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Published on: January 30, 2020
Study of XK and gamma photon emission following decay of 154Eu
E Terechtchenko1, M Rasko, S Sepman
1D.I. Mendeleyev Institute for Metrology (VNIIM), 19 Moskovsky Prospect, St. Petersburg 198005, Russia. tee@vniim.ru
Abstract:
A joint project has been established between VNIIM (D.I. Mendeleyev Institute for Metrology) and LNHB (Laboratoire National Henri Becquerel) to determine as accurately as possible the X- and gamma-ray emission probabilities of 154Eu. Point sources were prepared by VNIIM, and absolute measurements of activity per unit mass were undertaken by both laboratories using coincidence, anti-coincidence and 4pi-gamma counting methods. Other point sources and one aliquot were also prepared for precise gamma-ray spectrometry measurements. Absolute photon emission probabilities were determined with a maximum uncertainty of 0.5% for the most intense lines, supporting the development of this nuclide as a multigamma standard.
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