Skip to main content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

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

Published

Author(s)

Douglas A. Bennett, William B. Doriese, Joseph W. Fowler, Johnathon D. Gard, James P. Hays-Wehle, Gene C. Hilton, Carl D. Reintsema, Daniel S. Swetz, Joel N. Ullom

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. The pionic-carbon 4 → 3 transition x-ray emission line and its fine structure splitting 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 a key milestone towards next-generation high-resolution kaonic-atom x-ray spectroscopy.
Citation
Progress of Theoretical Physics
Volume
2016
Issue
9,1

Keywords

x-ray spectroscopy, TES microcalorimeters, x-ray fundamental parameters
Created September 30, 2016, Updated November 10, 2018