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.
Similar content being viewed by others
References
V. K. Antropov et al., “Injector of Low Energy Positrons,” At. Energ. 94(1), 68–70 (2003).
I. N. Meshkov et al., “Positron Storage Ring LEPTA,” in Proc. of ECOOL’03, Japan, 2003; Nucl. Instr. Meth. A 532, 172–176 (2004).
I. N. Meshkov et al., “Positron Storage Ring for Positronium and Antihydrogen Generation in Flight: The LEPTA Project,” in Proc. of LEAP’03; Nucl. Instr. Meth. B 214, 186–190 (2004).
A. P. Mills, Jr. and E. M. Gullikson, “Solid Neon Moderator for Producing Slow Positrons,” Appl. Phys. Lett. 49, 1121 (1986).
R. G. Greaves and C. M. Surko, “Solid Neon Moderator for Positron Trapping Experiments,” Can. J. Phys. 74, 445–448 (1996).
R. Khatri et al., “Improvement of Rare-Gas Solid Moderators by Using Conical Geometry,” Appl. Phys. Lett. 57, 2374–2376 (1990).
N. A. Lebedev et al., “The Method of Production of Positrons Source on the Base of 22Na,” in Proc. of 54 Intern. Symp. of Nucl. Spectroscopy and Atomic Nuclei Structure (Belgorod, 2004), p. 214.
V. N. Pavlov et al., “Positrons Injector for Storage Ring LEPTA,” Pisma Fiz. Elem. Chastits At. Yadra 3(7), 63–67 (2006).
Author information
Authors and Affiliations
Additional information
Original Russian Text © I.N. Meshkov, V.N. Pavlov, A.O. Sidorin, S.L. Yakovenko, 2008, published in Pis’ma v Zhurnal Fizika Elementarnykh Chastits i Atomnogo Yadra, 2008, No. 2 (144), pp. 167–170.
Rights and permissions
About this article
Cite this article
Meshkov, I.N., Pavlov, V.N., Sidorin, A.O. et al. Testing of a cryogenic source of slow monochromatic positrons. Phys. Part. Nuclei Lett. 5, 92–93 (2008). https://doi.org/10.1134/S1547477108020064
Received:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S1547477108020064