LIVIVO - Search results -

Search results

Result 1 - 10 of total 35

Search options

Article ; Online: Efficient generation of the 7th harmonic of Ti:sapphire (114.6 nm) vacuum ultraviolet pulses with 60 fs duration by non-collinear four-wave mixing in argon.

Forbes, Ruaridh / Hockett, Paul / Lausten, Rune

Optics letters

2021 Volume 47, Issue 10, Page(s) 2410–2413

Abstract: The recent advances in femtosecond vacuum UV (VUV) pulse generation, pioneered by the work of Noack et al., has enabled new experiments in ultrafast time-resolved spectroscopy. Expanding on this work, we report the generation of 60 fs VUV pulses at the ... ...

Abstract	The recent advances in femtosecond vacuum UV (VUV) pulse generation, pioneered by the work of Noack et al., has enabled new experiments in ultrafast time-resolved spectroscopy. Expanding on this work, we report the generation of 60 fs VUV pulses at the 7th harmonic of Ti:sapphire with more than 50 nJ of pulse energy at a repetition rate of 1 kHz. The 114.6 nm pulses are produced using non-collinear four-wave difference-frequency mixing in argon. The non-collinear geometry increases the phase-matching pressure, and results in a conversion efficiency of ∼10
Language	English
Publishing date	2021-10-19
Publishing country	United States
Document type	Journal Article
ISSN	1539-4794
ISSN (online)	1539-4794
DOI	10.1364/OL.457070
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Auger electron angular distributions following excitation or ionization from the Xe 3d and F 1s levels in xenon difluoride.

Forbes, Ruaridh / Hockett, Paul / Powis, Ivan / Bozek, John D / Pratt, Stephen T / Holland, David M P

Physical chemistry chemical physics : PCCP

2022 Volume 24, Issue 3, Page(s) 1367–1379

Abstract: Linearly polarized synchrotron radiation has been used to record polarization dependent, non-resonant Auger electron spectra of ... ...

Abstract	Linearly polarized synchrotron radiation has been used to record polarization dependent, non-resonant Auger electron spectra of XeF
Language	English
Publishing date	2022-01-19
Publishing country	England
Document type	Journal Article
ZDB-ID	1476244-4
ISSN	1463-9084 ; 1463-9076
ISSN (online)	1463-9084
ISSN	1463-9076
DOI	10.1039/d1cp04797c
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Multiparticle Cumulant Mapping for Coulomb Explosion Imaging.

Cheng, Chuan / Frasinski, Leszek J / Moğol, Gönenç / Allum, Felix / Howard, Andrew J / Rolles, Daniel / Bucksbaum, Philip H / Brouard, Mark / Forbes, Ruaridh / Weinacht, Thomas

Physical review letters

2023 Volume 130, Issue 9, Page(s) 93001

Abstract: 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 rates. Without correction, a ... ...

Abstract	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 rates. Without correction, a fourfold covariance analysis is contaminated by the pairwise correlations of uncorrelated events, but we have addressed this with the calculation of a full cumulant, which subtracts pairwise correlations. We demonstrate the approach on the four-body breakup of formaldehyde following strong field multiple ionization in few-cycle laser pulses. We compare Coulomb explosion imaging for two different pulse durations (30 and 6 fs), highlighting the dynamics that can take place on ultrafast timescales. These results have important implications for Coulomb explosion imaging as a tool for studying ultrafast structural changes in molecules, a capability that is especially desirable for high-count-rate x-ray free-electron laser experiments.
Language	English
Publishing date	2023-02-24
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.130.093001
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Bonn / Germany

Z 4' 58/153: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Ultrafast Molecular Frame Quantum Tomography.

