the translocation of hematopoietic stem cells to the bone marrow. Gale et al. explore the possibility that this translocation occurred as an evolutionary response to increased environmental radiation exposures. The authors of this study emphasize that the first organisms to transition to a partially or fully terrestrial lifestyle faced the challenge of losing the protective effects of the water column. 

Advances in neutron imaging create opportunities for low power research reactors Neutron imaging is a non-invasive technique for examining internal structures that is carried out using research reactors or accelerator-based neutron sources. It is an amazing tool, with endless possibilities for scientific and industrial research and development, as well as for forensics and the study of cultural artefacts. https://lnkd.in/d3rMFDhF