First application of superconducting transition-edge-sensor microcalorimeters to hadronic-atom x-ray spectroscopy
| Autor: | Okada, S., Bennett, D. A., Curceanu, C., Doriese, W. B., Fowler, J. W., Gard, J., 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., Marton, J., Noda, H., O'Neil, G. C., Outa, H., Reintsema, C. D., Sato, M., Schmidt, D. R., Shi, H., Suzuki, K., Suzuki, T., Swetz, D. S., Tatsuno, H., Uhlig, J., Ullom, J. N., Widmann, E., Yamada, S., Yamagata-Sekihara, J., Zmeskal, J. |
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| Rok vydání: | 2016 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | 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 piM1 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. 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. Comment: 11 pages, 3 figures, submitted to PTEP |
| Databáze: | arXiv |
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