Musahid Ahmed

Photoelectron imaging of helium droplets.

Crossed beams study of the reaction 1CH2+C2H2-->C3H3+H.

Light scattering of ultrafine silica particles by VUV synchrotron radiation.

Synchrotron radiation based aerosol time-of-flight mass spectrometry for organic constituents.

Vacuum ultraviolet photoionization of C3.

Direct determination of the ionization energies of FeO and CuO with VUV radiation.

Elastic light scattering from nanoparticles by monochromatic vacuum-ultraviolet radiation.

Thermal vaporization of biological nanoparticles: fragment-free vacuum ultraviolet photoionization mass spectra of tryptophan, phenylalanine-glycine-glycine, and beta-carotene.

VUV photoelectron imaging of biological nanoparticles: ionization energy determination of nanophase glycine and phenylalanine-glycine-glycine.

Two-color visible/vacuum ultraviolet photoelectron imaging dynamics of Br2.

Energy-resolved photoionization of alkylperoxy radicals and the stability of their cations.

Vacuum-ultraviolet photoionization studies of the microhydration of DNA bases (guanine, cytosine, adenine, and thymine).

A combined experimental and computational study on the ionization energies of the cyclic and linear C3H isomers.

Ionization thresholds of small carbon clusters: tunable VUV experiments and theory.

Vacuum ultraviolet (VUV) photoionization of small water clusters.

Vacuum-ultraviolet (VUV) photoionization of small methanol and methanol-water clusters.

Direct determination of the ionization energies of PtC, PtO, and PtO2 with VUV radiation.

Experimental test of self-shielding in vacuum ultraviolet photodissociation of CO.

The multiplexed chemical kinetic photoionization mass spectrometer: a new approach to isomer-resolved chemical kinetics.

Vacuum-ultraviolet photoionization measurement and ab initio calculation of the ionization energy of gas-phase SiO2.

Experimental observation of guanine tautomers with VUV photoionization.

Imaging with mass spectrometry: a secondary ion and VUV-photoionization study of ion-sputtered atoms and clusters from GaAs and Au.

Mass-analyzed threshold ionization (MATI) spectroscopy of atoms and molecules using VUV synchrotron radiation.

Quantifying the reactive uptake of OH by organic aerosols in a continuous flow stirred tank reactor.

Tunable wavelength soft photoionization of ionic liquid vapors.

Determination of ionization energies of small silicon clusters with vacuum ultraviolet radiation.

Internal energies of ion-sputtered neutral tryptophan and thymine molecules determined by vacuum ultraviolet photoionization.

Chemical dynamics, molecular energetics, and kinetics at the synchrotron.

The effect of pi-stacking, H-bonding, and electrostatic interactions on the ionization energies of nucleic acid bases: adenine-adenine, thymine-thymine and adenine-thymine dimers.

Ionization of cytosine monomer and dimer studied by VUV photoionization and electronic structure calculations.

Spectroscopic signatures of proton transfer dynamics in the water dimer cation.

Laser desorption postionization mass spectrometry of antibiotic-treated bacterial biofilms using tunable vacuum ultraviolet radiation.

Electronic structure and spectroscopy of nucleic acid bases: ionization energies, ionization-induced structural changes, and photoelectron spectra.

Untangling the chemical evolution of Titan's atmosphere and surface--from homogeneous to heterogeneous chemistry.

Vacuum-ultraviolet photoionization and mass spectrometric characterization of lignin monomers coniferyl and sinapyl alcohols.

The direct observation of secondary radical chain chemistry in the heterogeneous reaction of chlorine atoms with submicron squalane droplets.

Brominated tyrosine and polyelectrolyte multilayer analysis by laser desorption vacuum ultraviolet postionization and secondary ion mass spectrometry.

The products of the thermal decomposition of CH3CHO.

Comparing Vacuum and Extreme Ultraviolet Radiation for Postionization of Laser Desorbed Neutrals from Bacterial Biofilms and Organic Fullerenes.

Desorption dynamics, internal energies, and imaging of organic molecules from surfaces with laser desorption and vacuum ultraviolet (VUV) photoionization.

A VUV photoionization study of the combustion-relevant reaction of the phenyl radical (C6H5) with propylene (C3H6) in a high temperature chemical reactor.

Ionization of dimethyluracil dimers leads to facile proton transfer in the absence of hydrogen bonds.

The effect of microhydration on ionization energies of thymine.

Oxygen isotope fractionation in the vacuum ultraviolet photodissociation of carbon monoxide: wavelength, pressure, and temperature dependency.

Thermal decomposition of CH(3)CHO studied by matrix infrared spectroscopy and photoionization mass spectroscopy.