Nuclear Physics and Atomic Energy

ßäåðíà ô³çèêà òà åíåðãåòèêà
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

  Open access peer reviewed journal


 Home page   About 
Nucl. Phys. At. Energy 2018, volume 19, issue 1, pages 5-13.
Section: Nuclear Physics.
Received: 13.12.2017; Accepted: 22.03.2018; Published online: 12.05.2018.
PDF Full text (ua)
https://doi.org/10.15407/jnpae2018.01.005

Average angular momenta of the fragments in 238U photof³ss³on with bremsstrahlung

². M. Vyshnevsky³1, V. O. Zheltonozhsky1, A. M. Savrasov1,*, V. À. Plujko2, Î. Ì. Gorbachenko2, K. Ì. Solodovnyk2

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


*Corresponding author. E-mail address: asavrasov@kinr.kiev.ua

Abstract: Based on 238U photofission experiments with the bremsstrahlung photons, the isomeric yield ratios were measured for 95Nb and 133Xe nuclei at the end-point energy Ee = 12.5 MeV, and 135Xe nuclei at Ee = 12.0 MeV. Experimental values of isomeric yield ratios were obtained taking into account the contribution from beta-decay of isobaric nuclei in yields of investigated isotopes. Average angular momenta of investigated fission fragments were determined using the statistical model of decay.

Keywords: photofission, isomeric yields ratios, mean angular momenta of fission fragments.

References:

1. 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. https://doi.org/10.1103/PhysRevC.71.014304

2. O.A. Bezsheyko, V.A. Zheltonozhsky, I.N. Kadenko, N.V. Strilchuk. Measurement of isomeric ratios in 232Th photofission products. Zbirnyk Naukovykh Prats Instytutu Yadernykh Doslidzhen 8 (2002) 46 (Rus) https://jnpae.kinr.kyiv.ua/03.2/Articles_PDF/jnpae-2002-03-2-046.pdf

3. I.N. Vyshnevskyi, V.A. Zheltonozhskyj, O.I. Davidovskaya, A.N. Savrasov. Investigation of the 232Th and 238U photofission. Bull. Russ. Acad. Sci. Phys. 73 (2009) 733. (Rus) https://doi.org/10.3103/S1062873809060094

4. H. Thierens et al. Product yields for the photofission of 235U and 238U with 25-MeV bremsstrahlung. Phys. Rev. C 14 (1976) 1058. https://doi.org/10.1103/PhysRevC.14.1058

5. E. Jacobs et al. Product yields for the photofission of 238U with 12-, 15-, 20-, 30-, and 70-MeV bremsstrahlung. Phys. Rev. C 19 (1979) 422. https://doi.org/10.1103/PhysRevC.19.422

6. E. Jacobs et al. Product yields for the photofission of 235U with 12-, 15-, 20-, 30-, and 70-MeV bremsstrahlung. Phys. Rev. C 21 (1980) 237. https://doi.org/10.1103/PhysRevC.21.237

7. H. Thierens, B. Proot, D. De. Frenne, E. Jacobs. Independent isomeric yield ratio of 134I in the photofission of 235U and 238U. Phys. Rev. C 25 (1982) 1546. https://doi.org/10.1103/PhysRevC.25.1546

8. D. De. Frenne et al. Independent isomeric yield ratios and primary angular momenta in the photofission of 235,238U with 12-30-MeV bremsstrahlung. Phys. Rev. C 29 (1984) 1777. https://doi.org/10.1103/PhysRevC.29.1777

9. Î.À. Bezshyyko et al. Isomeric ratio study of photofission fragments of 238U and 237Np. Zbirnyk Naukovykh Prats Instytutu Yadernykh Doslidzhen 13 (2004) 17 (Rus) https://jnpae.kinr.kyiv.ua/05.2/Articles_PDF/jnpae-2004-05-2-017.pdf

10. O.A. Bessheiko et al. Isomeric ratios and mean angular momenta for 238U and 237Np photofission products. Izvestiya Rossiiskoi AN. Ser. Fiz. 69 (2005) 745. (Rus)

11. I.N. Vishnevskii, O.I. Davidovskaya, V.A. Zheltonozhskii, A.N. Savrasov. Investigation of 235U and 239Pu photofission. Bull. Russ. Acad. Sci. Phys. 74 (2010) 500. (Rus) https://doi.org/10.3103/S1062873810040167

12. I.N. Vishnevskii, V.A. Zheltonozhskii, A.N. Savrasov. Investigating 237Np and 241Am photofission. Bull. Russ. Acad. Sci. Phys. 76 (2012) 901. (Rus) https://doi.org/10.3103/S106287381208028X

13. I.M. Vyshnevskyi et al. Isomeric yield ratios and mean angular momenta of photofission fragments of 235U, 237Np and 239Pu. Yaderna Fizyka ta Energetyka (Nucl. Phys. At. Energy) 16 (2015) 5. (Rus) https://jnpae.kinr.kyiv.ua/16.1/Articles_PDF/jnpae-2015-16-0005-Vyshnevskyi.pdf

14. I.N. Vishnevsky et al. Isomeric yields ratios of 238U photofission fragments at end-point energy of bremmsstrahlung photons about 18 MeV. Abstracts of the LXIV Intern. Conf. on Nuclear Physics "Nucleus 2014" (Minsk, July 01-04, 2014) (Minsk, 2014), p. 88. http://inp.bsu.by/nucleus/Nucleus_2014_Abstracts.pdf

15. 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. (Ukr)

16. I.M. Vyshnevskyi et al. Investigation of 233U and 241Am photofission fragments. Yaderna Fizyka ta Energetyka (Nucl. Phys. At. Energy) 15 (2014) 215. (Rus) https://jnpae.kinr.kyiv.ua/15.3/Articles_PDF/jnpae-2014-15-0215-Vyshnevskyi.pdf

17. R.B. Firestone, V.S. Shirley, C.M. Baglin. Table of isotopes. Eight ed. (1996). https://www.wiley.com//legacy/products/subject/physics/toi/

18. N.V. Strilchuk. The IZOMER manual. INR NASU, private communication.

19. I.N. Vishnevsky 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. https://jnpae.kinr.kyiv.ua/15.2/Articles_PDF/jnpae-2014-15-0111-Vyshnevskyi.pdf

20. R. Vandenbosch, J.R. Huizenga. Nuclear Fission (New York, Academic, 1973). Google Books

21. 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. https://doi.org/10.1016/0022-1902(64)80308-0

22. M. Herman et al. EMPIRE: nuclear reaction model code system for data evaluation. Nuclear Data Sheets 108 (2007) 2655. https://doi.org/10.1016/j.nds.2007.11.003; http://www.nndc.bnl.gov/empire

23. R. Capote et al. Reference Input Parameter Library (RIPL-3). Nuclear Data Sheets 110 (2009) 3107. https://doi.org/10.1016/j.nds.2009.10.004; https://www-nds.iaea.org/RIPL-3

24. V.A. Plujko, R. Capote, O.M. Gorbachenko. Giant dipole resonance parameters with uncertainties from photonuclear cross sections. Atomic Data and Nuclear Data Tables 97 (2011) 567. https://doi.org/10.1016/j.adt.2011.04.001

25. T. Belgya et al. Handbook for calculations of nuclear reaction data, RIPL-2. IAEA-TECDOC-1506 (Vienna, IAEA, 2006). https://www-nds.iaea.org/publications/tecdocs/iaea-tecdoc-1506

26. https://www-nds.iaea.org/exfor/exfor.htm

27. 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. https://doi.org/10.1103/PhysRevC.30.195