Morrigan, Luna / Neville, Simon P / Gregory, Margaret / Boguslavskiy, Andrey E / Forbes, Ruaridh / Wilkinson, Iain / Lausten, Rune / Stolow, Albert / Schuurman, Michael S / Hockett, Paul / Makhija, Varun

Physical review letters

2023 Volume 131, Issue 19, Page(s) 193001

Abstract: We develop and experimentally demonstrate a methodology for a full molecular frame quantum tomography (MFQT) of dynamical polyatomic systems. We exemplify this approach through the complete characterization of an electronically nonadiabatic wave packet ... ...

Abstract	We develop and experimentally demonstrate a methodology for a full molecular frame quantum tomography (MFQT) of dynamical polyatomic systems. We exemplify this approach through the complete characterization of an electronically nonadiabatic wave packet in ammonia (NH_{3}). The method exploits both energy and time-domain spectroscopic data, and yields the lab frame density matrix (LFDM) for the system, the elements of which are populations and coherences. The LFDM fully characterizes electronic and nuclear dynamics in the molecular frame, yielding the time- and orientation-angle dependent expectation values of any relevant operator. For example, the time-dependent molecular frame electronic probability density may be constructed, yielding information on electronic dynamics in the molecular frame. In NH_{3}, we observe that electronic coherences are induced by nuclear dynamics which nonadiabatically drive electronic motions (charge migration) in the molecular frame. Here, the nuclear dynamics are rotational and it is nonadiabatic Coriolis coupling which drives the coherences. Interestingly, the nuclear-driven electronic coherence is preserved over longer timescales. In general, MFQT can help quantify entanglement between electronic and nuclear degrees of freedom, and provide new routes to the study of ultrafast molecular dynamics, charge migration, quantum information processing, and optimal control schemes.
Language	English
Publishing date	2023-11-24
Publishing country	United States
Document type	Journal Article
ZDB-ID	208853-8
ISSN	1079-7114 ; 0031-9007
ISSN (online)	1079-7114
ISSN	0031-9007
DOI	10.1103/PhysRevLett.131.193001
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Bonn / Germany

Z 4' 58/153: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Filming enhanced ionization in an ultrafast triatomic slingshot.

Howard, Andrew J / Britton, Mathew / Streeter, Zachary L / Cheng, Chuan / Forbes, Ruaridh / Reynolds, Joshua L / Allum, Felix / McCracken, Gregory A / Gabalski, Ian / Lucchese, Robert R / McCurdy, C William / Weinacht, Thomas / Bucksbaum, Philip H

Communications chemistry

2023 Volume 6, Issue 1, Page(s) 81

Abstract: 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 many electrons from a molecule, causing the ... ...

Abstract	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 many electrons from a molecule, causing the remaining ions to undergo Coulomb repulsion. The ion momenta are used to reconstruct the molecular geometry which is tracked over time (i.e., filmed) by ionizing at an adjustable delay with respect to the start of interatomic motion. Results are distorted, however, by ultrafast motion during the ionizing pulse. We studied this effect in water and filmed the rapid "slingshot" motion that enhances ionization and distorts CEI results. Our investigation uncovered both the geometry and mechanism of the enhancement which may inform CEI experiments in many other polyatomic molecules.
Language	English
Publishing date	2023-04-27
Publishing country	England
Document type	Journal Article
ZDB-ID	2929562-2
ISSN	2399-3669 ; 2399-3669
ISSN (online)	2399-3669
ISSN	2399-3669
DOI	10.1038/s42004-023-00882-w
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: Single- and multi-photon-induced ultraviolet excitation and photodissociation of CH

Ziaee, Farzaneh / Borne, Kurtis / Forbes, Ruaridh / P, Kanaka Raju / Malakar, Yubaraj / Kaderiya, Balram / Severt, Travis / Ben-Itzhak, Itzik / Rudenko, Artem / Rolles, Daniel

Physical chemistry chemical physics : PCCP

2023 Volume 25, Issue 14, Page(s) 9999–10010

Abstract: The UV-induced photodissociation dynamics of iodomethane ( ... ...

