Microcalorimeter design for fast-neutron spectroscopy

摘要

We are developing microcalorimeters for fast-neutron spectroscopy. The goal is to develop a detector with an energ resolution of 0.1% for 1-20 MeV neutrons with an efficiency of 1%. We discuss the design of such a detector an present the first results of a transition edge sensor based microcalorimeter with a small TiB_2 absorber. The best energ resolution obtained was 5.5 keV FWHM for a total energy deposition of 2.792 MeV by thermal neutrons.