Advertisement

The European Physical Journal A

, Volume 45, Issue 2, pp 251–255 | Cite as

Prompt gamma radiation from fission fragments due to the Strutinsky-Denisov polarisation

  • F. F. KarpeshinEmail author
Regular Article - Theoretical Physics

Abstract.

The hard electric dipole radiation from fission fragments of 235U by thermal neutrons is predicted. The radiation arises due to the Strutinsky-Denisov-induced polarisation mechanism. The probability of the radiation is at the level of 0.0025 per fission, which is in agreement with experiment. The angular distribution exhibits left-right asymmetry with respect to the plane perpendicular to the neutron polarisation axis. That means that the emission of gamma quanta at the given angle depends on the neutron polarisation. The asymmetry is at the level of 10-3. This effect is similar to that observed earlier for gamma quanta in binary and alphas in ternary fission. The study of this effect will give information about dissipation of the collective energy of the surface vibration in fragments with large amplitude, and gives a picture of the process of snapping back the nuclear surface.

Keywords

Angular Distribution Electric Dipole Electric Dipole Moment Asymmetry Parameter Fission Fragment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    V.A. Khodel, E.E. Saperstein, Phys. Rep. 92, No. 5 (1982)Google Scholar
  2. 2.
    A. Bohr, B. Mottelson, Nuclear Structure, Vol. II (W.A. Benjamin, Inc. New York, Amsterdam, 1974)Google Scholar
  3. 3.
    V.M. Strutinsky, At. Energ. 150, No. 4 (1956) (in Russian)Google Scholar
  4. 4.
    W.D. Myers, W.J. Swiatecky, Nucl. Phys. A 531, 93 (1991)CrossRefADSGoogle Scholar
  5. 5.
    V.Yu. Denisov, Yad. Fiz. 55, 2647 (1992)Google Scholar
  6. 6.
    V.Yu. Denisov, Yad. Fiz. 49, 644 (1989)Google Scholar
  7. 7.
    P.A. Butler, W. Nazarewicz, Rev. Mod. Phys. 68, 349 (1996)CrossRefADSGoogle Scholar
  8. 8.
    S. Aberg, H. Flockard, W. Nazarewicz, Annu. Rev. Nucl. Part. Sci. 40, 939 (1990)CrossRefGoogle Scholar
  9. 9.
    F.F. Karpeshin, M.A. Listengarten, I.M. Band, M.B. Trzhaskowskaya, Izv. Akad. Nauk, Ser. Fiz. 57, 15 (1993) (English transl: Bull. Russ. Acad. Sci., Phys. Ser. (U.S.A.) 57Google Scholar
  10. 10.
    F.F. Karpeshin, Fission in Muonic Atoms and Resonance Conversion (Nauka, St. Petersburg, 2006) (in Russian)Google Scholar
  11. 11.
    F.F. Karpeshin, Z. Phys. A 344, 55 (1992)CrossRefADSGoogle Scholar
  12. 12.
    F.F. Karpeshin, Yad. Fiz. 55, 2893 (1992)Google Scholar
  13. 13.
    G.Ye. Belovitsky, in Fiftieth Anniversary of Nuclear Fission, Proceedings of the International Conference, St. Petersburg, 1989, edited by L.V. Drapchinsky, Vol. 1 (V.G. Khlopin Radium Institute, St. Petersburg, 1992) p. 313Google Scholar
  14. 14.
    F.F. Karpeshin, in International School-Seminar on Heavy Ion Physics, edited by Yu.Ts. Oganessian, Yu.E. Penionzhkevich, R. Kalpakchieva, Vol. 1 (JINR, Dubna, 1993) p. 294, arXiv:0710.1743v1
  15. 15.
