SHELL EFFECTS IN THE FISSION OF 236U* NUCLEI, FORMED IN THE REACTION 232Th(α,f) AT INCIDENT ALPHA PARTICLES ENERGY OF 29 MeV
https://doi.org/10.52676/1729-7885-2023-2-4-8
Abstract
Mass and energy distribution of fission fragments of 236U* nuclei, formed in the reaction 232Th(α,f) at incident alpha energy of 29 MeV were studied to reveal the influence of shell effects. The experiment was carried out by 2E method at U-150M accelerator at Institute of Nuclear Physics, Almaty city. Acquired experimental data was decomposed into yields of separate shells, including deformed shells, assuming that the shell yield has the form of gauss distribution. The manifestation of deformed shells N84, Z52 and deformed shells Z36, Z38 was revealed.
About the Authors
A. N. PanKazakhstan
Andrey Nikolayevich Pan
Almaty
N. Burtebayev
Kazakhstan
Nassurlla Burtebayev - Professor of Theoretical and Nuclear Physics Department of Kazakh National University.
Almaty
K. V. Kovalchuk
Kazakhstan
Kirill Vladimirovich Kovalchuk
Almaty
T. N. Kvochkina
Kazakhstan
Kirill Vladimirovich Kovalchuk
Almaty
References
1. K.B. Gikal et al., Proton induced fission of 232Th at intermediate energies, Physics of Atomic Nuclei, pp. 1367-1374, No. 9-10, Vol. 79, 2016.
2. U. Brosa et. al., Nuclear Scission, Phys. Rep. 197, 167, 1990.
3. G.Scamps & C.Simenel, Impact of pear-shaped fission fragments on mass-asymmetric fission in actinides , Nature, vol. 564, 382, 2018.
4. E.M. Kozulin et. al., Fisiion of 180,182,183Hg* and 178Pt* nuclei at intermediate excitation energies, Phys. Rev. C, 105, 014607, 2022.
5. A.A. Bogachev et. al., Asymmetric and symmetric fission of excited nuclei of 180,190Hg and 184,192,202Pb formed in the reactions with 36Ar and 40,48Ca ions, Phys. Rev. C, 104, 024623, 2021.
6. N.A. Kondratiev, S.I. Mulgin, V.N. Okolovich, A.Ya. Rusanov, Sov. J.: Prib. Tekh. Eksp., 62, 2, 1990.
7. S.I. Mulgin et al., The modal structure of fragment mass and energy yields from the 10.3-30.0 MeV proton induced fission of 232Th and 235U, Nucl. Phys. A, 1-23, 824, 2009.
8. H.W. Schmitt et. al, Preision Measurements of Correlated Energies and Velocities of 252Cf Fission Fragments, Phys. Rev., B837, 137, 1965
9. S.I. Mulgin et. al., Two-parametric method for silicon detector calibration in heavy ion and fission fragment spectrometry, Nucl. Instrum. Methods A, 388, 254, 1997.
10. C.Bockstiegel et at., Nuclear-fission studies with relativistic secondary beams: Analysis of fission channels, Nucl. Phys. A, 12-25, 802, 2008.
Supplementary files
Review
For citations:
Pan A.N., Burtebayev N., Kovalchuk K.V., Kvochkina T.N. SHELL EFFECTS IN THE FISSION OF 236U* NUCLEI, FORMED IN THE REACTION 232Th(α,f) AT INCIDENT ALPHA PARTICLES ENERGY OF 29 MeV. NNC RK Bulletin. 2023;(2):4-8. https://doi.org/10.52676/1729-7885-2023-2-4-8