Resolving Ultra-Fast Spin-Orbit Dynamics in Heavy Many-Electron Atoms

Jack Wragg; Daniel D. A. Clarke; Gregory S. J. Armstrong; Andrew C. Brown; Connor P. Ballance; Hugo W. Van Der Hart

doi:10.1103/PhysRevLett.123.163001

Resolving Ultra-Fast Spin-Orbit Dynamics in Heavy Many-Electron Atoms

Jack Wragg, Daniel D. A. Clarke, Gregory S. J. Armstrong, Andrew C. Brown, Connor P. Ballance, Hugo W. Van Der Hart

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Abstract

We use R-Matrix with Time-dependence (RMT) theory, with spin-orbit effects included, to study krypton irradiated by two time-delayed XUV ultrashort pulses. The first pulse excites the atom to 4s$^2$4p$^5$5s. The second pulse then excites 4s4p65s autoionising levels, whose population can be observed through their subsequent decay. By varying the time delay between the two pulses, we are able to control the excitation pathway to the autoionising states. The use of cross-polarised light pulses allows us to isolate the two-photon pathway, with one photon taken from each pulse.

Original language	English
Number of pages	6
Journal	Physical Review Letters
DOIs	https://doi.org/10.1103/PhysRevLett.123.163001
Publication status	Published - 15 Oct 2019

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Keywords

First-principles calculations
atoms
Spin-orbit coupling
Single- and few-photon ionization & excitation

Cite this

Wragg, J., Clarke, D. D. A., Armstrong, G. S. J., Brown, A. C., Ballance, C. P., & Van Der Hart, H. W. (2019). Resolving Ultra-Fast Spin-Orbit Dynamics in Heavy Many-Electron Atoms. Physical Review Letters. https://doi.org/10.1103/PhysRevLett.123.163001

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title = "Resolving Ultra-Fast Spin-Orbit Dynamics in Heavy Many-Electron Atoms",

abstract = "We use R-Matrix with Time-dependence (RMT) theory, with spin-orbit effects included, to study krypton irradiated by two time-delayed XUV ultrashort pulses. The first pulse excites the atom to 4s$^2$4p$^5$5s. The second pulse then excites 4s4p65s autoionising levels, whose population can be observed through their subsequent decay. By varying the time delay between the two pulses, we are able to control the excitation pathway to the autoionising states. The use of cross-polarised light pulses allows us to isolate the two-photon pathway, with one photon taken from each pulse.",

keywords = "First-principles calculations, atoms, Spin-orbit coupling, Single- and few-photon ionization & excitation",

author = "Jack Wragg and Clarke, {Daniel D. A.} and Armstrong, {Gregory S. J.} and Brown, {Andrew C.} and Ballance, {Connor P.} and {Van Der Hart}, {Hugo W.}",

year = "2019",

month = "10",

day = "15",

doi = "10.1103/PhysRevLett.123.163001",

language = "English",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

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T1 - Resolving Ultra-Fast Spin-Orbit Dynamics in Heavy Many-Electron Atoms

AU - Wragg, Jack

AU - Clarke, Daniel D. A.

AU - Armstrong, Gregory S. J.

AU - Brown, Andrew C.

AU - Ballance, Connor P.

AU - Van Der Hart, Hugo W.

PY - 2019/10/15

Y1 - 2019/10/15

N2 - We use R-Matrix with Time-dependence (RMT) theory, with spin-orbit effects included, to study krypton irradiated by two time-delayed XUV ultrashort pulses. The first pulse excites the atom to 4s$^2$4p$^5$5s. The second pulse then excites 4s4p65s autoionising levels, whose population can be observed through their subsequent decay. By varying the time delay between the two pulses, we are able to control the excitation pathway to the autoionising states. The use of cross-polarised light pulses allows us to isolate the two-photon pathway, with one photon taken from each pulse.

AB - We use R-Matrix with Time-dependence (RMT) theory, with spin-orbit effects included, to study krypton irradiated by two time-delayed XUV ultrashort pulses. The first pulse excites the atom to 4s$^2$4p$^5$5s. The second pulse then excites 4s4p65s autoionising levels, whose population can be observed through their subsequent decay. By varying the time delay between the two pulses, we are able to control the excitation pathway to the autoionising states. The use of cross-polarised light pulses allows us to isolate the two-photon pathway, with one photon taken from each pulse.

KW - First-principles calculations

KW - atoms

KW - Spin-orbit coupling

KW - Single- and few-photon ionization & excitation

U2 - 10.1103/PhysRevLett.123.163001

DO - 10.1103/PhysRevLett.123.163001

M3 - Article

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

ER -

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Resolving Ultra-Fast Spin-Orbit Dynamics in Heavy Many-Electron Atoms
© 2019 American Physical Society. This work is made available online in accordance with the publisher’s policies. Please refer to any applicable terms of use of the publisher.
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Resolving Ultra-Fast Spin-Orbit Dynamics in Heavy Many-Electron Atoms

Abstract

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Related content

Projects

ARMouReD: Atomic R-matrix Method for Relativistic Dynamics

UK Atomic, Molecular and Optical physics R-matrix consortium (UK AMOR)

Datasets

Data for Resolving Ultra-Fast Spin-Orbit Dynamics in Heavy Many-Electron Atoms

Research Output

The R-matrix with time dependence (RMT) code