A5046584937- Advanced Chemical Physics Studies
- Spectroscopy and Laser Applications
- Mass Spectrometry Techniques and Applications
- Atmospheric Ozone and Climate
- Atmospheric chemistry and aerosols
- Photochemistry and Electron Transfer Studies
- Atomic and Molecular Physics
- Spectroscopy and Quantum Chemical Studies
- Atomic and Subatomic Physics Research
- Photoreceptor and optogenetics research
- X-ray Spectroscopy and Fluorescence Analysis
- Nuclear physics research studies
- Multicomponent Synthesis of Heterocycles
- Cold Atom Physics and Bose-Einstein Condensates
- Diamond and Carbon-based Materials Research
- Atmospheric and Environmental Gas Dynamics
- Laser-Matter Interactions and Applications
- Radical Photochemical Reactions
- Electrochemical Analysis and Applications
- Quantum, superfluid, helium dynamics
- Ion-surface interactions and analysis
- Ionic liquids properties and applications
- Molecular Spectroscopy and Structure
- Laser-induced spectroscopy and plasma
Max Planck Institute for Nuclear Physics
2022-2025
Universidad Complutense de Madrid
2014-2024
We have momentum-analyzed electrons and recoil ions in triple coincidence with projectiles neutralized 300-keV <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:mrow><a:mi mathvariant="normal">S</a:mi><a:msup><a:mrow><a:mi mathvariant="normal">i</a:mi></a:mrow><a:mo>−</a:mo></a:msup><a:mo>+</a:mo><a:mi>Ar</a:mi></a:mrow></a:math> collisions. The experiment was performed at a cryogenic ion storage ring an in-ring reaction microscope. Differential momentum distributions for detachment...
The valence-shell dissociative ionization of methyl iodide is studied using electron ion coincidence spectroscopy in combination with synchrotron radiation, revealing a conical intersection between the ground and first excited states cation.
The photodissociation dynamics of the methyl iodide cation has been studied using velocity map imaging technique. A first laser pulse is used to ionize via a (2 + 1) REMPI scheme through 5pπ → 6p Rydberg state two-photon transition. produced CH3I+(X[combining tilde]2E3/2) ions are subsequently excited at several wavelengths between 242 and 260 nm. reported translational energy distributions for iodine present Boltzmann-type unstructured distribution low excitation energies as well recoiled...
The one and two-photon photodissociation dynamics of the methyl radical from 3s 3p<sub>z</sub> Rydberg states have been disentangled.
The photochemistry of the ethyl radical following excitation to 3p Rydberg state is investigated in a joint experimental and theoretical study.
We present the photoelectron spectroscopy of simplest Criegee intermediate, CH<sub>2</sub>OO, close to first ionization energy.
Chemical reaction dynamics and, particularly, photodissociation in the gas phase are generally studied using pump-probe schemes where a first laser pulse induces process under study and second one detects produced fragments. Providing an efficient detection of ro-vibrationally state-selected photofragments, resonance enhanced multiphoton ionization (REMPI) technique is, without question, most popular approach used for probe step, while non-resonant (NRMPI) products is scarce. The main goal...
The photodissociation dynamics of bromochloromethane (CH2BrCl) have been investigated at the maximum first absorption band, excitation wavelengths 203 and 210 nm, using slice imaging technique in combination with a probe detection bromine-atom fragments, Br(2P3/2) Br*(2P1/2), via (2 + 1) resonance enhanced multiphoton ionization. Translational energy distributions angular reported for both Br*(2P1/2) fragments show two contributions channel single contribution channel. High level ab initio...
The photodissociation dynamics of the ethyl radical following excitation into 3s and 3p Rydberg states are revisited in a joint experimental theoretical study. Two different methods to produce radical, pyrolysis situ photolysis, employed order modify initial ro-vibrational energy distribution characterizing beam. H-atom velocity map images at 243 nm 201 presented discussed along with ab initio potential curves focussing on bridged C2v geometry. reported results show that state is insensitive...
Ion imaging is applied to disentangle the selective bond cleavage in photodissociation of bromoiodomethane from two first absorption bands.
A prompt site-specific hydrogen-atom elimination from the α-carbon atom is reported in photodissociation of several alkyl radicals at 201 nm and discussed terms their chemical structure role vibrational promoting modes.
We have measured triple differential momentum distributions for electron detachment in collisions of 30- and 300-keV anions (<a:math xmlns:a="http://www.w3.org/1998/Math/MathML"><a:msup><a:mrow><a:mi mathvariant="normal">C</a:mi></a:mrow><a:mo>−</a:mo></a:msup></a:math> <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"><c:mrow><c:mi mathvariant="normal">S</c:mi><c:msup><c:mrow><c:mi mathvariant="normal">i</c:mi></c:mrow><c:mo>−</c:mo></c:msup></c:mrow></c:math>) with atoms molecules (He,...
The photodissociation dynamics and stereodynamics of ethyl iodide from the origin second absorption B-band have been investigated combining pulsed slicFe imaging with resonance enhanced multiphoton ionization (REMPI) detection all fragments, I(2P3/2), I*(2P1/2) C2H5. atom action spectrum recorded as a function excitation wavelength permits one to identify select 0 this band at 201.19 nm (49 704 cm-1). Translational energy distributions angular for fragments semiclassical Dixon's bipolar...
Photodynamics of the ethyl radical from highly excited Rydberg states studied using velocity map imaging and ab initio calculations.
The C–C bond dissociation channel of the ethyl (CH3–CH2) radical is investigated at 197.4, 199.98 and 201 nm by velocity map imaging resonance enhanced multiphoton ionisation (REMPI) detection produced CH3 fragments. On light high-level ab initio calculations performed in this work, up to four pathways are identified leading, respectively, ground state radicals correlation with CH2 fragments first electronic states. major pathway associated threshold over an exit barrier located point a...
The role of promoting and spectator modes vs energy randomization in nonadiabatic dynamics is interrogated the photodissociation methyl mercaptan, CH3SH, dimethyl sulfide, CH3SCH3 or DMS, second absorption band. primary CH3(ν) radicals produced dissociation both systems at 210 nm have been resonantly detected slice-imaging experiments, corresponding translational angular distributions obtained. stereodynamical information provided by Dixon's bipolar moments conjunction with partitioning...
VUV photoionization of the CHnI radicals (with n = 0, 1, and 2) is investigated by means synchrotron radiation coupled with a double imaging photoion-photoelectron coincidence spectrometer. Photoionization efficiencies threshold photoelectron spectra (TPES) for photon energies ranging between 9.2 12.0 eV are reported. An adiabatic ionization energy (AIE) 8.334 ± 0.005 obtained CH2I, which in good agreement previous results [8.333 0.015 eV, Sztáray J. Chem. Phys. 2017, 147, 013944], while CI...
The photodissociation dynamics and photofragment alignment of bromoiodomethane (CH2BrI) have been studied at 193 nm using a double experimental theoretical approach. In addition, the ultraviolet (UV)-vacuum (VUV) absorption spectrum gas phase CH2BrI has measured in photon energy range 5-11 eV VUV Fourier transform spectrometer (FTS) beamline DESIRS synchrotron SOLEIL facility. slice imaging technique combination with resonance enhanced multiphoton ionization (REMPI) detection Br(2PJ) I(2PJ)...