First application of superconducting transition-edge sensor microcalorimeters to hadronic atom X-ray spectroscopy

Summary, in English

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 φM1 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.

• Author: S. Okada; D. A. Bennett; C. Curceanu; W. B. Doriese; J. W. Fowler; J. D. Gard; F. P. Gustafsson; T. Hashimoto; R. S. Hayano; S. Hirenzaki; J. P. Hays-Wehle; G. C. Hilton; N. Ikeno; M. Iliescu; S. Ishimoto; K. Itahashi; M. Iwasaki; T. Koike; K. Kuwabara; Y. Ma; J. Marton; H. Noda; G. C. O'Neil; H. Outa; C. D. Reintsema; M. Sato; D. R. Schmidt; H. Shi; K. Suzuki; T. Suzuki; D. S. Swetz; H. Tatsuno; J. Uhlig; J. N. Ullom; E. Widmann; S. Yamada; J. Yamagata-Sekihara; J. Zmeskal
• Department/s: Chemical Physics
• Publishing year: 2016-09-01
• Language: English
• Publication/Series: Progress of Theoretical and Experimental Physics
• Volume: 2016
• Issue: 9
• Links: http://dx.doi.org/10.1093/ptep/ptw130
• Document type: Journal article
• Publisher: Oxford University Press
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 2050-3911