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Results of the pilot experiment to search for inelastic interactions of WIMPs with 73Ge |
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| Authors: | F. T. Avignone III R. L. Brodzinski A. A. Klimenko H. S. Miley S. B. Osetrov J. H. Reeves A. A. Smolnikov S. I. Vasiliev |
| Affiliation: | (1) University of South Carolina, Columbia, South Carolina, USA;(2) Pacific Northwest National Laboratory, Richland, USA;(3) Institute for Nuclear Research, Russian Academy of Sciences, pr. Shestidesyatiletiya Oktyabrya 7a, Moscow, 117312, Russia;(4) Joint Institute for Nuclear Research, Dubna, Moscow oblast, 141980, Russia |
| Abstract: | A pilot search for the excitation of 73Ge to the first excited state at 13.26 keV by spin-dependent interactions of Weakly Interacting Massive Particles (WIMPs) was performed. The first experimental results have been analyzed with a new method. The background for these reactions is ≤0.0012 events/(keV kg(73Ge) d). Although there is no theory for E2 excitations by WIMPs, this very large suppression of the background may promise an enlarged version of this experiment to be competitive. It is appropriate to propose an experiment with several kg of enriched 73Ge detectors based on these results. |
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