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Compton polarimetry with a 36-fold segmented HPGe-detector of the AGATA-type

B. Alikhani ; A. Givechev ; Andreas Martin Heinz (Institutionen för fundamental fysik, Subatomär fysik) ; P. R. John ; J. Leske ; M. Lettmann ; O. Moller ; N. Pietralla ; C. Roder
Nuclear Instruments & Methods in Physics Research Section a-Accelerators Spectrometers Detectors and Associated Equipment (0168-9002). Vol. 675 (2012), p. 144-154.
[Artikel, refereegranskad vetenskaplig]

The calibration of a highly-segmented AGATA-type HPGe-detector as a gamma-ray Compton polarimeter and a method for (quasi-)continuous angle Compton polarimetry are presented. The high granularity, combined with the large detection efficiency of the AGATA-type HPGe-crystals, offers a significant advantage for polarization measurements of gamma-radiation. A polarization-directional correlation experiment with gamma-rays from a Co-60 source with an activity of about 680 kBq was used to determine the polarization sensitivity of a single AGATA-type HPGe-crystal at 1173 and 1332 key and to demonstrate the method. The polarization measurement was based on segment information. In our set-up a polarization sensitivity of 19% at 1332 keV has been achieved.

Nyckelord: Compton polarimeter, Segmented HPGe-detectors, Compton-tracking polarimetry, polarization, polarization sensitivity, parity assignments, array, scattering



Denna post skapades 2012-05-21. Senast ändrad 2015-03-30.
CPL Pubid: 157798

 

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Institutioner (Chalmers)

Institutionen för fundamental fysik, Subatomär fysik (2005-2013)

Ämnesområden

Fysik

Chalmers infrastruktur