Photofission fragments mass yield for^(232)Th,^(234;238) U,^(237) Np, and^(239;240;242) Pu isotopes are investigated.The calculations are done using a developed approach based on Gorodisskiy's phenomenological for...Photofission fragments mass yield for^(232)Th,^(234;238) U,^(237) Np, and^(239;240;242) Pu isotopes are investigated.The calculations are done using a developed approach based on Gorodisskiy's phenomenological formalism. The Gorodisskiy's method is developed to be applied for the neutron-induced fission. Here we revised it for application to photofission. The effect of emitted neutron prior to fission on the fission fragment mass yields has also been studied. The peak-to-valley ratio is extracted for the240 Pu isotope as a function of energy. Obtained results of the present formalism are compared with the available experimental data. Satisfactory agreement is achieved between the results of present approach and the experimental data.展开更多
This paper presents a comprehensive investigation of the true ternary fission of the^(248)Cf isotope.Using the Three-Cluster Model(TCM)based on the WKB approximation,detailed calculations were performed for all possib...This paper presents a comprehensive investigation of the true ternary fission of the^(248)Cf isotope.Using the Three-Cluster Model(TCM)based on the WKB approximation,detailed calculations were performed for all possible fragment configurations,considering the equatorial and collinear geometries.The fragment charge numbers(Z)were systematically filtered within the range of Z=20 to Z=52,and all combinations were examined for three positional arrangements:fragments A1,A2,and A3 occupying the middle position in collinear geometry.For each combination,key quantities were calculated,including driving potential(V-Q),penetration probability(P),relative yield(Y),decay constant(λ),and half-life(T1/2).The selection of optimal fragment combinations was based on higher penetration probability or minimum driving potential,ensuring a systematic approach to identifying the most favorable fission configurations.Redundancy from permutations of Z_(1),Z_(2),and Z_(3)was eliminated by treating them equivalently.The results highlight the significant influence of fragment geometry and nuclear structure,particularly shell effects,on the fission dynamics.This work provides new insights into the complex mechanisms of true ternary fission,contributing to the broader understanding of nuclear stability and fragment distributions in such processes.The novelty of this study relative to similar research is the investigation of the effects of fragments permutations,geometries,and neutron emission on the fission process.展开更多
True ternary fission and Tin-accompanied ternary fission of 242Pu are studied by using the'Three Cluster Model'.True ternary fission is considered as a formation of heavy fragments in the region 28≤Z1,Z2,Z3≤...True ternary fission and Tin-accompanied ternary fission of 242Pu are studied by using the'Three Cluster Model'.True ternary fission is considered as a formation of heavy fragments in the region 28≤Z1,Z2,Z3≤38 with comparable masses.The possible fission channels are predicted by the potential-energy calculations.Interaction potentials,Q-values and relative yields for all possible fragmentations in equatorial and collinear configurations are calculated and compared.It is found that ternary fission with formation of a double magic nucleus like 132Sn is more probable than the other fragmentations.Also,the kinetic energies of the fragments for the group Z1=32,Z2=32 and Z3=30 are calculated for all combinations in the collinear geometry as a sequential decay.展开更多
文摘Photofission fragments mass yield for^(232)Th,^(234;238) U,^(237) Np, and^(239;240;242) Pu isotopes are investigated.The calculations are done using a developed approach based on Gorodisskiy's phenomenological formalism. The Gorodisskiy's method is developed to be applied for the neutron-induced fission. Here we revised it for application to photofission. The effect of emitted neutron prior to fission on the fission fragment mass yields has also been studied. The peak-to-valley ratio is extracted for the240 Pu isotope as a function of energy. Obtained results of the present formalism are compared with the available experimental data. Satisfactory agreement is achieved between the results of present approach and the experimental data.
文摘This paper presents a comprehensive investigation of the true ternary fission of the^(248)Cf isotope.Using the Three-Cluster Model(TCM)based on the WKB approximation,detailed calculations were performed for all possible fragment configurations,considering the equatorial and collinear geometries.The fragment charge numbers(Z)were systematically filtered within the range of Z=20 to Z=52,and all combinations were examined for three positional arrangements:fragments A1,A2,and A3 occupying the middle position in collinear geometry.For each combination,key quantities were calculated,including driving potential(V-Q),penetration probability(P),relative yield(Y),decay constant(λ),and half-life(T1/2).The selection of optimal fragment combinations was based on higher penetration probability or minimum driving potential,ensuring a systematic approach to identifying the most favorable fission configurations.Redundancy from permutations of Z_(1),Z_(2),and Z_(3)was eliminated by treating them equivalently.The results highlight the significant influence of fragment geometry and nuclear structure,particularly shell effects,on the fission dynamics.This work provides new insights into the complex mechanisms of true ternary fission,contributing to the broader understanding of nuclear stability and fragment distributions in such processes.The novelty of this study relative to similar research is the investigation of the effects of fragments permutations,geometries,and neutron emission on the fission process.
文摘True ternary fission and Tin-accompanied ternary fission of 242Pu are studied by using the'Three Cluster Model'.True ternary fission is considered as a formation of heavy fragments in the region 28≤Z1,Z2,Z3≤38 with comparable masses.The possible fission channels are predicted by the potential-energy calculations.Interaction potentials,Q-values and relative yields for all possible fragmentations in equatorial and collinear configurations are calculated and compared.It is found that ternary fission with formation of a double magic nucleus like 132Sn is more probable than the other fragmentations.Also,the kinetic energies of the fragments for the group Z1=32,Z2=32 and Z3=30 are calculated for all combinations in the collinear geometry as a sequential decay.
