Enhancing the energy resolution of resonant coherent excitation using the cooled U89+ beam extracted from the ESR

29th International Conference on Photonic, Electronic, and Atomic Collisions

Nakano, Y.^1 ; Ananyeva, A.^2,3 ; Menk, S.^1 ; Bräuning-Demian, A.^2 ; Bräuning, H.^2 ; Kleffner, C.^2 ; Stöhlker, Th.^2,4,5 ; Azuma, T.^1,6

Atomic, Molecular and Optical Physics Laboratory, RIKEN, Saitama

351-0198, Japan^1

GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt

D-64291, Germany^2

Johann Wolfgang Goethe Universität, Frankfurt am Main

60438, Germany^3

Helmholtz-Institut Jena, Jena

D-07743, Germany^4

Friedrich-Schiller University Jena, Jena

07737, Germany^5

Department of Physics, Tokyo Metropolitan University, Tokyo

192-0397, Japan^6

关键词: Collisional;    Electron cooling;    Energy resolutions;    Kinetic temperatures;    Momentum spreads;    Resonance width;    Resonant coherent excitation;    Thin crystal;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/635/3/032016/pdf
DOI  :  10.1088/1742-6596/635/3/032016

来源: IOP

【 摘 要 】

We report on the resonant coherent excitation (RCE) of the 2s-2p3/2transition in Li-like U89+with an enhanced energy resolution, which was achieved by reducing the projectiles momentum spread. The kinetic temperature of the beam was decreased by electron cooling in the ESR, and the collisional momentum broadening in the target was suppressed by the use of thin crystal (1.0 and 2.5 μm-thick). The resonance width was observed to be ∼1.4 eV in FWHM, which is three-times narrower than that from the previous work.