We investigated ^(50,52-54)Cr-induced fusion reactions for the synthesis of the superheavy element in the 104≤Z≤122 range.The cross sections produced in this investigation using ^(54)Cr projectiles were compared wit...We investigated ^(50,52-54)Cr-induced fusion reactions for the synthesis of the superheavy element in the 104≤Z≤122 range.The cross sections produced in this investigation using ^(54)Cr projectiles were compared with those obtained in prior experiments.The estimated cross sections from this analysis are consistent with the findings of prior studies.From the current study,the predicted cross section was found to be 42fb at 236 MeV for ^(53)Cr+^(243)Am,23.2 fb at 236 MeV for ^(54)Cr+^(247)Cm,95.6 fb at 240 MeV for ^(53)Cr+248Bk,and 1.33 fb at 242 MeV for ^(53)Cr+250Cf.Consequently,these projected cross sections with excitation energy and beam energy will be useful in future Cr-induced fusion reaction investigations.展开更多
We study the experimental and theoretical fusion reactions of compound nuclei synthesized using different projectile-target systems,among which at least one projectile/target nucleus is spherical.The first part of thi...We study the experimental and theoretical fusion reactions of compound nuclei synthesized using different projectile-target systems,among which at least one projectile/target nucleus is spherical.The first part of this study analyses the fusion cross sections obtained using different projectile-target combinations in the synthesis of polonium(Po),thorium(Th),and nobelium(No).In the second part of this study,we suggest the fusion reaction to synthesize the superheavy element Z=122.We select three nuclei,polonium(Po),thorium(Th),and nobelium(No),which are synthesized using various projectile-target combinations.We also investigate fusion reactions such as^(90)Zr(^(208)Pb,2n)^(296)122.This study may be a milestone in the synthesis of the superheavy element Z=122.展开更多
A detailed investigation of different decay modes,namely alpha decay,beta decay,cluster decay including heavy particle emission(Z_(c)>28),and spontaneous fission,was carried out,leading to the identification of new...A detailed investigation of different decay modes,namely alpha decay,beta decay,cluster decay including heavy particle emission(Z_(c)>28),and spontaneous fission,was carried out,leading to the identification of new cluster and beta-plus emitters in superheavy nucle with 104≤Z≤126.For the first time,we identified around20 beta-plus emitters in superheavy nuclei.Heavy-particle radioactivity was observed in superheavy elements of atomic number in the range 116≤Z≤126.^(292-293)Og were identified as ^(86)Kr emitters,and ^(298)122 and ^(300)122 were identified as ^(94)Zr emitters,whereas heavy-particle radioactivity from ^(91)Y was also observed in ^(299)123.Furthermore,the nuclei ^(300)124 and ^(306)126 exhibit ^(96)Mo radioactivity.The reported regions of beta-plus and heavyparticle radioactivity for superheavy nuclei are stronger than those for alpha decay.The identified decay modes for superheavy nuclei are presented in a chart.This study is intended to serve as a reference for identifying possible decay modes in the superheavy region.展开更多
The alpha ternary fission half-lives of thorium isotopes have been studied using the Coulomb and proximity potential models.The role of the deformation effects and the angle of orientation were included during the eva...The alpha ternary fission half-lives of thorium isotopes have been studied using the Coulomb and proximity potential models.The role of the deformation effects and the angle of orientation were included during the evaluation of the total potential.Fragment combinations were identified using cold valley plots of the driving potential.The half-lives and yields were evaluated using the penetration probability.The dependence of the logarithmic half-lives on different angles of orientation was studied.The evaluated alpha ternary fission yield was compared with that of the available experiments with and without deformations.The half-lives obtained in the present work were compared with those of the available data.Possible alpha ternary fission fragments were identified in the isotopes of thorium.The alpha ternary fission half-lives were compared to the binary fission half-lives.The binary fission half-lives are dominant in the ^(209-225)Th nuclei,and the ternary fission half-lives are dominant in the isotopes of the ^(226-238)Th nuclei.展开更多
