The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform
Victor V. Flambaum - One of the best experts on this subject based on the ideXlab platform.
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Calculation of atomic spectra and transition amplitudes for the Superheavy Element Db (Z =105)
Physical Review A, 2018Co-Authors: B. G. C. Lackenby, V. A. Dzuba, Victor V. FlambaumAbstract:Atomic spectra and other properties of Superheavy Element dubnium (Db, Z=105) are calculated using recently developed method combining configuration interaction with perturbation theory (the CIPT method, Dzuba et al, Phys. Rev. A, {\bf 95}, 012503 (2017)). These include energy levels for low-lying states of Db and Db~II, electric dipole transition amplitudes from the ground state of Db, isotope shift for these transitions and ionisation potential of Db. Similar calculations for Ta, which is lighter analog of Db, are performed to control the accuracy of the calculations.
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calculation of atomic spectra and transition amplitudes for the Superheavy Element db z 105
Physical Review A, 2018Co-Authors: B. G. C. Lackenby, V. A. Dzuba, Victor V. FlambaumAbstract:Atomic spectra and other properties of Superheavy Element dubnium (Db, Z=105) are calculated using recently developed method combining configuration interaction with perturbation theory (the CIPT method, Dzuba et al, Phys. Rev. A, {\bf 95}, 012503 (2017)). These include energy levels for low-lying states of Db and Db~II, electric dipole transition amplitudes from the ground state of Db, isotope shift for these transitions and ionisation potential of Db. Similar calculations for Ta, which is lighter analog of Db, are performed to control the accuracy of the calculations.
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Calculation of the spectrum of the Superheavy Element Z = 120
Physical Review A, 2008Co-Authors: T. H. Dinh, V. A. Dzuba, Victor V. Flambaum, J. S. M. GingesAbstract:High-precision calculations of the energy levels of the Superheavy Element $Z=120$ are presented. The relativistic Hartree-Fock and configuration-interaction techniques are employed. The correlations between core and valence electrons are treated by means of the correlation potential method and many-body perturbation theory. Similar calculations for barium and radium are used to gauge the accuracy of the calculations and to improve the ab initio results.
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calculation of the spectrum of the Superheavy Element z 120
Physical Review A, 2008Co-Authors: T. H. Dinh, V. A. Dzuba, Victor V. Flambaum, J. S. M. GingesAbstract:High-precision calculations of the energy levels of the Superheavy Element $Z=120$ are presented. The relativistic Hartree-Fock and configuration-interaction techniques are employed. The correlations between core and valence electrons are treated by means of the correlation potential method and many-body perturbation theory. Similar calculations for barium and radium are used to gauge the accuracy of the calculations and to improve the ab initio results.
K. N. Sridhar - One of the best experts on this subject based on the ideXlab platform.
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quasifission and fusion fission lifetime studies for the Superheavy Element z 120
Physical Review C, 2021Co-Authors: H. C. Manjunatha, K. N. Sridhar, L Seenappa, P Damodara S Gupta, N Manjunatha, N Sowmya, T NandiAbstract:We study the quasifission and fusion-fission lifetimes for a number of fusion reactions used to synthesize the Superheavy Element $Z=120$ using a statistical method within the framework of the dinuclear system model. In particular, influence of the target orientation and angular momentum on such lifetimes have been investigated. The quasifission and fusion-fission lifetimes have been compared very well with that of available experiments on successful Superheavy Element synthesis. We notice further the predicted quasifission and fusion-fission lifetimes of the projectile-target combinations used for the synthesis of the Superheavy Element $Z=120$ also show the similar trend. Furthermore, the fusion-fission lifetime is seen to somewhat decrease with the increase of the angular momentum as well as beam energy. Little effect is seen on fusion barrier of the reaction and fission barrier of Superheavy compound nucleus. Variation of quasifission lifetime is also not much with orientation angle, beam energy and fission barrier of the Superheavy compound nuclei. Hence, this lifetime study does not provide any good reason why the attempted reactions have failed to synthesize the Superheavy nuclei $Z=120$. Furthermore, consideration of the fusion barrier, fissility, mass asymmetry, deformation parameter, fission barrier, etc., leads us to reveal that optimal colliding energy is important to have the largest evaporation residue cross section for any chosen reaction so that it is well within the measurable limit for a specific experimental set up.