Abstract	The UV-induced photodissociation dynamics of iodomethane (CH
Language	English
Publishing date	2023-04-05
Publishing country	England
Document type	Journal Article
ZDB-ID	1476244-4
ISSN	1463-9084 ; 1463-9076
ISSN (online)	1463-9084
ISSN	1463-9076
DOI	10.1039/d3cp00498h
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Article ; Online: A quantum molecular movie: polyad predissociation dynamics in the VUV excited 3pσ

Makhija, Varun / Boguslavskiy, Andrey E / Forbes, Ruaridh / Veyrinas, Kevin / Wilkinson, Iain / Lausten, Rune / Schuurman, Michael S / Grant, Edward R / Stolow, Albert

Faraday discussions

2021 Volume 228, Page(s) 191–225

Abstract: The optical formation of coherent superposition states, a wavepacket, can allow the study of zeroth-order states, the evolution of which exhibit structural and electronic changes as a function of time: this leads to the notion of a molecular movie. ... ...

Abstract	The optical formation of coherent superposition states, a wavepacket, can allow the study of zeroth-order states, the evolution of which exhibit structural and electronic changes as a function of time: this leads to the notion of a molecular movie. Intramolecular vibrational energy redistribution, due to anharmonic coupling between modes, is the molecular movie considered here. There is no guarantee, however, that the formed superposition will behave semi-classically (e.g. Gaussian wavepacket dynamics) or even as an intuitively useful zeroth-order state. Here we present time-resolved photoelectron spectroscopy (TRPES) studies of an electronically excited triatomic molecule wherein the vibrational dynamics must be treated quantum mechanically and the simple picture of population flow between coupled normal modes fails. Specifically, we report on vibronic wavepacket dynamics in the zeroth-order 3pσ2Σu Rydberg state of NO2. This wavepacket exemplifies two general features of excited state dynamics in polyatomic molecules: anharmonic multimodal vibrational coupling (forming polyads); nonadiabatic coupling between nuclear and electronic coordinates, leading to predissociation. The latter suggests that the polyad vibrational states in the zeroth-order 3p Rydberg manifold are quasi-bound and best understood to be scattering resonances. We observed a rapid dephasing of an initially prepared 'bright' valence state into the relatively long-lived 3p Rydberg state whose multimodal vibrational dynamics and decay we monitor as a function of time. Our quantum simulations, based on an effective spectroscopic Hamiltonian, describe the essential features of the multimodal Fermi resonance-driven vibrational dynamics in the 3p state. We also present evidence of polyad-specificity in the state-dependent predissociation rates, leading to free atomic and molecular fragments. We emphasize that a quantum molecular movie is required to visualize wavepacket dynamics in the 3pσ2Σu Rydberg state of NO2.
Language	English
Publishing date	2021-02-24
Publishing country	England
Document type	Journal Article
ISSN	1364-5498
ISSN (online)	1364-5498
DOI	10.1039/d0fd00128g
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Multi-Particle Three-Dimensional Covariance Imaging: "Coincidence" Insights into the Many-Body Fragmentation of Strong-Field Ionized D

Allum, Felix / Cheng, Chuan / Howard, Andrew J / Bucksbaum, Philip H / Brouard, Mark / Weinacht, Thomas / Forbes, Ruaridh

The journal of physical chemistry letters

2021 Volume 12, Issue 34, Page(s) 8302–8308

Abstract: We demonstrate the applicability of covariance analysis to three-dimensional velocity-map imaging experiments using a fast time stamping detector. Studying the photofragmentation of strong-field doubly ionized ... ...

Abstract	We demonstrate the applicability of covariance analysis to three-dimensional velocity-map imaging experiments using a fast time stamping detector. Studying the photofragmentation of strong-field doubly ionized D
Language	English
Publishing date	2021-08-24
Publishing country	United States
Document type	Journal Article
ISSN	1948-7185
ISSN (online)	1948-7185
DOI	10.1021/acs.jpclett.1c02481
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Vacuum Ultraviolet Excited State Dynamics of the Smallest Ketone: Acetone.

