4–12 Oct 2023
Obertrubach-Bärnfels
Europe/Berlin timezone

83mKr N-line spectrum measurement at KATRIN

7 Oct 2023, 09:00
15m
Obertrubach-Bärnfels

Obertrubach-Bärnfels

Gasthof*** Drei Linden Bärnfels-Dorfstr. 38 91286 Obertrubach
Participant talk Main session Participant Presentations

Speaker

Jaroslav Storek (Karlsruher Institut für Technologie)

Description

In the KArlsruhe TRItium Neutrino (KATRIN) experiment we perform a precision measurement of the tritium beta decay spectrum. Our goal is to determine the neutrino mass by investigating the spectrum shape near the endpoint region at around 18.6 keV. Recently we have published a new direct upper limit on neutrino mass of 0.8 eV/c2 (90% C.L.) which has been obtained with only 5% of the anticipated total measurement time. However, reaching the target sensitivity of 0.2 eV/c2 at 90% C.L. not only requires the full measurement time, but also the detailed study of systematic measurement uncertainties. Several of them can be studied by measuring a shape distortion of the 83mKr electron conversion lines which are commonly used for calibration purposes of different (astro-)particle physics experiments. This creates high demands on precise knowledge of the undistorted krypton spectrum.

In KATRIN we use the 32 keV N-lines lying in the high energy region of the 83mKr spectrum including the weaker N1 line. In this talk I will present current results of a dedicated 83mKr electron N-spectrum measurement with emphasis on N1 line conducted at KATRIN.

Primary author

Jaroslav Storek (Karlsruher Institut für Technologie)

Presentation materials