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We report a computational study of the anion states of the resveratrol (RV) and resorcinol (RS) molecules, also investigating dissociative electron attachment (DEA) pathways. RV has well known beneficial effects in human health, and its…

Atomic Physics · Physics 2022-11-08 Ely G. F. de Miranda , Lucas M. Cornetta , Márcio T. do N. Varella

Experimental cross sections for m-fold photodetachment (m=2-5) of oxygen anions via K-shell excitation and ionization were measured in the photon-energy range of 525-1500 eV using the photon-ion merged-beams technique at a synchrotron light…

Theoretical investigation of the dissociative recombination (DR) of NeH+ with low-energy electrons in the regime where the process occurs without direct potential energy curve crossings is presented. The calculations are performed using…

Atomic and Molecular Clusters · Physics 2025-09-09 Riyad Hassaine , Janos Zsolt Mezei , Dahbia Talbi , Jonathan Tennyson , Ioan F. Schneider

Dissociative electron attachment, that is, the cleavage of chemical bonds induced by low-energy electrons, is difficult to model with standard quantum-chemical methods because the involved anions are not bound but subject to autodetachment.…

Chemical Physics · Physics 2022-10-03 Jerryman A. Gyamfi , Thomas -C. Jagau

We investigate the LiF spectrum up to $7800$ cm$^{-1}$ above the first dissociation limit. The ab initio calculations of the adiabatic potentials and other molecular functions are performed in a wide range of interatomic separations,…

Atomic Physics · Physics 2025-12-03 V. G. Ushakov , A. Yu. Ermilov , E. S. Medvedev

The formation of $\mbox{O}_2$ by radiative association and by inverse predissociation of ground state oxygen atoms is studied using quantum-mechanical methods. Cross sections, emission spectra, and rate coefficients are presented and…

chem-ph · Physics 2008-02-03 J. F. Babb , A. Dalgarno

Triatomic molecule RaOH combines the advantages of laser-coolability and the spectrum with close opposite-parity doublets. This makes it a promising candidate for experimental study of the $\mathcal{P}$,$\mathcal{T}$-violation. Previous…

Atomic Physics · Physics 2021-03-17 Anna Zakharova , Alexander Petrov

Using the Constrained Path Monte Carlo (CPMC) method, we simulated the two-dimensional, three-band Hubbard model to study pairing, charge, and spin correlations as a function of electron and hole doping and the Coulomb repulsion $V_{pd}$…

Strongly Correlated Electrons · Physics 2009-10-31 Z. B. Huang , H. Q. Lin , J. E. Gubernatis

Calculations of the lowest valence {\pi}* as well as the 3s and higher energy 3p{\sigma} Rydberg excited states of the CO2 molecule are carried out using density functionals with variational optimization of the orbitals, an approach…

Chemical Physics · Physics 2026-04-08 Darío Barreiro-Lage , Gianluca Levi , Hannes Jonssón , Thanja Lamberts

The article presents calculated dissociative recombination (DR) rate coefficients for H+3 . The previous theoretical work on H+3 was performed using the adiabatic hyperspherical approximation to calculate the target ion vibrational states…

Atomic Physics · Physics 2007-08-22 Samantha Fonseca dos Santos , Viatcheslav Kokoouline , Chris H. Greene

We perform high-resolution measurements of momentum distribution on Rb$^{n+}$ recoil ions up to charge state $n=4$, where laser-cooled rubidium atoms are ionized by femtosecond elliptically polarized lasers with the pulse duration of 35 fs…

A quantitative theoretical study of the dissociative recombination of SH$^+$ with electrons has been carried out. Multireference, configuration interaction calculations were used to determine accurate potential energy curves for SH$^+$ and…

Instrumentation and Methods for Astrophysics · Physics 2024-05-31 D. O. Kashinski , D. Talbi , A. P. Hickman , O. E. Di Nallo , F. Colboc , K. Chakrabarti , I. F. Schneider , J. Zs Mezei

We theoretically explore photoassociation by Adiabatic Passage of two colliding cold ^{85}Rb atoms in an atomic trap to form an ultracold Rb_2 molecule. We consider the incoherent thermal nature of the scattering process in a trap and show…

Quantum Physics · Physics 2009-11-13 Evgeny A. Shapiro , Moshe Shapiro , Avi Pe'er , Jun Ye

We analyze reactive collisions of a single Ba$^+$ ion in contact with an ultracold gas of Rb atoms at low three-body collision energies of 2.2(9) mK$\times k_{\mathrm{B}}$. Mapping out the Ba$^+$ loss rate dependence on the Rb atom density…

Atomic Physics · Physics 2016-09-14 Artjom Krükow , Amir Mohammadi , Arne Härter , Johannes Hecker Denschlag

Using microwave detected, microwave-optical double resonance, we have measured the homogeneous linewidths of individual rovibrational transitions in the \~A state of NH3, NH2D, NHD2, and ND3. We have used this excited state spectroscopic…

The adiabatic connection curve of density functional theory (DFT) is accurately calculated beyond the physical interaction strength for Hooke's atom, two interacting electrons in a harmonic well potential. Extrapolation of the accurate…

Chemical Physics · Physics 2007-05-23 R. J. Magyar , W. Terilla , K. Burke

We investigate, by means of first-principles calculations, structural and transport properties of junctions made of symmetric dithiolated molecules placed between Au electrodes. As the electrodes are pulled apart, we find that it becomes…

Materials Science · Physics 2015-06-25 Ronaldo J. C. Batista , Pablo Ordejón , Hélio Chacham , Emilio Artacho

Supported vanadia catalysts are modeled within the cluster DFT approach to get an insight into the mechanism in which the support affects the activity of vanadia in the oxidation processes. The energy of the V=O group dissociation chosen as…

Materials Science · Physics 2018-03-29 Viktor Kovalskii , Igor Zilberberg

The lowest-lying states of LiH have been widely used to develop and calibrate many different methods in quantum mechanics. In this paper we show that the electron-transfer processes occurring in these two states are a difficult test for…

Dissociative recombination of N$_2$H$^+$ is explored in a two-step theoretical study. In a first step, a diatomic (1D) rough model with frozen NN bond and frozen angles is adopted, in the framework of the multichannel quantum defect theory…

Instrumentation and Methods for Astrophysics · Physics 2023-08-16 J. Zs Mezei , M. A. Ayouz , A. Orbán , A. Abdoulanziz , D. Talbi , D. O. Kashinski , E. Bron , V. Kokoouline , I. F. Schneider
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