Andrew J Howard
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Explore the profile of Andrew J Howard including associated specialties, affiliations and a list of published articles.
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33
Citations
388
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Recent Articles
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Unwin J, Razmus W, Allum F, Harries J, Kumagai Y, Nagaya K, et al.
ACS Phys Chem Au
. 2024 Dec;
4(6):620-631.
PMID: 39634650
Time-resolved extreme ultraviolet spectroscopy was used to investigate photodissociation within the iodobenzene C-band. The carbon-iodine bond of iodobenzene was photolyzed at 200 nm, and the ensuing dynamics were probed at...
3.
Walmsley T, McManus J, Kumagai Y, Nagaya K, Harries J, Iwayama H, et al.
J Phys Chem A
. 2024 May;
128(22):4548-4560.
PMID: 38713032
We present results from a covariance ion imaging study, which employs extensive filtering, on the relationship between fragment momenta to gain deeper insight into photofragmentation dynamics. A new data analysis...
4.
Champenois E, List N, Ware M, Britton M, Bucksbaum P, Cheng X, et al.
Phys Rev Lett
. 2023 Oct;
131(14):143001.
PMID: 37862660
Directly imaging structural dynamics involving hydrogen atoms by ultrafast diffraction methods is complicated by their low scattering cross sections. Here we demonstrate that megaelectronvolt ultrafast electron diffraction is sufficiently sensitive...
5.
Gabalski I, Allum F, Seidu I, Britton M, Brenner G, Bromberger H, et al.
J Phys Chem Lett
. 2023 Aug;
14(31):7126-7133.
PMID: 37534743
Recent developments in X-ray free-electron lasers have enabled a novel site-selective probe of coupled nuclear and electronic dynamics in photoexcited molecules, time-resolved X-ray photoelectron spectroscopy (TRXPS). We present results from...
6.
Howard A, Britton M, Streeter Z, Cheng C, Forbes R, Reynolds J, et al.
Commun Chem
. 2023 Apr;
6(1):81.
PMID: 37106058
Filming atomic motion within molecules is an active pursuit of molecular physics and quantum chemistry. A promising method is laser-induced Coulomb Explosion Imaging (CEI) where a laser pulse rapidly ionizes...
7.
Cheng C, Frasinski L, Mogol G, Allum F, Howard A, Rolles D, et al.
Phys Rev Lett
. 2023 Mar;
130(9):093001.
PMID: 36930921
We extend covariance velocity map ion imaging to four particles, establishing cumulant mapping and allowing for measurements that provide insights usually associated with coincidence detection, but at much higher count...
8.
Howard A
Biochem Mol Biol Educ
. 2022 Nov;
51(1):39-43.
PMID: 36341545
Most textbooks and lecturers present Michaelis-Menten kinetics using the equation v = V [S]/(K + [S]). There are advantages to presenting this relationship in a slightly different form, namely v ...
9.
Gabalski I, Sere M, Acheson K, Allum F, Boutet S, Dixit G, et al.
J Chem Phys
. 2022 Nov;
157(16):164305.
PMID: 36319419
We have observed details of the internal motion and dissociation channels in photoexcited carbon disulfide (CS) using time-resolved x-ray scattering (TRXS). Photoexcitation of gas-phase CS with a 200 nm laser...
10.
McManus J, Walmsley T, Nagaya K, Harries J, Kumagai Y, Iwayama H, et al.
Phys Chem Chem Phys
. 2022 Sep;
24(37):22699-22709.
PMID: 36106844
We present results from an experimental ion imaging study into the fragmentation dynamics of 1-iodopropane and 2-iodopropane following interaction with extreme ultraviolet intense femtosecond laser pulses with a photon energy...