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studies on the synthesis of Superheavy Element z 123
Indian Journal of Physics, 2020Co-Authors: H. C. Manjunatha, K. N. Sridhar, H. B. RamalingamAbstract:We have studied the α-decay chains of Superheavy nuclei Z = 123 in the range 265 ≤ A ≤ 316. The nuclei 303–308123 were found to have longer half-lives and hence could be detected them if synthesized in a laboratory. After identifying the possible isotopes, we have identified the most probable projectile–target combinations by studying the fusion cross section, evaporation residue cross section, compound nucleus formation probability (PCN) and survival probability (PSurv) of different projectile–target combinations to synthesize Superheavy Element Z = 123. The selected most probable projectile–target combination to synthesize Superheavy nuclei with Z = 123 is Mn + Cf. We hope that our predictions may be guide for the future experiments in the synthesis of new Superheavy Element Z = 123.
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A Detail Investigation on the Synthesis of Superheavy Element Z = 119
Physics of Particles and Nuclei Letters, 2019Co-Authors: H. C. Manjunatha, K. N. SridharAbstract:We have studied the α-decay properties of Superheavy nuclei Z = 119 in the range 265 ≤ A ≤ 316. By studying the α-decay properties, we have identified the possible isotopes for Superheavy Element Z = 119. The nuclei 292–299119 were found to have long half-lives and hence could be sufficient to detect them if synthesized in a laboratory. We hope that our predictions may be guide for the future experiments in the synthesis of more isotopes of super heavy nuclei Z = 119.
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a detail investigation on the synthesis of Superheavy Element z 119
Physics of Particles and Nuclei Letters, 2019Co-Authors: H. C. Manjunatha, K. N. SridharAbstract:We have studied the α-decay properties of Superheavy nuclei Z = 119 in the range 265 ≤ A ≤ 316. By studying the α-decay properties, we have identified the possible isotopes for Superheavy Element Z = 119. The nuclei 292–299119 were found to have long half-lives and hence could be sufficient to detect them if synthesized in a laboratory. We hope that our predictions may be guide for the future experiments in the synthesis of more isotopes of super heavy nuclei Z = 119.
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Studies on the synthesis of Superheavy Element Z = 123
Indian Journal of Physics, 2019Co-Authors: K. N. Sridhar, H. C. Manjunatha, H. B. RamalingamAbstract:We have studied the α-decay chains of Superheavy nuclei Z = 123 in the range 265 ≤ A ≤ 316. The nuclei 303–308123 were found to have longer half-lives and hence could be detected them if synthesized in a laboratory. After identifying the possible isotopes, we have identified the most probable projectile–target combinations by studying the fusion cross section, evaporation residue cross section, compound nucleus formation probability (PCN) and survival probability (PSurv) of different projectile–target combinations to synthesize Superheavy Element Z = 123. The selected most probable projectile–target combination to synthesize Superheavy nuclei with Z = 123 is Mn + Cf. We hope that our predictions may be guide for the future experiments in the synthesis of new Superheavy Element Z = 123.
Krishnan Balasubramanian - One of the best experts on this subject based on the ideXlab platform.
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Breakdown of the singlet and triplet nature of electronic states of the Superheavy Element 114 dihydride (114H2)
The Journal of Chemical Physics, 2002Co-Authors: Krishnan BalasubramanianAbstract:It is demonstrated that the Superheavy Element (114) forms a dihydride with electronic features that exhibit breakdown of the conventional singlet (X1A1) and triplet (3B1) states due to large relativistic effects including spin–orbit effects. The 1A1 state is shown to undergo avoided crossing with the 3B1(A1) state and other states in the C2v2 double group. We have carried out relativistic complete active-space multiconfiguration interaction followed by multireference configuration interaction computations including spin–orbit effects that included several million configurations including 6d electron correlations for the electronic states of the Superheavy Element (114)H2. The potential energy curves of both ground and excited states are computed including electron correlation and spin–orbit effects simultaneously. The curves exhibit unusual features from their traditional nonrelativistic counterparts: namely, 1A1, 3B1, and 1B1 states due to spin–orbit coupling. The spin–orbit effects are shown to destabi...
