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

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A. A. Kurteva^1,*, V. E. Mitroshin<sup>2

1</sup> Institute for Nuclear Research, National Academy of Sciences of Ukraine, Kyiv, Ukraine
² V. N. Karazin Kharkiv National University, Kharkiv, Ukraine

^*Corresponding author. E-mail address: ann.kurteva17@gmail.com

Abstract: Results of calculations in the framework of the dynamic collective model of probabilities of beta-transitions for more than 20 nuclei with mass numbers from А = 31 to А = 231 with one universal renormalization of weak interaction constants are presented. The quasi-particle and many-phonon (up to 10 phonons) states, as well as vacuum fluctuations of quasi-particles were taken into account. The calculated values lg ft show good agreement with the experimental data. In the aggregate the results of the calculations show that suppression of weak forces in nuclei does not depend on mass number and energy of states excited in beta-decay.

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

1. J. Fujita, K. Ikeda. Existence of isobaric states and beta decay of heavier nuclei. Nucl. Phys. A 67 (1965) 145. https://doi.org/10.1016/0029-5582(65)90119-7

2. A.B. Migdal. Theory of Finite Fermi Systems and Properties of Atomic Nuclei (Moskva: Nauka, 1983) 430 p. (Rus) Google books

3. V.E. Mitroshin. On the description of atomic nuclei with an odd mass number. Preprint of the Leningrad Institute of Nuclear Physics LINP-441 (Leningrad, 1978) 25 p. (Rus)

4. V.E. Mitroshin. On the description of nuclei with an odd mass number. Izvestiya AS USSR. Ser. Fiz. 44 (1980) 986. (Rus)

5. G.B. Krygin, V.E. Mitroshin. Charge radii and structure of atomic nuclei. Sov. J. Part. Nucl. 16 (1985) 927. (Rus) http://www1.jinr.ru/Archive/Pepan/1985-v16/v-16-4/5.htm

6. I.N. Vishnevsky et al. Probabilities of beta transitions and nuclear structure. Phys. At. Nucl. 57 (1994) 17. (Rus)

7. A.A. Kurteva. Beta-decay ¹²⁵I→¹²⁵Te. Yaderna Fizyka ta Energetyka (Nucl. Phys. At. Energy) 17(2) (2016) 150. (Rus) https://doi.org/10.15407/jnpae2016.02.150

8. V.E. Mitroshin. Dynamic collective model. Even-even nuclei. Phys. At. Nucl. 68 (2005) 1314. https://doi.org/10.1134/1.2011494

9. I.N. Vishnevsky et al. Beta decay of ⁹⁷Ru→⁹⁷Tc. Izvestiya RAS. Ser. Fiz. 62 (1998) 893. (Rus)

10. І.М. Vishnevsky, G.P. Kurteva, V.E. Mitroshin. Structure of excited states of the nucleus ⁹⁵Mo and beta-decay ⁹⁵Тs → ⁹⁵Мо. Ukr. J. Phys. 47(2) (2002) 125. (Ukr) http://archive.ujp.bitp.kiev.ua/files/journals/47/2/47_02_03.pdf

11. I.M. Vyshnevskyi, А.А. Кurteva, V.E. Мitroshin. Collective effects for β-decay of odd nuclei. In: Proc. of the Int. Conf. “Current Problems in Nucl. Phys. and At. Energy”, Kyiv, Ukraine, May 29 - June 03, 2006 (Kyiv, 2007) p. 225. (Rus) http://www.kinr.kiev.ua/NPAE_Kyiv2006/proc/Vyshnevskyi_1.pdf

12. A.A. Kurteva, V.E. Mitroshin. Structure of excited states of ¹²³Te. Bull. Russ. Acad. Sci. Phys. 73 (2009) 1499. https://doi.org/10.3103/S1062873809110173

13. A.A. Kurteva, V.E. Mitroshin. ¹²³I → ¹²³Te beta decay. Bull. Russ. Acad. Sci. Phys. 73 (2009) 1502. https://doi.org/10.3103/S1062873809110185

14. A.A. Kurteva, V.E. Mitroshin. Accounting for collective degrees of freedom in beta decay of odd nuclei. Bull. Russ. Acad. Sci. Phys. 74 (2010) 881. https://doi.org/10.3103/S1062873810060316

15. A.A. Kurteva, V.E. Mitroshin. Beta decay ¹⁰⁷Cd →¹⁰⁷Ag and ¹⁰⁹Cd → ¹⁰⁹Ag. Bull. Russ. Acad. Sci. Phys. 75 (2011) 580. https://doi.org/10.3103/S1062873811040307

16. Evaluated Nuclear Structure Data File. https://www.nndc.bnl.gov/ensdf/

17. J.K. Tuli. Nuclear Data Sheets 38 (1983) 1. https://doi.org/10.1016/S0090-3752(83)80100-8

18. J. Blachot, F. Haas. Nuclear data sheets update for A=111. Nuclear Data Sheets 60 (1990) 889. https://doi.org/10.1016/S0090-3752(05)80110-3

19. J. Toivanen, J. Suhonen, Microscopic quasiparticle-phonon description of odd-mass ^127-133Xe isotopes and their β-decay. Phys. Rev. C 57 (1998) 1237. https://doi.org/10.1103/PhysRevC.57.1237

20. V.A. Kuzmin. The structure of spherical nuclei and charge-exchange processes at low and intermediate energies. PhD Thesis (Dubna, JINR, 2002). (Rus)