    Yu.P. Gangrsky, B.N. Markov, V.P. Perelygin, Registratsia i spektrometria oskolkov delenia (Energoizdat, Moscow, 1992) (in Russian) (English transl.: Registration and Spectrometry of the Fission Fragments)Google Scholar
  16. 16.
    R.W. Peelle, F.S. Meienshein, Phys. Rev. C 3, 373 (1971)CrossRefADSGoogle Scholar
  17. 17.
    H. van der Ploeg et al., Phys. Rev. Lett. 68, 3145 (1992)CrossRefADSGoogle Scholar
  18. 18.
    H. van der Ploeg, KVI annual report, 1991, p. 17Google Scholar
  19. 19.
    G.V. Danilyan, invited talk at the XLI PNPI Winter School on the Nuclear and Particle Physics, St. Petersburg, Repino, 19--24 February 2007Google Scholar
  20. 20.
    G.V. Danilyan, invited talk at the ISINN-2009, June 11-14, 2008, Dubna, RussiaGoogle Scholar
  21. 21.
    F. Goennenwein, M. Mutterer, A. Gagarski, I. Guseva, G. Petrov et al., Phys. Lett. B 652, 13 (2007)CrossRefADSGoogle Scholar
  22. 22.
    G.V. Danilyan, T. Wiltert, P. Granz et al., J. Phys. At. Nucl. 71, 2036 (2008)Google Scholar
  23. 23.
    G.V. Valsky, A.M. Gagarsky, I.S. Guseva, D.O. Krinitsin, G.A. Petrov et al., Bull. Russ. Acad. Sci. Phys. 74, 803 (2010)CrossRefGoogle Scholar
  24. 24.
    J. Halpern, Annu. Rev. Nucl. Sci. 21, 245 (1971)CrossRefADSGoogle Scholar
  25. 25.
    C. Rizzo et al., Phys. Rev. C 79, 021603 (2009)CrossRefMathSciNetADSGoogle Scholar
  26. 26.
    V. Baran et al., Phys. Rev. Lett. 87, 182501 (2001)CrossRefADSGoogle Scholar
  27. 27.
    I. Skwira-Chalot et al., Phys. Rev. Lett. 101, 262701 (2008)CrossRefADSGoogle Scholar
  28. 28.
    J. Wilczynski et al., Phys. Rev. C 81, 024605 (2010)CrossRefADSGoogle Scholar
  29. 29.
    F.F. Karpeshin, A. Vieira, C. Fiolhais, J. da Providencia jr., Europhysics Lett. 42, 149 (1998)CrossRefADSGoogle Scholar
  30. 30.
    L.D. Landau, E.M. Lifshitz, The Classical Theory of Fields, fourth edition (1994)Google Scholar
  31. 31.
    A. Wiswesser, GSI annual report (1991) p. 79Google Scholar
  32. 32.
    K. Skarsvag, Phys. Rev. C 22, 638 (1980)CrossRefADSGoogle Scholar
  33. 33.
    F.F. Karpeshin, Nucl. Phys. A 617, 211 (1997)CrossRefADSGoogle Scholar
  34. 34.
    A.R. Edmonds, Angular Moments in Quantum Mechanics, CERN 55-26 (1955)Google Scholar
  35. 35.
    D.M. Brink, in Fission Dynamics of Atomic Clusters and Nuclei, edited by J. da Providencia, D.M. Brink, F. Karpechine, F.B. Malik (World Scientific, New Jersey, London, Singapore, Hong Kong, 2001) p. 248Google Scholar
  36. 36.
    S.J. Luke, C.A. Gosset, R. Vandenbosch, Phys. Rev. C 44, 1548 (1991)CrossRefADSGoogle Scholar
  37. 37.
    F.F. Karpeshin, in Physics of Atomic Nuclei and Particles, Proceedings of the XLI and XLII Winter Schools, Saint-Petersburg (PNPI RAS, 2008) p. 216Google Scholar

Copyright information

© SIF, Springer-Verlag Berlin Heidelberg 2010

Authors and Affiliations

  1. 1.University of Buenos AiresBuenos Aires CityArgentina
  2. 2.St. Petersburg State UniversitySaint PetersburgRussia

Personalised recommendations