Measurement of the 171Tm beta spectrum

Author:

Frédéric Juget, Maarten van Dijk, Emilio Andrea Maugeri, Maria Dorothea Schumann, Stephan Heinitz, Alexey Boyarsky, Ulli Köster, Lesya Shchutska, Claude Bailat

Keyword:

Nuclear Experiment, Nuclear Experiment (nucl-ex), Instrumentation and Detectors (physics.ins-det)

journal:

Applied Radiation and Isotopes 202 (2023) 111058

date:

2023-07-18 16:00:00

Abstract

The beta spectrum of the main transition of the beta-decay of 171Tm was measured using a double focalizing spectrometer. The instrument was lately improved in order to reduce its low energy threshold to 34 keV. We used the spectrometer to measure the beta spectrum end-point energy of the main transition of 171Tm decay using the Kurie plot formalism. We report a new value of 97.60(38) keV, which is in agreement with previous measurements. In addition, the spectrum shape was compared with the xi-approximation calculation where the shape factor is equal to 1 and good agreement was found between the theory and the measurement at the 1% level.

PDF: Measurement of the 171Tm beta spectrum.pdf