Evaluation of (alpha,n) Induced Neutrons as a Background for Dark Matter Experiments

Details Evaluation of (alpha,n) Induced Neutrons as a Background for Dark Matter Experiments Evaluation of (alpha,n) Induced Neutrons as a Background for Dark Matter Experiments

2008-12-22

arxiv.org/abs/0812.4307v2

Nucl.Instrum.Meth.A606:651-660,2009

Physics

Nuclear Physics

Nuclear Experiment

23 pages, 13 figures and 13 tables

Scientific paper

10.1016/j.nima.2009.04.032

Neutrons from ($\alpha$,n) reactions through thorium and uranium decays are important sources of background for direct dark matter detection. The neutron yields and energy spectra from a range of materials that are used to build dark matter detectors are calculated and tabulated. In addition to thorium and uranium decays, we found that $\alpha$ particles from samarium, often the dopant of the window materials of photomultiplier tubes (PMT), are also an important source of neutron yield. The results in this paper can be used as the input to Monte Carlo simulations for many materials that will be used for next generation experiments.

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