DALI2: A NaI(Tl) detector array for measurements of gamma rays from fast nuclei

作者：Takeuchi S^*; Motobayashi T; Togano Y; Matsushita M; Aoi N; Demichi K; Hasegawa H; Murakami H

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2014, 763: 596-603.

DOI：10.1016/j.nima.2014.06.087

• Scintillation detector
• In beam gamma-ray spectroscopy
• Radioactive beam experiment

A NaI(Tl) detector array called DALI2 (Detector Array for Low Intensity radiation 2) has been constructed for in beam gamma-ray spectroscopy experiments with fast radioactive isotope (RI) beams. It consists typically of 186 NaI(Tl) scintillators covering polar angles from similar to 15 degrees to similar to 160 degrees with an average angular resolution of 6 degrees in full width at half maximum. Its high granularity (good angular resolution) enables Doppler-shift corrections that result in, for example, 10% energy resolution and 20% full energy photopeak efficiency for 1-MeV gamma rays emitted from fast-moving nuclei (velocities of v/c similar or equal to 0.6). DALI2 has been employed successfully in numerous experiments using fast RI beams with velocities of v/c=0.3-0.6 provided by the RIKEN RI Beam Factory.

• 出版日期2014-11-1