Nuclear Physics and Atomic Energy

Nuclear Physics and Atomic Energy

  ISSN: 1818-331X (Print), 2074-0565 (Online)
  Publisher: Institute for Nuclear Research of the National Academy of Sciences of Ukraine
  Languages: Ukrainian, English, Russian
  Periodicity: 4 times per year

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Nucl. Phys. At. Energy 2019, volume 20, issue 2, pages 126-130.
Section: Nuclear Physics.
Received: 08.04.2019; Accepted: 11.07.2019; Published online: 27.08.2019.
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Photofission of 238U with bremsstrahlung in wide interval of values of the boundary energy

V. O. Zheltonozhsky1, A. M. Savrasov1, V. . Plujko1,2, O. M. Gorbachenko2, K. M. Solodovnyk2,*

1 Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
2 Taras Shevchenko National University of Kyiv, Kyiv, Ukraine

*Corresponding author. E-mail address:

Abstract: In experiments for photofission of 238U with bremsstrahlung, the isomeric yield ratios for 133Xe at the end-point energies Ee = 6.25, 14.5 and 18 MeV and for 135Xe at Ee = 6.25, 12.5 and 14.5 MeV were measured. Isomeric yield ratios were obtained taking into account the contribution from beta-decay of isobaric nuclei to the yields of investigated isotopes. Average angular moments of investigated fission fragments were determined using the statistical model of decay.

Keywords: nucleus, quasiparticle, phonon, probabilities of beta-transitions, spectroscopic characteristics.


1. J.O. Rasmussen, W. Norenberg, H.J. Mang. A model for calculating the angular momentum distribution of fission fragments. Nucl. Phys. A. 136 (1969) 465.

2. M. Zielinska-Pfabe, K. Dietrich. Angular momentum distribution of fission fragments as a result of bending modes at the scission point. Phys. Lett. B 49 (1974) 123.

3. H. Naik, S.P. Dange, R.J. Singh. Angular momentum of fission fragments in low energy fission of actinides. Phys. Rev. C 71 (2005) 014304.

4. .M. Vyshnevsky et al. Average angular momenta of the fragments in 238U photofission with bremsstrahlung. Nucl. Phys. At. Energy 19 (2018) 5.

5. I.N. Vishnevskii et al. Investigation of 235U and 239Pu photofission. Bull. Russ. Acad. Sci. Phys. 74 (2010) 500.

6. I.N. Vishnevskii, V.A. Zheltonozhskii, A.N. Savrasov. Investigating 237Np and 241Am photofission. Bull. Russ. Acad. Sci. Phys. 76 (2012) 901.

7. I.M. Vyshnevskyi et al. Isomeric yield ratios and mean angular momenta of photofission fragments of 235U, 237Np and 239Pu. Nucl. Phys. At. Energy 16 (2015) 5.

8. I.M. Vyshnevskyi et al. Isomeric yields ratios of 238U photofission fragments at end-point energy of bremsstrahlung photons about 18 MeV. In: Abstracts of the LXIV Intern. Conf. on Nuclear Physics Nucleus 2014, Minsk, July 1 - 4, 2014 (Minsk, 2014) p. 88.

9. V.O. Zheltonozhskyi et al. Isomer ratios and mean angular momenta of primary 97Nb fragments at 235U and 238U photofission. Ukr. J. Phys. 62 (2017) 285.

10. I.M. Vyshnevskyi et al. Investigation of 233U and 241Am photofission fragments. Yaderna Fizyka ta Energetyka (Nucl. Phys. At. Energy) 15 (2014) 215.

11. R.B. Firestone, V.S. Shirley, C.M. Baglin. Table of Isotopes. CD-ROM. Eight Edition (1996).

12. M.V. Strilchuk. User Manual for Winspectrum. Private communication.

13. I.M. Vyshnevskyi et al. Isomer yield ratios of 133Te, 134I, 135Xe in photofission of 235U with 17 MeV bremsstrahlung. Yaderna Fizyka ta Energetyka (Nucl. Phys. At. Energy) 15 (2014) 111.

14. R. Vandenbosch, J.R. Huizenga. Nuclear Fission (New York: Academic Press, 1973) 422 p. Google books

15. H. Warhalek, R. Vandenbosh. Relative cross-sections for formation of the shielded isomeric pair 134mCs and 134Cs in medium energy fission. J. Inorg. Nucl. Chem. 26 (1964) 669.

16. A.J. Koning, S. Hilaire, M.C. Duijvestijn. TALYS-1.0. In: Proc. of the Intern. Conf. on Nuclear Data for Science and Technology ND2007, Nice, France, April 22 - 27, 2007 (Nice, 2007) p. 211.

17. M. Herman et al. EMPIRE: Nuclear Reaction Model Code System for Data Evaluation, Nucl. Data Sheets 108(12) (2007) 2655.

18. R. Capote et al. RIPL Reference Input Parameter Library for Calculation of Nuclear Reactions and Nuclear Data Evaluations. Nucl. Data Sheets 110 (2009) 3107.

19. O.A. Bessheiko et al. Isomeric ratios and mean angular momenta for 238U and 237Np photofission products. Bull. Russ. Acad. Sci. Phys. 69 (2005) 745.

20. G.P. Ford, K. Wolfsberg, B.R. Erdal. Independent yields of the isomers of 133Xe and 135Xe for neutron-induced fission of 233U, 235U, 238U, and 242mAm. Phys. Rev. C 30 (1984) 195.