TY  - JOUR
Y1  - 2013/08//
SN  - 0168-9002
N2  - The radioactivity in natural samples like cosmogenic isotopes in meteorites, in Moon samples, in earth and ice in Antarctica, produced by protons, neutrons, ? 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. 
JF  - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 
N1  - Proceedings of the 12th Pisa Meeting on Advanced Detectors La Biodola, Isola d?Elba, Italy, May 20 ? 26, 2012 
A1  - Colombetti, Paolo
A1  - Taricco, Carla
A1  - Bhandari, Narendra
A1  - Sinha, Neeharika
A1  - Di Martino, M. 
A1  - Cora, A
A1  - Vivaldo, Gianna
SP  - 140 
VL  - 718
EP  -  142
PB  - Elsevier
KW  - Gamma-Ray spectroscopy; Cosmogenic radionuclides; Meteorites; Cosmic ray flux; Coincidence techniques
UR  - http://www.sciencedirect.com/science/article/pii/S0168900212008455
TI  - Low gamma activity measurement of meteorites using HPGe?NaI detector system 
ID  - eprints2364
AV  - none
ER  -