TY  - JOUR
VL  - 572
SP  - 241 
A1  - Taricco, Carla
A1  - Bhandari, Narendra
A1  - Colombetti, Paolo
A1  - Verma, Neeharika
A1  - Vivaldo, Gianna
PB  - Elsevier
JF  - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 
IS  - 1
Y1  - 2007///
EP  -  243
N1  - Frontier Detectors for Frontier Physics Proceedings of the 10th Pisa Meeting on Advanced Detectors 
ID  - eprints2348
N2  - We have developed a highly efficient and selective gamma-ray spectrometer with extremely low background for activity measurement of gamma emitting cosmogenic radionuclides in meteorites. This spectrometer can operate in specific modes to match decay scheme of a particular radionuclide and is specially suited for measurement of positron emitters. The system consists of a hyperpure Ge detector (3 kg, 147 relative efficiency), operating in coincidence with an umbrella of NaI(Tl) scintillator (90 kg) in order to achieve low background. The system is tuned such that strong interference due to naturally occurring uranium daughters, e.g. 214Bi present in the meteorites and in the laboratory environment, is minimized. It enables us to measure 44Ti ( T 1 / 2 = 59.2 y ) which is ideal for studying centennial scale variations of cosmic ray flux in the interplanetary space with good reliability. The specific configuration of the coincidence system and electronics are described here. 
SN  - 0168-9002
UR  - http://www.sciencedirect.com/science/article/pii/S0168900206020742
TI  - Experimental set-up and optimization of a gamma-ray spectrometer for measurement of cosmogenic radionuclides in meteorites 
AV  - none
KW  - Coincidence techniques 
ER  -