| 1. |
- Fan, G. W., et al.
(författare)
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Density distribution of 8Li and 8B$ and capture reaction at low energy
- 2015
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Ingår i: Phys. Rev. C. ; 91
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Tidskriftsartikel (refereegranskat)abstract
- Reaction cross sections of 8Li on stable targets were measured at intermediate energies. With the existing experimental data of interaction cross sections at 790 MeV/nucleon the nucleon density distribution of 8Liwas extracted by the use of the modified Glauber model. Meanwhile, the existing data of 8B have been also reanalyzed. Structures of 8Li and 8B were compared through the density. On the basis of dilute surface densities, the discussion of 7Li(n,γ)8Li and 7Be(p,γ)8B capture reactions was performed within the framework of the direct capture reaction mechanism. The calculations agreed quite well with the experimental data as well as other analyses.
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| 2. |
- Fan, G. W., et al.
(författare)
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Structure of 8Li from a reaction cross-section measurement
- 2014
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Ingår i: Phys. Rev. C. - American Physical Society. ; 90, s. 044321-
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Tidskriftsartikel (refereegranskat)abstract
- We have precisely measured reaction cross sections (σR) for 8Li using 9Be, 12C, 27Al, and proton targets at intermediate energies by the transmission method. From the energy dependence of the σR including the high energy data, the density distribution of 8Li was deduced through a modified Glauber model. It is shown that 8Li has a shorter tail structure in the density as compared with that of 8B and the matter radius of 8Li is similar to those of the other nonhalo Li isotopes. The result is consistent with the previous experiments that there is a tendency for 8Li to be a skin nucleus.
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| 3. |
- Qian, Yibin, et al.
(författare)
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Improved evaluation of nuclear charge radii for superheavy nuclei
- 2018
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Ingår i: Journal of Physics G. - : IOP PUBLISHING LTD. - 0954-3899 .- 1361-6471. ; 45:8
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Tidskriftsartikel (refereegranskat)abstract
- Although significant progress has been made in the synthesis of superheavy nuclei, the experimental knowledge of them is still very limited while the alpha decay chain is the main tool used to identify newly produced superheavy nuclei. Previously, we have extracted nuclear charge radii of superheavy nuclei via the experimental alpha decay data. As a further step, the density dependent cluster model is improved by introducing the difference between the density distributions of protons and neutrons. Besides, the important quantity, i.e., the alpha preformation factor, is connected with the microscopic correction of nuclear mass during this procedure, to perform a more reasonable description of the alpha decay process. It is found that the present deduced nuclear charge radii of heavy nuclei are in a better agreement with the measured values as compared to those in our previous evaluations. Subsequently, the nuclear radii of heavier even-even isotopes with Z = 98-116 are probed, accompanied by the consistency with the empirical evaluations. Moreover, the effect of the depressed density at the center of superheavy nucleus on the final extracted nuclear radius plus the decay lifetime is discussed, which appears to be different from the case of lighter nuclide.
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| 4. |
- Wu, Shuangxiang, et al.
(författare)
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Half-lives of alpha-decaying nuclei in the medium-mass region within the transfer matrix method
- 2018
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Ingår i: Physical Review C. - : American Physical Society. - 2469-9985 .- 2469-9993. ; 97:5
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Tidskriftsartikel (refereegranskat)abstract
- The alpha-decay half-lives of even-even nuclei from Sm to Th are systematically studied based on the transfer matrix method. For the nuclear potential, a type of cosh-parametrized form is applied to calculate the penetration probability. Through a least-squares fit to experimental half-lives, we optimize the parameters in the potential and the a preformation factor P-0. During this process, P-0 is treated as a constant for each parent nucleus. Eventually, the calculated half-lives are found to agree well with the experimental data, which verifies the accuracy of the present approach. Furthermore, in recent studies, P-0 is regulated by the shell and paring effects plus the nuclear deformation. To this end, P-0 is here associated with the structural quantity, i.e., the microscopic correction of nuclear mass (E-mic). In this way, the agreement between theory and experiment is greatly improved by more than 20%, validating the appropriate treatment of P-0 in the scheme of E-mic.
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