Experimental Search for Solar Axions via Coherent Primakoff Conversion in a Germanium Spectrometer
F. T. Avignone, D. Abriola, R. L. Brodzinski, J. I. Collar, R. J. Creswick, D. E. DiGregorio, H. A. Farach, A. O. Gattone, C. K. Guerard, F. Hasenbalg, H. Huck, H. S. Miley, A. Morales, J. Morales, S. Nussinov, A. Ortiz de Solorzano, J. H. Reeves, J. A. Villar, K. Zioutas
Abstract
Results are reported of an experimental search for the unique, rapidly varying temporal pattern of solar axions coherently converting into photons via the Primakoff effect in a single crystal germanium detector. This conversion is predicted when axions are incident at a Bragg angle with a crystalline plane. The analysis of approximately 1.94 kg.yr of data from the 1 kg DEMOS detector in Sierra Grande, Argentina, yields a new laboratory bound on axion-photon coupling of gaγγ < 2.7· 10-9 GeV-1, independent of axion mass up to ~ 1 keV.
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