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

Research outputpeer-review


The beta spectrum of the main transition of the β- 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 ξ-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.

Original languageEnglish
Article number111058
Number of pages6
JournalApplied Radiation and Isotopes
StatePublished - Dec 2023

ASJC Scopus subject areas

  • Radiation

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