Abstract
The results of testing a cryogenic source of slow monochromatic positrons based on the 22Na isotope, designed and constructed at JINR, are presented. A solid neon moderator was used to generate a monochromatic beam from the continuous β+ spectrum of 0–0.5 MeV, with solid neon being frozen to the base layer, which is cooled to the temperature of 5–7 K. Test source of the 22Na isotope allows the forming of a slow positron beam of intensity 5.8 × 103 part./s and the average energy 1.2 eV at a spectrum width of 1 eV. The efficiency of moderation is 1% of the total positron flux.
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