Eur. Phys. J. A (2012) 48: 89
https://doi.org/10.1140/epja/i2012-12089-2

Regular Article - Experimental Physics

Measurement of the L/K electron capture ratio of the ²⁰⁷Bi decay to the 1633 keV level of ²⁰⁷Pb with a BGO scintillating bolometer

¹ Institut d’Astrophysique Spatiale, Université Paris-Sud 11 and CNRS (UMR 8617), Bâtiment 121, 91405, Orsay Cedex, France
² Grupo de Física Nuclear y Astropartículas, Universidad de Zaragoza, C/ Pedro Cerbuna 12, 50009, Zaragoza, Spain
³ École nationale supérieure de physique de Strasbourg (ENSPS), Université Louis Pasteur, Bd Sébastien Brant, BP 10413, 67412, Illkirch Cedex, France

^* e-mail: puimedon@unizar.es

Received: 10 October 2011
Revised: 18 March 2012
Accepted: 24 May 2012
Published online: 22 June 2012

Abstract

The ROSEBUD Collaboration has dedicated several underground runs to study different types of bolometers, mainly for the search of dark matter. Some of these runs, profiting from the good energy resolution of one bolometer of BGO and the ultra-low background of the underground laboratory of Canfranc (LSC), allowed the measurement of the L/K electron capture ratio of the ²⁰⁷Bi decay to the 1633 keV level of ²⁰⁷Pb. This paper constitutes the first published measurement of this magnitude.