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

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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 languageEnglish
Number of pages6
JournalPhysical Review Letters
DOIs
Publication statusPublished - 15 Oct 2019

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orbits
pulses
atoms
electrons
photons
krypton
polarized light
time dependence
time lag
decay
excitation

Keywords

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

Cite this

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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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TY - JOUR

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 -