Absolute X-ray energy measurement using a high-accuracy angle encoder

Abstract

This paper presents an absolute X-ray photon energy measurement method that uses a Bond diffractometer. The proposed system enables the prompt and rapid in-situ measurement of photon energies in a wide energy range. The diffractometer uses a reference silicon single crystal plate and a highly accurate angle encoder called SelfA. We evaluate the performance of the system by repeatedly measuring the energy of the first excited state of the potassium-40 nuclide. The excitation energy is determined as 29829.39(6) eV. It is one order of magnitude more precise than the previous measurement. The estimated uncertainty of the photon energy measurement was 0.7 ppm as a standard deviation and the maximum observed deviation was 2 ppm.

References in corpus (7)

• Energy of the ${}^{229}$Th nuclear clock transition
• Laser spectroscopic characterization of the nuclear clock isomer ${}^{229m}$Th
• X-ray pumping of the Th-229 nuclear clock isomer
• Energy of the ${}^{229}$Th Nuclear Clock Isomer Determined by Absolute $\gamma$-ray Energy Difference
• Fast X-ray detector system with simultaneous measurement of timing and energy for a single photon
• Nuclear resonant scattering experiment with fast time response: new scheme for observation of ${}^{229\mathrm{m}}$Th radiative decay
• Energy response of X-rays under high flux conditions using a thin APD for the energy range of 6-33 keV

Cited by in corpus (2)

• Controlling ${}^{229}$Th isomeric state population in a VUV transparent crystal
• Nuclear clocks for testing fundamental physics