Dresden 2013 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 102: Niederenergie-Neutrinophysik 4
T 102.4: Vortrag
Mittwoch, 6. März 2013, 17:35–17:50, WIL-A317
Calorimetric measurements of the 163Ho spectrum — •Philipp Chung-On Ranitzsch1, Mathias Wegner1, Sebastian Kempf1, Christian Pies1, Sönke Schäfer1, Daniel Hengstler1, Andreas Fleischmann1, Christian Enss1, Karl Johnston2,3, Alexander Herlert2,4, and Loredana Gastaldo1 — 1Kirchhoff-Institute for Physics, Heidelberg University, INF 227, 69120 Heidelberg — 2CERN, Physics Department, 1211 Geneva 23, Switzerland — 3Technische Physik, Universität des Saarlandes, 66041 Saarbrücken — 4Present address: FAIR GmbH, Planckstr. 1, 64291 Darmstadt
The ECHo Experiment aims to investigate the value of the electron neutrino mass in the sub-eV range by means of high precision high statistics calorimetric measurement of the electron capture spectrum of 163Ho.
The calorimetric measurement will be performed using arrays of low temperature metallic magnetic calorimeters (MMCs) where the 163Ho source is fully embedded in the absorbers, to ensure a complete absorption of the emitted radiation. These detectors combine a very high energy resolution, presently 2 eV (FWHM) for soft x-rays, with a fast signal rise-time of 90 ns.
We present our recent calorimetric measurements of the 163Ho electron capture spectrum. The data were acquired using two metallic magnetic calorimeters having the 163Ho ions implanted in the absorbers. We will discuss the performance of the detectors and present a preliminary analysis of the spectrum.