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Sökning: WFRF:(Mullins N) > Kungliga Tekniska Högskolan

  • Resultat 1-4 av 4
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1.
  • Rohringer, N., et al. (författare)
  • Stimulated X-Ray Raman Scattering with Free-Electron Laser Sources
  • 2016
  • Ingår i: X-Ray Lasers 2014. - Cham : Springer. - 0930-8989. - 9783319195216 - 9783319195209 ; , s. 201-207
  • Bokkapitel (refereegranskat)abstract
    • Stimulated electronic x-ray Raman scattering is the building block for several proposed x-ray pump probe techniques, that would allow the study of electron dynamics at unprecedented timescales.We present high spectral resolution data on stimulated electronic x-ray Raman scattering in a gas sample of neon using a self-amplified spontaneous emission x-ray free-electron laser. Despite the limited spectral coherence and broad bandwidth of these sources, high-resolution spectra can be obtained by statistical methods, opening the path to coherent stimulated x-ray Raman spectroscopy. An extension of these ideas to molecules and the results of a recent experiment in CO are discussed.
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3.
  • Mabala, G. K., et al. (författare)
  • Shears band with a large dynamic moment of inertia in Bi-197
  • 2005
  • Ingår i: European Physical Journal A. - : Springer Science and Business Media LLC. - 1434-6001 .- 1434-601X. ; 25:1, s. 49-55
  • Tidskriftsartikel (refereegranskat)abstract
    • High-spin states in Bi-197 were studied with the AFRODITE gamma-ray array at iThemba LABS using the Ta-181(Ne-22, 6n) reaction at a beam energy of 125 MeV. A new shears band was found and linked to the low-lying states in Bi-197. Its dynamic moment of inertia, F (2), is considerably larger than the ((2)) of the shears bands in the neighbouring Pb isotopes. This is probably a result of the involvement of an additional high-K h(9/2) proton orbital.
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4.
  • Manschwetus, B., et al. (författare)
  • Ultrafast ionization and fragmentation dynamics of polycyclic atomatic hydro-carbons by XUV radiation
  • 2020
  • Ingår i: Free Electron Laser. - : IOP Publishing. - 1742-6588. ; 1412
  • Konferensbidrag (refereegranskat)abstract
    • In the interstellar medium polycyclic aromatic hydrocarbon molecules (PAH) are exposed to strong ionizing radation leading to complex organic photochemistry. We investigated these ultrafast fragmentation reac-tions after ionization of the PAHs phenanthrene, fluorene and pyrene at a wavelength of 30.3 nm using pump probe spectroscopy at a free electron laser. We observe double ionization and afterwards hydrogen abstraction and acetylene loss with characteristic time scales for the reaction processes below one hundred femtoseconds.
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  • Resultat 1-4 av 4

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