Direct measurement of the Be L/K capture ratio in Ta-based superconducting tunnel junctions

S. Fretwell, K.G. Leach, ∗ C. Bray, G.B. Kim, J. Dilling, A. Lennarz, X. Mougeot, F. Ponce, 2 C. Ruiz, J. Stackhouse, and S. Friedrich Department of Physics, Colorado School of Mines, Golden, CO 80401, USA Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USA TRIUMF, 4004 Wesbrook Mall, Vancouver, BC V6T 2A3, Canada CEA, LIST, Laboratoire National Henri Becquerel, CEA-Saclay 91191 Gif-sur-Yvette Cedex, France Department of Physics, Stanford University, Stanford, CA 94305, USA (Dated: April 27, 2021)