We have proposed a pocket formula for mass attenuation coefficient(μ/ρ), mass energy absorption coefficient(μ_(en)/ρ), and effective atomic number(Z_(eff)) in different tissues of human organs. We have also assign...We have proposed a pocket formula for mass attenuation coefficient(μ/ρ), mass energy absorption coefficient(μ_(en)/ρ), and effective atomic number(Z_(eff)) in different tissues of human organs. We have also assigned a new chemical formula for all studied tissues based on their composition. We have introduced a new parameter called effective composition index(C_(eff)). Based on this, we have introduced a new method to compute the effective atomic number. The evaluated photon interaction parameters are graphically represented. The evaluated average, maximum,minimum, and standard deviations of effective atomic number are tabulated. The proposed formula produces a mass attenuation coefficient, mass energy absorption coefficient, and effective atomic number from their展开更多
Objective:This study is aimed to measure the Bremsstrahlung spectrum produced by ^(204)Tl in barium compounds such as BaCl_(2),BaCO_(3),Ba(NO_(3))_(2),BaSO_(4) and BaTiO_(3).It is also aimed to study the attenuation o...Objective:This study is aimed to measure the Bremsstrahlung spectrum produced by ^(204)Tl in barium compounds such as BaCl_(2),BaCO_(3),Ba(NO_(3))_(2),BaSO_(4) and BaTiO_(3).It is also aimed to study the attenuation of bremsstrahlung in the given compounds.Materials and methods:Bremsstrahlung spectrum and yield ^(204)Tl in barium compounds such as BaCl_(2),BaCO_(3),Ba(NO_(3))_(2),BaSO_(4) and BaTiO_(3) have been measured using NaI(Tl)detector and multichannel analyzer(MCA).The beta stopper technique is employed to measure the bremsstrahlung spectrum.Liden-Starfelt procedure is used to unfold the measured raw spectrum.The unfolded spectra were compared with Tseng–Pratt theory.Results:The measured spectra agree with the theory at low energy end of spectrum and some deviation(less than 10%)at higher energy end of spectrum.Attenuation of the bremsstrahlung,excited by ^(204)Tl beta emitters in the same compounds,is also studied.The measured attenuation parameter is not constant with absorber thickness and it increases with increasing Zmod of the absorber.Conclusion:The discrepancy between measured spectrum and theory increases with Zmod of the target compound and photon energy.The attenuation of bremsstrahlung may be represented as a combination of a large number of exponential terms rather than single term.展开更多
文摘We investigated ^(50,52-54)Cr-induced fusion reactions for the synthesis of the superheavy element in the 104≤Z≤122 range.The cross sections produced in this investigation using ^(54)Cr projectiles were compared with those obtained in prior experiments.The estimated cross sections from this analysis are consistent with the findings of prior studies.From the current study,the predicted cross section was found to be 42fb at 236 MeV for ^(53)Cr+^(243)Am,23.2 fb at 236 MeV for ^(54)Cr+^(247)Cm,95.6 fb at 240 MeV for ^(53)Cr+248Bk,and 1.33 fb at 242 MeV for ^(53)Cr+250Cf.Consequently,these projected cross sections with excitation energy and beam energy will be useful in future Cr-induced fusion reaction investigations.
文摘We study the experimental and theoretical fusion reactions of compound nuclei synthesized using different projectile-target systems,among which at least one projectile/target nucleus is spherical.The first part of this study analyses the fusion cross sections obtained using different projectile-target combinations in the synthesis of polonium(Po),thorium(Th),and nobelium(No).In the second part of this study,we suggest the fusion reaction to synthesize the superheavy element Z=122.We select three nuclei,polonium(Po),thorium(Th),and nobelium(No),which are synthesized using various projectile-target combinations.We also investigate fusion reactions such as^(90)Zr(^(208)Pb,2n)^(296)122.This study may be a milestone in the synthesis of the superheavy element Z=122.
