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.

Details

Title
First application of superconducting transition-edge sensor microcalorimeters to hadronic atom X-ray spectroscopy
Author
Okada, S 1 ; Bennett, D A 2 ; Curceanu, C 3 ; Doriese, W B 2 ; Fowler, J W 2 ; Gard, J D 2 ; Gustafsson, F P 4 ; Hashimoto, T 1 ; Hayano, R S 5 ; Hirenzaki, S 6 ; Hays-Wehle, J P 2 ; Hilton, G C 2 ; Ikeno, N 7 ; Iliescu, M 3 ; Ishimoto, S 8 ; Itahashi, K 1 ; Iwasaki, M 1 ; Koike, T 9 ; Kuwabara, K 10 ; Y Ma 1 ; Marton, J 11 ; Noda, H 1 ; O'Neil, G C 2 ; Outa, H 1 ; Reintsema, C D 2 ; Sato, M 1 ; Schmidt, D R 2 ; Shi, H 3 ; Suzuki, K 11 ; Suzuki, T 5 ; Swetz, D S 2 ; Tatsuno, H 12 ; Uhlig, J 4 ; Ullom, J N 2 ; Widmann, E 11 ; Yamada, S 10 ; Yamagata-Sekihara, J 13 ; Zmeskal, J 11 

1  RIKEN Nishina Center, RIKEN, Wako 351-0198, Japan 
2  National Institute of Standards and Technology, Boulder, CO 80305, USA 
3  Laboratori Nazionali di Frascati dell' INFN, I-00044 Frascati, Italy 
4  Lund University, Box 117, 221 00 Lund, Sweden 
5  Department of Physics, The University of Tokyo, Tokyo 113-0033, Japan 
6  Department of Physics, Nara Women's University, Kita-Uoya Nishimachi, Nara 630-8506, Japan 
7  Department of Regional Environment, Tottori University, Tottori 680-8551, Japan 
8  High Energy Accelerator Research Organization, KEK, Tsukuba 305-0801, Japan 
9  Research Center for Physics and Mathematics, Osaka Electro-Communication University, Neyagawa, Osaka 572-8530, Japan 
10  Tokyo Metropolitan University, Hachioji 192-0397, Japan 
11  Stefan-Meyer-Institut für Subatomare Physik, A-1090 Vienna, Austria 
12  High Energy Accelerator Research Organization, KEK, Tsukuba 305-0801, Japan; National Institute of Standards and Technology, Boulder, CO 80305, USA 
13  National Institute of Technology, Oshima College, Oshima, Yamaguchi 742-2193, Japan 
Publication year
2016
Publication date
Sep 2016
Publisher
Oxford University Press
e-ISSN
20503911
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1093/ptep/ptw130
ProQuest document ID
3171476462
Copyright
© The Author(s) 2016. Published by Oxford University Press on behalf of the Physical Society of Japan. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.