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Jens Uhlig. Portrait.

Jens Uhlig

Senior lecturer

Jens Uhlig. Portrait.

Measurements of Strong-Interaction Effects in Kaonic-Helium Isotopes at Sub-eV Precision with X-Ray Microcalorimeters

Author

  • T. Hashimoto
  • S. Okada
  • H. Tatsuno
  • J. Uhlig
  • J. Zmeskal

Summary, in English

We have measured the 3d→2p transition x rays of kaonic 3He and 4He
atoms using superconducting transition-edge-sensor microcalorimeters
with an energy resolution better than 6 eV (FWHM). We determined the
energies to be 6224.5±0.4(stat)±0.2(syst) eV and 6463.7±0.3(stat)±0.1(syst) eV, and widths to be 2.5±1.0(stat)±0.4(syst) eV and 1.0±0.6(stat)±0.3(stat) eV, for kaonic 3He and 4He,
respectively. These values are nearly 10 times more precise than in
previous measurements. Our results exclude the large strong-interaction
shifts and widths that are suggested by a coupled-channel approach and
agree with calculations based on optical-potential models.

Department/s

  • Chemical Physics
  • NanoLund: Centre for Nanoscience

Publishing year

2022

Language

English

Publication/Series

Physical Review Letters

Volume

128

Issue

11

Document type

Journal article

Publisher

American Physical Society

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 1079-7114