Physics
Scientific paper
Apr 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008dmap.conf..468k&link_type=abstract
DARK MATTER IN ASTROPARTICLE AND PARTICLE PHYSICS. Proceedings of the 6th International Heidelberg Conference. Held 24-28 Septem
Physics
Scientific paper
Independent analysis of the spectra from the Heidelberg-Moscow experiment has been carried out. A direct comparison of the peak intensities in the spectra allows the conclusion that in the energy range up to 3200 keV the background is due to detection of γ-rays from the decay of trace impurities of anthropogenic and cosmogenic nuclides occurring in the apparatus between the HPGe detectors and the main (Pb and Cu) shielding. The 226Ra, 214Pb, and 214Bi γ-rays observed in the spectra are shown to arise in the 226Ra rather than 238U decay chain. The estimates of the expected intensities of weak 214Bi γ-rays in the spectrum region in the vicinity of Qββ(76Ge) = 2039 keV do not contradict observation of the peak at 2039 keV as claimed by Klapdor-Kleingrothaus and coauthors.
Bednyakov Vadim A.
Chumin V. G.
Fominykh V. I.
Gromov Ya. K.
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