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  1. Pubblicazioni

Low gamma acrivity measurement of meteorites using HPGe-NaI detector system

Articolo
Data di Pubblicazione:
2013
Abstract:
The radioactivity in natural samples like cosmogenic isotopes in meteorites, in Moon samples, in earth and ice in Antarctica, produced by protons, neutrons, μ mesons and other charged particles, is very low, usually below 0.001 disintegration per minute per gram. Therefore, very special techniques are required, particularly if the sample cannot be destroyed for chemical separation and system must have possibility of counting large amount of sample. For this purpose we have developed a highly selective Ge–NaI coincidence spectrometer, operating in the underground Laboratory of Monte dei Cappuccini (INAF) in Torino. We have then improved it by developing a multiparametric acquisition system, which allows better selectivity of the coincidence windows (e.g., in meteorites, to disentangle cosmogenic 44Ti signal from overlapping 214Bi, originated by naturally occurring 238U). Applications of this system to the study of meteorites (chondrite, achondrite and iron samples) are described.
Tipologia CRIS:
03A-Articolo su Rivista
Keywords:
gamma-ray spectroscopy; cosmogenic radionuclides; past solar activity
Elenco autori:
Colombetti P.; Taricco C.; Bhandari N.; Sinha N.; Di Martino M.; Cora A.; Vivaldo G.
Autori di Ateneo:
COLOMBETTI Paolo
TARICCO Carla Dina Marcella
Link alla scheda completa:
https://iris.unito.it/handle/2318/137581
Link al Full Text:
https://iris.unito.it/retrieve/handle/2318/137581/18957/NIM2013-nonformat.pdf
Pubblicato in:
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT
Journal
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URL

http://www.sciencedirect.com/science/article/pii/S0168900212008455
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