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Electronic states of the Superheavy Element 113 and (113)H
Chemical Physics Letters, 2002Co-Authors: Krishnan BalasubramanianAbstract:Abstract We have carried out relativistic complete active space multi-configuration interaction followed by multi-reference configuration interaction computations including spin–orbit effects for the electronic states of the Superheavy Element 113 and (113)H. It is demonstrated that (113)H exhibits unusually short bond length and large dissociation energy due to large relativistic effects including spin–orbit effects. The 6d-spin–orbit-correlation effects are shown to be very important for (113)H.
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Relativistic computations of the electronic states of the Superheavy Element 114 and 114
Chemical Physics Letters, 2001Co-Authors: Krishnan BalasubramanianAbstract:Abstract Relativistic complete active space multi-configuration interaction followed by multi-reference configuration interaction computations are carried out for the electronic states of the newly discovered Superheavy Element 114 and 114 + . Many unusual periodic trends in the energy separations of the electronic states of the Element 114 and 114 + and unusual features in electronic state compositions are found due to relativistic effects.
V. A. Dzuba - One of the best experts on this subject based on the ideXlab platform.
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Calculation of atomic spectra and transition amplitudes for the Superheavy Element Db (Z =105)
Physical Review A, 2018Co-Authors: B. G. C. Lackenby, V. A. Dzuba, Victor V. FlambaumAbstract:Atomic spectra and other properties of Superheavy Element dubnium (Db, Z=105) are calculated using recently developed method combining configuration interaction with perturbation theory (the CIPT method, Dzuba et al, Phys. Rev. A, {\bf 95}, 012503 (2017)). These include energy levels for low-lying states of Db and Db~II, electric dipole transition amplitudes from the ground state of Db, isotope shift for these transitions and ionisation potential of Db. Similar calculations for Ta, which is lighter analog of Db, are performed to control the accuracy of the calculations.
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calculation of atomic spectra and transition amplitudes for the Superheavy Element db z 105
Physical Review A, 2018Co-Authors: B. G. C. Lackenby, V. A. Dzuba, Victor V. FlambaumAbstract:Atomic spectra and other properties of Superheavy Element dubnium (Db, Z=105) are calculated using recently developed method combining configuration interaction with perturbation theory (the CIPT method, Dzuba et al, Phys. Rev. A, {\bf 95}, 012503 (2017)). These include energy levels for low-lying states of Db and Db~II, electric dipole transition amplitudes from the ground state of Db, isotope shift for these transitions and ionisation potential of Db. Similar calculations for Ta, which is lighter analog of Db, are performed to control the accuracy of the calculations.
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Calculation of the spectrum of the Superheavy Element Z = 120
Physical Review A, 2008Co-Authors: T. H. Dinh, V. A. Dzuba, Victor V. Flambaum, J. S. M. GingesAbstract:High-precision calculations of the energy levels of the Superheavy Element $Z=120$ are presented. The relativistic Hartree-Fock and configuration-interaction techniques are employed. The correlations between core and valence electrons are treated by means of the correlation potential method and many-body perturbation theory. Similar calculations for barium and radium are used to gauge the accuracy of the calculations and to improve the ab initio results.
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calculation of the spectrum of the Superheavy Element z 120
Physical Review A, 2008Co-Authors: T. H. Dinh, V. A. Dzuba, Victor V. Flambaum, J. S. M. GingesAbstract:High-precision calculations of the energy levels of the Superheavy Element $Z=120$ are presented. The relativistic Hartree-Fock and configuration-interaction techniques are employed. The correlations between core and valence electrons are treated by means of the correlation potential method and many-body perturbation theory. Similar calculations for barium and radium are used to gauge the accuracy of the calculations and to improve the ab initio results.
H. B. Ramalingam - One of the best experts on this subject based on the ideXlab platform.
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studies on the synthesis of Superheavy Element z 123
Indian Journal of Physics, 2020Co-Authors: H. C. Manjunatha, K. N. Sridhar, H. B. RamalingamAbstract:We have studied the α-decay chains of Superheavy nuclei Z = 123 in the range 265 ≤ A ≤ 316. The nuclei 303–308123 were found to have longer half-lives and hence could be detected them if synthesized in a laboratory. After identifying the possible isotopes, we have identified the most probable projectile–target combinations by studying the fusion cross section, evaporation residue cross section, compound nucleus formation probability (PCN) and survival probability (PSurv) of different projectile–target combinations to synthesize Superheavy Element Z = 123. The selected most probable projectile–target combination to synthesize Superheavy nuclei with Z = 123 is Mn + Cf. We hope that our predictions may be guide for the future experiments in the synthesis of new Superheavy Element Z = 123.
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Studies on the synthesis of Superheavy Element Z = 123
Indian Journal of Physics, 2019Co-Authors: K. N. Sridhar, H. C. Manjunatha, H. B. RamalingamAbstract:We have studied the α-decay chains of Superheavy nuclei Z = 123 in the range 265 ≤ A ≤ 316. The nuclei 303–308123 were found to have longer half-lives and hence could be detected them if synthesized in a laboratory. After identifying the possible isotopes, we have identified the most probable projectile–target combinations by studying the fusion cross section, evaporation residue cross section, compound nucleus formation probability (PCN) and survival probability (PSurv) of different projectile–target combinations to synthesize Superheavy Element Z = 123. The selected most probable projectile–target combination to synthesize Superheavy nuclei with Z = 123 is Mn + Cf. We hope that our predictions may be guide for the future experiments in the synthesis of new Superheavy Element Z = 123.
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studies on the synthesis Superheavy Element z 120
Nuclear Physics, 2019Co-Authors: H. C. Manjunatha, K. N. Sridhar, H. B. RamalingamAbstract:Abstract We have identified the probable isotopes for Superheavy Element Z = 120 by comparing the alpha decay half-lives with that of spontaneous fission. The nuclei 290 – 304 120 were found to have long half-lives and hence could be sufficient to detect them if synthesized in a laboratory. We have also studied the most possible projectile–target combination to synthesis those nuclei. The selected projectile–target system that can yield maximum production cross section is Ti+Cf.
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A Study on the Synthesis of Superheavy Element Z = 125
Brazilian Journal of Physics, 2019Co-Authors: K. N. Sridhar, H. C. Manjunatha, H. B. RamalingamAbstract:We have studied the α-decay chains of Superheavy nuclei Z = 125 in the range 265 ≤ A ≤ 336. The nuclei 303–315125 were found to have long half-lives and hence could be sufficient to detect them if synthesized in a laboratory. After identifying the possible isotopes, we have identified the most probable projectile-target combinations by studying the fusion cross section, evaporation residue cross section, compound nucleus formation probability (PCN), and survival probability (PSurv). The selected most probable projectile-target combinations to synthesize Superheavy nuclei 303–315125 are Co+Cf, Ni+Bk, and Cu+Cm. We hope that our predictions may be guide for the future experiments in the synthesis of the new Superheavy Element Z = 125.
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a study on the synthesis of Superheavy Element z 125
Brazilian Journal of Physics, 2019Co-Authors: K. N. Sridhar, H. C. Manjunatha, H. B. RamalingamAbstract:We have studied the α-decay chains of Superheavy nuclei Z = 125 in the range 265 ≤ A ≤ 336. The nuclei 303–315125 were found to have long half-lives and hence could be sufficient to detect them if synthesized in a laboratory. After identifying the possible isotopes, we have identified the most probable projectile-target combinations by studying the fusion cross section, evaporation residue cross section, compound nucleus formation probability (PCN), and survival probability (PSurv). The selected most probable projectile-target combinations to synthesize Superheavy nuclei 303–315125 are Co+Cf, Ni+Bk, and Cu+Cm. We hope that our predictions may be guide for the future experiments in the synthesis of the new Superheavy Element Z = 125.