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arXiv · 2307.09870

Measurement of the 171Tm beta spectrum

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

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Frédéric Juget, Maarten van Dijk, Emilio Andrea Maugeri, Maria Dorothea Schumann, Stephan Heinitz, Alexey Boyarsky, Ulli Köster, Lesya Shchutska, Claude Bailat. 2023-07-19. Measurement of the 171Tm beta spectrum. https://doi.org/10.1016/j.apradiso.2023.111058

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