6533b835fe1ef96bd129eba3
RESEARCH PRODUCT
First tests of the applicability of gamma-ray imaging for background discrimination in time-of-flight neutron capture measurements
D. L. Pérez MagánL. Caballero-ontanayaC. Domingo-pardoJ. Agramunt-rosF. AlbiolA. CasanovasA. GonzálezC. GuerreroJ. Lerendegui-marcoA. Tarifeño-saldiviaThe N_tof Collaborationsubject
Nuclear and High Energy PhysicsPhotomultiplierPhysics - Instrumentation and DetectorsAstrophysics::High Energy Astrophysical PhenomenaNuclear physics01 natural scienceslaw.invention99-00Total energy detectorsOpticsData acquisitionRaigs gammalaw0103 physical sciencesγ-ray imagingmsc:00-01Detectors and Experimental TechniquesFacility n-tof010306 general physicsInstrumentationNuclear ExperimentNeutron capture cross-sectionsGamma cameraPhysicsNeutrons010308 nuclear & particles physicsbusiness.industryAstrophysics::Instrumentation and Methods for AstrophysicsTime-of-flight methodData-acquisition systemNeutron radiationSample (graphics)Pulse-height weighting techniqueNeutron captureTime of flightgamma-ray imagingCernPinhole (optics):Física::Física molecular [Àrees temàtiques de la UPC]Física nuclearbusinessSimulationdescription
In this work we explore for the first time the applicability of using $\gamma$-ray imaging in neutron capture measurements to identify and suppress spatially localized background. For this aim, a pinhole gamma camera is assembled, tested and characterized in terms of energy and spatial performance. It consists of a monolithic CeBr$_3$ scintillating crystal coupled to a position-sensitive photomultiplier and readout through an integrated circuit AMIC2GR. The pinhole collimator is a massive carven block of lead. A series of dedicated measurements with calibrated sources and with a neutron beam incident on a $^{197}$Au sample have been carried out at n_TOF, achieving an enhancement of a factor of two in the signal-to-background ratio when selecting only those events coming from the direction of the sample.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-10-08 |