文摘A detailed investigation of different decay modes,namely alpha decay,beta decay,cluster decay including heavy particle emission(Z_(c)>28),and spontaneous fission,was carried out,leading to the identification of new cluster and beta-plus emitters in superheavy nucle with 104≤Z≤126.For the first time,we identified around20 beta-plus emitters in superheavy nuclei.Heavy-particle radioactivity was observed in superheavy elements of atomic number in the range 116≤Z≤126.^(292-293)Og were identified as ^(86)Kr emitters,and ^(298)122 and ^(300)122 were identified as ^(94)Zr emitters,whereas heavy-particle radioactivity from ^(91)Y was also observed in ^(299)123.Furthermore,the nuclei ^(300)124 and ^(306)126 exhibit ^(96)Mo radioactivity.The reported regions of beta-plus and heavyparticle radioactivity for superheavy nuclei are stronger than those for alpha decay.The identified decay modes for superheavy nuclei are presented in a chart.This study is intended to serve as a reference for identifying possible decay modes in the superheavy region.
文摘The alpha ternary fission half-lives of thorium isotopes have been studied using the Coulomb and proximity potential models.The role of the deformation effects and the angle of orientation were included during the evaluation of the total potential.Fragment combinations were identified using cold valley plots of the driving potential.The half-lives and yields were evaluated using the penetration probability.The dependence of the logarithmic half-lives on different angles of orientation was studied.The evaluated alpha ternary fission yield was compared with that of the available experiments with and without deformations.The half-lives obtained in the present work were compared with those of the available data.Possible alpha ternary fission fragments were identified in the isotopes of thorium.The alpha ternary fission half-lives were compared to the binary fission half-lives.The binary fission half-lives are dominant in the ^(209-225)Th nuclei,and the ternary fission half-lives are dominant in the isotopes of the ^(226-238)Th nuclei.
文摘We have proposed a pocket formula for mass attenuation coefficient(μ/ρ), mass energy absorption coefficient(μ_(en)/ρ), and effective atomic number(Z_(eff)) in different tissues of human organs. We have also assigned a new chemical formula for all studied tissues based on their composition. We have introduced a new parameter called effective composition index(C_(eff)). Based on this, we have introduced a new method to compute the effective atomic number. The evaluated photon interaction parameters are graphically represented. The evaluated average, maximum,minimum, and standard deviations of effective atomic number are tabulated. The proposed formula produces a mass attenuation coefficient, mass energy absorption coefficient, and effective atomic number from their
文摘Objective:This study is aimed to measure the Bremsstrahlung spectrum produced by ^(204)Tl in barium compounds such as BaCl_(2),BaCO_(3),Ba(NO_(3))_(2),BaSO_(4) and BaTiO_(3).It is also aimed to study the attenuation of bremsstrahlung in the given compounds.Materials and methods:Bremsstrahlung spectrum and yield ^(204)Tl in barium compounds such as BaCl_(2),BaCO_(3),Ba(NO_(3))_(2),BaSO_(4) and BaTiO_(3) have been measured using NaI(Tl)detector and multichannel analyzer(MCA).The beta stopper technique is employed to measure the bremsstrahlung spectrum.Liden-Starfelt procedure is used to unfold the measured raw spectrum.The unfolded spectra were compared with Tseng–Pratt theory.Results:The measured spectra agree with the theory at low energy end of spectrum and some deviation(less than 10%)at higher energy end of spectrum.Attenuation of the bremsstrahlung,excited by ^(204)Tl beta emitters in the same compounds,is also studied.The measured attenuation parameter is not constant with absorber thickness and it increases with increasing Zmod of the absorber.Conclusion:The discrepancy between measured spectrum and theory increases with Zmod of the target compound and photon energy.The attenuation of bremsstrahlung may be represented as a combination of a large number of exponential terms rather than single term.
