• Fulltext

       

        Click here to view fulltext PDF


      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/063/02/0471-0475

    • Keywords

       

      Microstrip gas counters; gas-filled proportional counters; position-sensitive detectors; neutron scattering and diffraction

    • Abstract

       

      A gas-filled microstrip detector for thermal neutrons has been built and successfully tested in our laboratory. The detector has an active area of 20 mm × 15 mm and consists of alternate anodes and cathodes of widths 12 μm and 300 μm respectively. The anode to cathode gap is 150 μm and the pitch is 612 μm. A high resistance, meandering type horizontal strip connects the anodes at one end and aids in position sensing by charge division method. The detector is tested with gas mixtures3He+Kr (1: 2) and3He+CF4 (2:1) at pressure of 3 atmospheres and using a Pu-Be neutron source. The pulse height spectrum shows energy resolution of ∼8% (FWHM) for the 764 keV peak at anode voltage of 525 V for3He+Kr and ∼15% at anode voltage of 800 V for3He+CF4. Gas gains up to 6.3 × 103 and 3.6 × 103 are obtained respectively with these gas mixtures. The overall efficiency of the detector along the sensitive length is tested by exposing the active area to neutrons and recording the position spectrum. The detector shows fairly uniform efficiency (∼45%) over the active length.

    • Author Affiliations

       

      S S Desai1 A M Shaikh1 V Radhakrishna2 K Rajanna2

      1. Solid State Physics Division, Bhabha Atomic Research Centre, Mumbai - 400 085, India
      2. Department of Instrumentation, Indian Institute of Science, Bangalore - 560 012, India
    • Dates

       
  • Pramana – Journal of Physics | News

    • Editorial Note on Continuous Article Publication

      Posted on July 25, 2019

      Click here for Editorial Note on CAP Mode

© 2017-2019 Indian Academy of Sciences, Bengaluru.