Forbes, Ruaridh / Neville, Simon P / Larsen, Martin A B / Röder, Anja / Boguslavskiy, Andrey E / Lausten, Rune / Schuurman, Michael S / Stolow, Albert

The journal of physical chemistry letters

2021 Volume 12, Issue 35, Page(s) 8541–8547

Abstract: We combined tunable vacuum-ultraviolet time-resolved photoelectron spectroscopy (VUV-TRPES) with high-level quantum dynamics simulations to disentangle multistate Rydberg-valence dynamics in acetone. A femtosecond 8.09 eV pump pulse was tuned to the ... ...

Abstract	We combined tunable vacuum-ultraviolet time-resolved photoelectron spectroscopy (VUV-TRPES) with high-level quantum dynamics simulations to disentangle multistate Rydberg-valence dynamics in acetone. A femtosecond 8.09 eV pump pulse was tuned to the sharp origin of the A
Language	English
Publishing date	2021-08-31
Publishing country	United States
Document type	Journal Article
ISSN	1948-7185
ISSN (online)	1948-7185
DOI	10.1021/acs.jpclett.1c02612
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Valence shell electronically excited states of norbornadiene and quadricyclane.

Cooper, Joseph C / Holland, David M P / Ingle, Rebecca A / Bonanomi, Matteo / Faccialà, Davide / De Oliveira, Nelson / Abid, Abdul R / Bachmann, Julien / Bhattacharyya, Surjendu / Borne, Kurtis / Bosch, Michael / Centurion, Martin / Chen, Keyu / Forbes, Ruaridh J G / Lam, Huynh V S / Odate, Asami / Rudenko, Artem / Venkatachalam, Anbu S / Vozzi, Caterina /

Wang, Enliang / Weber, Peter M / Ashfold, Michael N R / Kirrander, Adam / Rolles, Daniel

The Journal of chemical physics

2024 Volume 160, Issue 6

Abstract: The absolute photoabsorption cross sections of norbornadiene (NBD) and quadricyclane (QC), two isomers with chemical formula C7H8 that are attracting much interest for solar energy storage applications, have been measured from threshold up to 10.8 eV ... ...

Abstract	The absolute photoabsorption cross sections of norbornadiene (NBD) and quadricyclane (QC), two isomers with chemical formula C7H8 that are attracting much interest for solar energy storage applications, have been measured from threshold up to 10.8 eV using the Fourier transform spectrometer at the SOLEIL synchrotron radiation facility. The absorption spectrum of NBD exhibits some sharp structure associated with transitions into Rydberg states, superimposed on several broad bands attributable to valence excitations. Sharp structure, although less pronounced, also appears in the absorption spectrum of QC. Assignments have been proposed for some of the absorption bands using calculated vertical transition energies and oscillator strengths for the electronically excited states of NBD and QC. Natural transition orbitals indicate that some of the electronically excited states in NBD have a mixed Rydberg/valence character, whereas the first ten excited singlet states in QC are all predominantly Rydberg in the vertical region. In NBD, a comparison between the vibrational structure observed in the experimental 11B1-11A1 (3sa1 ← 5b1) band and that predicted by Franck-Condon and Herzberg-Teller modeling has necessitated a revision of the band origin and of the vibrational assignments proposed previously. Similar comparisons have encouraged a revision of the adiabatic first ionization energy of NBD. Simulations of the vibrational structure due to excitation from the 5b2 orbital in QC into 3p and 3d Rydberg states have allowed tentative assignments to be proposed for the complex structure observed in the absorption bands between ∼5.4 and 7.0 eV.
Language	English
Publishing date	2024-02-13
Publishing country	United States
Document type	Journal Article
ZDB-ID	3113-6
ISSN	1089-7690 ; 0021-9606
ISSN (online)	1089-7690
ISSN	0021-9606
DOI	10.1063/5.0187707
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Bonn / Germany

Z 4' 49/16: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

To top

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED