Production of neutron-rich N = 126 nuclei in multinucleon transfer reactions: Comparison between 136Xe + 198Pt and 238U + 198Pt reactions

Zhao, Kai; Liu, Zheng-Wei; Zhang, F.S.; Wang, N.

doi:10.1016/j.physletb.2021.136101

Cited by 21 publications

(13 citation statements)

References 21 publications

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“…A. Cross sections of undiscovered neutrondeficient Np, Pu, Am, and Cm in proton-induced spallation at 1 GeV/nucleon In our previous work [28], it has been demonstrated that the IQMD-GEMINI++ model can reproduce the cross sections (3282 data points) of productions in the reactions 238 U + 9 Be, d, and p at 1 GeV/nucleon within 1.5 orders of magnitude. A comparison between the data and the calculations has been made in detail; see Ref.…”

Section: Resultsmentioning

confidence: 99%

“…In the extremely neutron-deficient region (around Z = 90 and N = 140), the IQMD-GEMINI++ model overestimates the cross sections by approximately 1 to 2 orders of magnitude. The isotopic cross sections in the 238 U + d and 9 Be reactions at 1 GeV/nucleon were also calculated and compared with the available data. For these two reactions, the general logarithmic difference distributions caused by the direct reaction and shell effect are similar to that for the 238 U + p reaction.…”

Section: Resultsmentioning

confidence: 99%

“…1, we make a comparison focusing on the cross sections of neutron-deficient nuclei around N = 126, for which only the data for the 238 U + 9 Be reactions are available. The (blue) squares and triangles show the calculations of the IQMD-GEMNI++ model for 238 U + p and 238 U + 9 Be, respectively. The available experimental data for the 238 U + 9 Be reactions at 1 GeV/nucleon are also shown in Refs.…”

Section: Resultsmentioning

confidence: 99%

“…Calculations based on the Langevin type dynamical equations of motion suggest the 136 Xe + 208 Pb reactions at energies around the Coulomb barrier, in which more than 50 unknown nuclei might be produced with cross sections not less than 1 μb [6]. Then, the isotopic, mass, and energy distributions of the fragments in those reactions were measured at Dubna and Argonne [7,8], providing data to test models for multinucleon transfer, such as GRAZING, the Langevin model, the improved quantum molecular dynamics model [9,10], and the dinuclear system model [11].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Production of neutron-deficient nuclei around N = 126 by proton-induced spallation*

Lei¹,

Xiao²,

Feng³

et al. 2023

Chinese Phys. C

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Many isotopes of Np, Pu, Am and Cm around N = 126 shell still have not been produced in the laboratory. This work with the aims to investigate the cross sections and yields of the neutron-deficient nuclei Np, Pu, Am and Cm produced in the proton-induced spallations of transuranium element. The isospin-dependent quantum molecular dynamics (IQMD) model is applied to study the dynamical process of reaction, and the subsequent decay process is simulated by the GEMINI++ model. The IQMD-GEMINI++ model is applied to calculate the cross section, kinetic energy and angle distribution of the isotopic productions around N=126. The Lindhand Scharff and Schiott theory is applied to calculate the energy loss of different heavy nuclei in target material. Comparison between the data and calculations shows that the IQMD-GEMINI++ model can reproduce the production cross section of the neutron-deficient nuclei in spallation within 1 order of magnitude approximately. The maximum cross section of undiscovered isotope of Np, Pu, Am and Cm is about $10^{-5} $ mb, while the kinetic energy of productions are all less than 16 MeV. The angle distribution shows that the emission direction of production is in the forward downward angle mostly. The range of the production in the target is within the range of $10^{-7}$ to $10^{-5} $ cm. This range is effective target thickness for online identification of the undiscovered isotope. Based on the effective thickness of the target and assuming a intensity 120 $\mu$A of the proton beam, the yields of the undiscovered neutron-deficient nuclei are calculated. Productions of the undiscovered isotope of Np, Pu, Am and Cm by the proton-induced spallation of transuranium element are feasible. However, the experimental techniques for on-line identification of the neutron-deficient nuclei produced in the proton-induced spallation should be developed.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Production of neutron-deficient nuclei around N = 126 by proton-induced spallation*

Lei¹,

Xiao²,

Feng³

et al. 2023

Chinese Phys. C

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“…Partly because, the MNT reaction plays a crucial role for understanding nucleonnucleon correlations and for giving an opportunity to access a wide variety of nuclear structures in the far-off stability region. Besides, the MNT reaction between heavy ions is ex-pected to be an efficient approach for production of neutronrich heavy nuclei whose production is difficult by other methods [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32], supported with promising experimental evidence [33]. The production of neutron-rich superheavy nuclei in the predicted island of stability (Z = 114, 120, or 126, N = 184) is highly desired [34,35], because, in addition to fundamental interest in nuclear structures such as shell evolution [36] and shape transitions [37,38], it would provide a new stringent constraint for microscopic theories.…”

