Eur. Phys. J. Plus (2017) 132: 269
https://doi.org/10.1140/epjp/i2017-11556-y

Regular Article

Improvement of the extraction method of faint signals in -activity measurements of meteorites^⋆

¹ INAF, Osservatorio Astrofisico di Torino (OATo), Via Osservatorio 20, 10025, Pino Torinese, Italy
² Università degli Studi di Torino, Dipartimento di Fisica, Via Pietro Giuria, 1, 10125, Torino, Italy

^* e-mail: gardiol@oato.inaf.it

Received: 15 May 2017
Accepted: 16 May 2017
Published online: 20 June 2017

Abstract

At the underground laboratory of Monte dei Cappuccini (OATo-INAF) in Torino (Italy) we set up selective HPGe-NaI(Tl) spectrometers for measurements of cosmogenic radioisotopes in meteorites in order to study centennial-scale modulation of solar activity. ⁴⁴ Ti is a suitable proxy for this timescale, but its detection is difficult due to the strong interference by naturally occurring ²¹⁴ Bi. In order to optimize the extraction of the ⁴⁴ Ti signal, we have developed software procedures specifically designed to improve selectivity of the Ge-NaI detectors coincidence.