Effect of large-angle incidence on particle identification performance for light-charged (Z ≦ 2) particles by pulse shape analysis with a pad-type nTD silicon detector

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  • Effect of large-angle incidence on particle identification performance for light-charged (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.svg" display="inline" id="d1e252"><mml:mrow><mml:mi>Z</mml:mi><mml:mo linebreak="goodbreak" linebreakstyle="after">≤</mml:mo><mml:mn>2</mml:mn></mml:mrow></mml:math>) particles by pulse shape analysis with a pad-type nTD silicon detector
Published
2024-02
Resource Type
journal article
DOI
  • 10.1016/j.nima.2023.168984
Publisher
Elsevier

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Description

In recent years, particle discrimination methods based on digital waveform analysis techniques for neutron-transmutation-doped silicon (nTD-Si) detectors have become widely used for the identification of low-energy charged particles. Although the particle discrimination capability of this method has been well demonstrated for small incident angles, the particle discrimination performance may be affected by changes in the detector response when the detector is moved closer to the charged particle source and the incident position distribution and incident angle distribution to the detector become wide. In this study, we performed a beam test for particle discrimination in light-charged (Z ≦ 2) particles using the digital waveform analysis method with a pad-type nTD-Si detector and investigated the dependence of the performance of the particle discrimination on the incident position and incident angle. As the incident angle increased, a decrease in the maximum current was observed, which was sufficient to affect the performance of the particle discrimination. This decrease can be expressed as a function of the penetration depth of the charged particles into the detector, which varies for each nuclide.

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