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A multiparametric HPGe-Nal acquisition system for low gamma activity measurements of meteorites

Taricco, Carla and Bhandari, Narendra and Colombetti, Paolo and Mariani, I. and Verma, Neeharika and Vivaldo, Gianna A multiparametric HPGe-Nal acquisition system for low gamma activity measurements of meteorites. Memorie della Società Astronomica Italiana, Suppl. (14). pp. 177-179. ISSN 1824-016X (2010)

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Abstract

The study of long-term solar activity variations in the past requires the use of radioisotopic data planetary reservoirs. At the Laboratory of Monte dei Cappuccini in Torino (IFSI-Torino, INAF) for many years we have been studying radioisotopes in meteorites, because their production, which is related to galactic cosmic ray flux in the heliosphere, is anticorrelated with the heliospheric magnetic field variations. We have developed very sensitive gamma detection techniques, in particular to measure 44Ti activity in meteorites; due to its half-life (t1=2 = 59:2 years), this radioisotope is an ideal index to reveal the imprint of solar activity variations on the centennial scale. Recently we have improved the spectrometer by a new multiparametric acquisition system, which allows to extract efficiently the 44Ti peak from the natural background.

Item Type: Article
Uncontrolled Keywords: Sun: activity – Meteoroids – Cosmic rays – Sun: magnetic fields – Techniques: gamma spectroscopy – Sunspots – Interplanetary medium – Solar-terrestrial relations
Subjects: Q Science > QB Astronomy
Q Science > QC Physics
Research Area: Economics and Institutional Change
Depositing User: Gianna Vivaldo
Date Deposited: 10 Nov 2014 13:01
Last Modified: 25 Mar 2015 09:16
URI: http://eprints.imtlucca.it/id/eprint/2358

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