On Estimation Methods of Depolarization Losses for Ultracold Neutrons in Magnetic Traps

Cover Page

Cite item

Full Text

Open Access Open Access
Restricted Access Access granted
Restricted Access Subscription Access

Abstract

The problem of finding the depolarization losses of neutrons is investigated in connection with the need to determine the systematic error for experiments with magnetic storage of ultracold neutrons in traps. In this paper, we consider three methods to estimate the neutrons depolarization probability: classical, quantum mechanical and approximate one. They are used to estimate the depolarization probability of ultracold neutrons in two magnetic traps: the trap developed in Los Alamos National Laboratory (LANL) and the one designed in the neutron physics laboratory of “NRC Kurchatov Institute”—PNPI. It is shown that all three methods are successfully used to estimate depolarization. This is of particular importance to compare of theoretical predictions with the results of measurement in experiments to determine the neutron lifetime.

About the authors

G. N. Klyushnikov

Petersburg Nuclear Physics Institute named by B.P. Konstantinov, National Research Center “Kurchatov Institute”

Email: serebrov_ap@pnpi.nrcki.ru
Russia, 188300, Leningrad region, Gatchina

A. P. Serebrov

Petersburg Nuclear Physics Institute named by B.P. Konstantinov, National Research Center “Kurchatov Institute”

Author for correspondence.
Email: serebrov_ap@pnpi.nrcki.ru
Russia, 188300, Leningrad region, Gatchina

References

  1. C. Patrignani et al., Particle Data Group. Chin. Phys. C. 40, 100001 (2017).
  2. Владимирский В. В., ЖЭТФ. 4, 39, 1062 (1960).
  3. Ю. Ю. Косвинцев, Ю. А. Кушнир, В. И. Морозов и др., Письма в ЖЭТФ. 70, 27 (1978).
  4. Ю. Г. Абов, В. В. Васильев, В. В. Владимирский и др., Письма в ЖЭТФ. 369, 44 (1986).
  5. В.Ф. Ежов и др., Письма в ЖТФ. 24, 64. (2001).
  6. В. Ф. Ежов, В. Л. Рябов, Письма в ЖЭТФ. 117, 93 (2023).
  7. Ю.А. Мостовой, К.Н. Мухин, О.О. Патаракин, Нейтрон вчера, сегодня, завтра, УФН 166, 987 (1996).
  8. F. Wietfeldt and G.L. Greene, The Neutron Lifetime, Rev. of Mod. Phys. 83, 1173 (2011).
  9. W. Paul and F. Anton, Z. Phys. C Particles and Fields 45, 25 (1989).
  10. J. M. Robson, Phys.Rev. 83, 349 (1951).
  11. P. E. Spivak et al., JETP Lett. 67, 1735 (1988).
  12. A. T. Yue, M. S. Dewey, D. M. Gilliam et al., Phys. Rev. Lett. 111, 222501 (2013).
  13. R. W. Jr. Pattie, N. B. Callahan, C. Cude-Woods et al., Science 11; 360 (6389):627 (2018); doi: 10.1126/science.aan8895. Epub 2018 May 6. PMID: 29731449.
  14. A. P. Serebrov et al., Phys. Lett. B 605, 72 (2005).
  15. A. P. Serebrov and A. K. Fomin, Phys. Proc. 199, 17 (2011).
  16. А.П. Серебров, УФН 185, 1179 (2015).
  17. А. П. Серебров, УФН 189, 635 (2019).
  18. E. Majorana, Il Nuovo Cimento 9, 43 (1932).
  19. P. L. Walstrom et al., Nucl. Instrum. Methods Phys. Res. A 82, 599 (2009).
  20. A. Steyerl et al., Phys. Rev. C 86, 065501 (2012).
  21. Yu. N. Pokotilovski, JETP Lett. 76, 131 (2002)
  22. , 422(E) (2003).
  23. H. Kuwabara, Y. Yamauchi, and A. Pratt, J. of the Kor. Phys. Soc. 62, 1286 (2013).
  24. J. Schwinger, Phys. Rev. 51, 648 (1937).
  25. I. I. Rabi, Phys. Rev. 51, 652 (1937).
  26. I. I. Rabi, N. F. Ramsey, and J. Schwinger, Rev. Mod. Phys. 26, 167 (1954).
  27. И. М. Матора, Ядерная физика 16, 624 (1972).
  28. A. Saunders, D. Salvat, E. Adamek et al., UCNτ: Study of Lifetime Measurement in a Magneto-Gravitational Trap/Next Generation Experiments to Measure the Neutron Lifetime, (2014) p. 135.

Supplementary files

Supplementary Files
Action
1. JATS XML
Download

Copyright (c) 2023 Russian Academy of Sciences