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Description
Realization of the artificial pulsed nucleosynthesis (in the interval ~10E-6 s) requires intensive neutron fluxes, achievable by non-stationary chain reaction of fission and synthesis. To make an experimental nucleosynthesis the provided irradiated target is installed with account of the geometry and for achieving of the maximal neutron exposure. The rapid nucleosynthesis (in cosmology – r(rapid)-process) is carried out as multiple (n,gamma)-captures on target nuclei, creating poorly studied and unexplored isotopes with a large neutron excess: up to 19 neutron captures in the target with U238 started isotopes [1].
Baseing on the developed dynamical model [2,3] the pulse nucleosynthesis experiments (Mike, Anacostia, Barbel, Par, Vulcan, Kankakee and Cyclamen) were simulated. The obtained isotope yields are in good or satisfactory agreement with experiments.
Analytical analysis of isotope yield relations (for mass A=245 and 244, A=246 and 245, A=247 and 246) made for the static model indicated on the linear dependence of isotope relations to the achieved neutron fluence (~ 10E+24 n/cm2) [4]. The results for the dynamical model also confirmed the conclusions for the U238 target. Taking into account the specifics of the process, it is assumed that injection of Pu239-isotope to the target occurs during the creation of a plasma ball and it means the generating of the additional starting isotope, which yields also calculated. It was obtained that isotope relations from the main starting isotope (U238) as from the Pu239-mixture also follow the low close to linear one. The isotope relations of the total yields also roughly linear proportional to the neutron fluence that allow to apply this fluence
References
[1] Ingley J.S. Nuclear Physics A (1969); 124; 130.
[2] Lutostansky YuS, Lyashuk VI, Panov IV. Bull Russ Acad Sci: Phys (2010);75:533.
[3] Lyashuk VI. Bull Russ Acad Sci: Phys (2012);76:1182.
[4] Lyashuk V.I., Results in Physics 2024; 56:107234.
ctional for evaluation of the achieved fluence.
| Тематическая секция | Фундаментальная ядерная физика |
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