Journal
ASTROPARTICLE PHYSICS
Volume 18, Issue 1, Pages 1-25Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0927-6505(01)00179-7
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Funding
- Division Of Physics
- Direct For Mathematical & Physical Scien [0802646] Funding Source: National Science Foundation
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The techniques researched, developed and applied towards the measurement of radioisotope concentrations at ultra-low levels in the real-time solar neutrino experiment BOREXINO at Gran Sasso are presented and illustrated with specific results of widespread interest. We report the use of low-level germanium gamma spectrometry, low-level miniaturized gas proportional counters and low background scintillation detectors developed in solar neutrino research. Each now sets records in its field. We additionally describe our techniques of radiochemical ultra-pure, few atom manipulations and extractions. Forefront measurements also result from the powerful combination of neutron activation and low-level counting. Finally, with our techniques and commercially available mass spectrometry and atomic absorption spectroscopy, new low-level detection limits for isotopes of interest are obtained. (C) 2002 Elsevier Science B.V. All rights reserved.
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