Section: Introductionmentioning

confidence: 99%

Reaction mechanism study for multinucleon transfer processes in collisions of spherical and deformed nuclei at energies near and above the Coulomb barrier: The $^{16}$O+$^{154}$Sm reaction

Roy,

Santra,

Pal

et al. 2021

Preprint

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Background: Multinucleon transfer reactions at energies around the Coulomb barrier offer a vital opportunity to study rich physics of nuclear structure and dynamics, e.g., single-particle level structure and quantum shells, mass/charge equilibration processes, energy dissipation, as well as secondary decays via particle emission or fission. Despite the continuous development in the field, we have still limited knowledge about how deformation-one of the representative nuclear structures-affects multinucleon transfer reactions.Purpose: To shed light on the effect of deformation in multinucleon transfer processes, we study the 16 O+ 154 Sm reaction at E lab = 85 MeV (around the Coulomb barrier) and 134 MeV (substantially above the Coulomb barrier), where the target nucleus, 154 Sm, is a well-established, deformed nucleus. Methods:We have performed experiments on the 16 O+ 154 Sm reaction at the BARC-TIFR pelletron-Linac accelerator facility, Mumbai, India, measuring angular distributions for various transfer products. The measured cross sections have been analyzed along with theoretical calculations based on the time-dependent Hartree-Fock (TDHF) theory, together with a statistical model for secondary deexcitation processes, GEMINI++.Results: Angular distributions for elastic scattering and for various transfer channels were measured over a wide angular range. The Q-valueand angle-integrated isotope production cross sections have been extracted from the measured angular distributions. We have successfully obtained production cross sections for various isotopes for E lab = 85 MeV, while only for four isotopes could be deduced for E lab = 134 MeV due to present experimental limitations. For the lower incident energy case, we find a reasonable agreement between the measurements and the TDHF calculations for a-few-nucleon transfer channels; whereas TDHF underestimates cross sections for many-nucleon transfers, consistent with earlier works. On the other side, we find that calculated cross sections for secondary reaction products for the higher incident energy case, qualitatively explains the measured trends of isotopic distributions observed for the lower energy. The latter observation indicates possible underestimation of excitation energies in the present TDHF+GEMINI analysis. Although certain orientation effects were observed in TDHF results, it is difficult to disentangle them from the Q-valueand angle-integrated production cross sections. Conclusions:The present analysis showed that the orientation effect in multinucleon transfer processes in the 16 O+ 154 Sm reaction is rather weak at least for the two incident energies examined. Further systematic investigations with carefully changing projectile-target combinations and collision energies, including subbarrier regime, would be required to fully uncover the effects of nuclear deformation on multinucleon transfer processes in low-energy heavy-ion reactions.

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Investigation of multinucleon transfer processes in the Langevin equation model

Zou,

Zhang,

Wang

et al. 2024

NUCL SCI TECH

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Production of neutron-rich N = 126 nuclei in multinucleon transfer reactions: Comparison between 136Xe + 198Pt and 238U + 198Pt reactions

Cited by 21 publications

References 21 publications

Production of neutron-deficient nuclei around N = 126 by proton-induced spallation*

Production of neutron-deficient nuclei around N = 126 by proton-induced spallation*

Reaction mechanism study for multinucleon transfer processes in collisions of spherical and deformed nuclei at energies near and above the Coulomb barrier: The $^{16}$O+$^{154}$Sm reaction

Investigation of multinucleon transfer processes in the Langevin equation model

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Production of neutron-rich N = 126 nuclei in multinucleon transfer reactions: Comparison between 136Xe + 198Pt and 238U + 198Pt reactions

Cited by 21 publications

References 21 publications

Production of neutron-deficient nuclei around N = 126 by proton-induced spallation*

Production of neutron-deficient nuclei around N = 126 by proton-induced spallation*

Reaction mechanism study for multinucleon transfer processes in collisions of spherical and deformed nuclei at energies near and above the Coulomb barrier: The $^{16}$O+$^{154}$Sm reaction

Investigation of multinucleon transfer processes in the Langevin equation model

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Production of neutron-rich N = 126 nuclei in multinucleon transfer reactions: Comparison between 136Xe + 198Pt and 238U + 198Pt reactions