FISSION OF ACTONIDES BY ALPHA PARTICLES WITH ENERGY OF 29 MeV
https://doi.org/10.52676/1729-7885-2019-3-117-122
Abstract
The experimental data on mass and energy distributions of fission fragments of compound nuclei 236U, 237, 240, 242Pu, 244Cm formed in 232Th (α, f), 233, 236, 238U (α, f) и 240Pu (α, f) reactions at incident alpha particle energies of Eα = 29 MeV is presented. Excitation energy of the compound nuclei for all reactions was 21±2 MeV. Experiments were carried on the isochronous cyclotrone U-150M at The Institute of Nuclear Physics, Almaty city.тIt was shown that behavior of mass distributions Y(m) depends mainly on proton number in heavy and light fragmentsтthat are being formed. For isotopes of one element (237, 240, 242 Pu) charge distributions ofтfragments Y(Z) are almost the same. The discovered differences between behaviors of fragments mass distributions Y(m) and their energy distributions (Ek(m) и σ2(m)) points to these characteristics being formed at a different stages of fission process. Kinetic energy is determined by the conditions at rupture point, mass distributions are formed at earlier stages of fission process, when future fragments are still connected by a thick neck.
About the Authors
A. N. Pan
Institute of Nuclear Physics; Al-Farabi Kazakh National University
Kazakhstan
Almaty
Kazakhstan
Almaty
E. M. Kozulin
Flerov Laboratory of Nuclear Reactions, JINR
Russian Federation
Dubna
Russian Federation
Dubna
T. N. Kvochkina
Institute of Nuclear Physics
Kazakhstan
Almaty
Kazakhstan
Almaty
N. T. Burtebayev
Institute of Nuclear Physics; Al-Farabi Kazakh National University
Kazakhstan
Almaty
Kazakhstan
Almaty
K. V. Кovalchuk
Institute of Nuclear Physics
Kazakhstan
Almaty
Kazakhstan
Almaty
S. Kh. Zholdybayeva
Institute of Nuclear Physics
Kazakhstan
Almaty
Kazakhstan
Almaty
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Review
For citations:
Pan A.N., Kozulin E.M., Kvochkina T.N., Burtebayev N.T., Кovalchuk K.V., Zholdybayeva S.Kh. FISSION OF ACTONIDES BY ALPHA PARTICLES WITH ENERGY OF 29 MeV. NNC RK Bulletin. 2019;(3):117-122. (In Russ.) https://doi.org/10.52676/1729-7885-2019-3-117-122
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