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- Title
First application of superconducting transition-edge sensor microcalorimeters to hadronic atom X-ray spectroscopy.
- Authors
Okada, S.; Bennett, D. A.; Curceanu, C.; Doriese, W. B.; Fowler, J. W.; Gard, J. D.; Gustafsson, F. P.; Hashimoto, T.; Hayano, R. S.; Hirenzaki, S.; Hays-Wehle, J. P.; Hilton, G. C.; Ikeno, N.; Iliescu, M.; Ishimoto, S.; Itahashi, K.; Iwasaki, M.; Koike, T.; Kuwabara, K.; Ma, Y.
- Abstract
High-resolution pionic atom X-ray spectroscopy was performed with an X-ray spectrometer based on a 240 pixel array of superconducting transition-edge sensor (TES) microcalorimeters at the πM1 beam line of the Paul Scherrer Institute. X-rays emitted by pionic carbon via the 4f → 3d transition and the parallel 4d → 3p transition were observed with a full width at half maximum energy resolution of 6.8 eV at 6.4 keV. The measured X-ray energies are consistent with calculated electromagnetic values which considered the strong interaction effect assessed via the Seki-Masutani potential for the 3p energy level, and favor the electronic population of two filled 1s electrons in the K-shell. Absolute energy calibration with an uncertainty of 0.1 eV was demonstrated under a high-rate hadron beam condition of 1.45 MHz. This is the first application of a TES spectrometer to hadronic atom X-ray spectroscopy and is an important milestone towards next-generation high-resolution kaonic atom X-ray spectroscopy.
- Publication
Progress of Theoretical & Experimental Physics: PTEP, 2016, Vol 2016, Issue 9, p1
- ISSN
2050-3911
- Publication type
Article
- DOI
10.1093/ptep/ptw130