Ядерна фізика та енергетика 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

Full Text (ru)

Abstract: Conversion spectrum of the K- and L-lines of E0-transitions was studied with high-resolution magnetic spectrometer π√2. The intensity of the E0-transitions (in relation to the most intense transition of 328 keV) is: 1479 keV, I_k = 2.00(5); 1547 keV, I_k = 6.1(5)⋅10^-2; 2085 keV, I_k = 1.10(5)⋅10^-1. For the first time, measurements of the L-peaks of the E0-transition in the region of more than 1 MeV have been made and the relation L₁ / L₂ = 26(7) for 1479 keV has been established. Based on the measurements, the values of parameters q² and X were calculated for: 1479 keV - q² = 11.5(9), X = 0.44(6); 1547 keV - q² = 0.47(6), X = 0.020(4); 2085 keV - q² = 61(2), X = 5.6(3). Comparison was made with existing nuclear models.

1. G. Backstorm, O. Bergman, J. Bergman et al., The decay ¹⁹⁴Au, Nucl. Phys. 15 (1960) 566 - 608; https://doi.org/10.1016/0029-5582(60)90358-8
O. Bergman, G. Backstorm, Multipolarities of transitions in the decay of ¹⁹⁴Au to ¹⁹⁴Pt, Nucl. Phys. 55 (1964) 529 - 558. https://doi.org/10.1016/0029-5582(64)90176-2

2. V.A. Ageev, V.I. Gavrilyuk, V.T. Kupryashkin et al., Conversion-Electron Spectrum of ¹⁹⁴Au, Izv. Akad. Nauk SSSR. Ser. Fiz. 34 (1970) 1618 - 1626; Bull. Acad. Sci. USSR. Phys. Ser. 34 (1971) 436.

3. I.N. Vishnevskii, V.I. Gavrilyuk, V.T. Kupryashkin et al., Decay of ¹⁹⁴Au // Izv. Akad. Nauk SSSR. Ser. Fiz. 35 (1971) 2213 - 2231; Bull. Acad. Sci. USSR. Phys. Ser. 35 (1972) 2009.

4. S.F. Dorsett, K.S. Krane, The decay of ¹⁹⁴Au to levels in ¹⁹⁴Pt, Applied Radiation and Isotopes 103 (2015) 135 - 142. https://doi.org/10.1016/j.apradiso.2015.05.018

5. Ts. Vylov, A.A. Klyuchnikov, V.T. Kupryashkin et al., Izvestiya AN SSSR. Ser. Fiz. 41 (1977) 64 - 65. (Rus)

6. B. Singh, Nuclear Data Sheets for A = 194, Nucl. Data Sheets 107 (2006) 1531 - 1746. https://doi.org/10.1016/j.nds.2006.05.004

7. E.L. Church, J. Weneser, Electric-Monopole Transitions in Atomic Nuclei, Phys. Rev. 103 (1956) 1035. https://doi.org/10.1103/PhysRev.103.1035

8. J.P. Davidson, Electric Monopole Transitions and Beta Bands in Even Nuclei, Nucl. Phys. 86 (1966) 561 - 573. https://doi.org/10.1016/0029-5582(66)90497-4

9. М.A. Listengarten, I.M. Band, Effect of Screening on the Probability of E0-Conversion on the K and L Shells at Low Energies, Izv. Akad. Nauk SSSR. Ser. Fiz. 23 (1959) 235; Columbia Tech. Transl. 23 (1960) P. 225.

10. J.O. Rasmussen, Theory of E0 transitions of spheroidal nuclei, Nucl. Phys. 19 (1960) 85. https://doi.org/10.1103/PhysRev.109.1299

12. O. Bor, B. Mottelson, The Structure of the Atomic Nucleus (translation from English). Vol. 1, Moskva (1971). (Rus) Google books

13. A.S. Davydov, A.A. Chaban, Rotation-vibration interaction in non-axial even nuclei, Nucl. Phys. 20 (1966) 499 - 508. https://doi.org/10.1016/0029-5582(60)90191-7

14. K. Kumar, M. Baranger, Nuclear deformations in the pairing-plus-quadrupole model: (V). Energy levels and electromagnetic moments of the W, Os and Pt nuclei, Nucl. Phys. A 122 (1968) 273. https://doi.org/10.1016/0375-9474(68)90045-6

15. T. Kibedi, R.H. Spear, Electric monopole transitions between 0⁺ states for nuclei throughout the periodic table, At. Data Nucl. Data Tables 89 (2005) 77. https://doi.org/10.1016/j.adt.2004.11.002

16. J.V. Maher, J.R. Erskine, A.M. Friedman et al., Population of 0⁺ States in Actinide and A = 190 Nuclides by the (p, t) Reaction, Phys. Rev. C 5 (1972) 1380. https://doi.org/10.1103/PhysRevC.5.1380