Gamma-ray tracking with the MARS detector

The lineshapes and peak position of Doppler corrected gÀray spectra from in-beam experiments at relativistic energies are investigated with respect to the intrinsic energy resolution of the employed detectors, the particles' velocities, and the photons' emission angle uncertainties at the moment of gÀray emission. The uncertainties in velocity and photon emission angle are dependent on the lifetime of the excited state. The impact of these two observables on the lineshape and energy resolution are studied for the RISING gÀspectrometer by means of simulations and experimental results from a twostep fragmentation experiment at % 200 MeV=u. Potential use of the distinct lineshape for lifetime determination is demonstrated for measured gÀray transitions.

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Response of AGATA segmented HPGe detectors to gamma rays up to 15.1MeV

Crespi

Avigo

Camera

et al. 2013

Nuclear Instruments and Methods in Physics Research Section A:

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a b s t r a c tThe response of AGATA segmented HPGe detectors to gamma rays in the energy range 2-15 MeV was measured. The 15.1 MeV gamma rays were produced using the reaction d( 11 B,ng) 12C at E beam ¼ 19.1 MeV, while gamma rays between 2 and 9 MeV were produced using an Am-Be-Fe radioactive source. The energy resolution and linearity were studied and the energy-to-pulse-height conversion resulted to be linear within 0.05%.Experimental interaction multiplicity distributions are discussed and compared with the results of Geant4 simulations. It is shown that the application of gamma-ray tracking allows a suppression of background radiation caused by n-capture in Ge nuclei. Finally the Doppler correction for the 15.1 MeV gamma line, performed using the position information extracted with Pulse-shape analysis is discussed.

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Gamma-ray tracking with the MARS detector

Cited by 8 publications

References 3 publications

A genetic algorithm for the decomposition of multiple hit events in the γ-ray tracking detector MARS

A genetic algorithm for the decomposition of multiple hit events in the γ-ray tracking detector MARS

In-beam experiment with the γ-ray tracking detector MARS

Response of AGATA segmented HPGe detectors to gamma rays up to 15.1MeV

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