α-decay systematics for superheavy elements

Duarte, S. B.; Teruya, N.

doi:10.1103/physrevc.85.017601

Cited by 24 publications

(16 citation statements)

References 19 publications

(50 reference statements)

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“…The a-cluster interpretation has often been used in studies on different mass regions. In heavy and superheavy mass regions, recent studies use this concept for analysis of the a-decay phenomenon [1][2][3][4]. In the light mass region, the a-cluster interpretation is combined with various approaches for describing properties of na or na + (other particles} nuclei; recent examples are the concept of nonlocalized clustering [5], the Hartree-Fock-Bogoliubov approach [6], and the quantum molecular dynamics (or its antisymmetrized version) [7,8].…”

Section: Introductionmentioning

confidence: 99%

α-cluster structure in even-even nuclei aroundMo94

Souza

Miyake

2015

Phys. Rev. C

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Background] The a-cluster model was successful for describing spectroscopic properties of light nuclei near the shell closures. Evidences of the a-cluster structure in wMo were shown, motivating the search for the same structure in other intermediate mass nuclei.[Purpose] The systematic analysis of the a-cluster structure in 94Mo and four even-even neighboring nuclei.[Method] The a-cluster model with the local potential approach.[Results] A good general description of the experimental ground state bands is obtained with only one variable parameter. It is shown that the employed a + core potential is weakly dependent on the angular momentum L and such dependence may be described satisfactorily by a simple L-dependent factor for the five nuclei. The radial parameter of the a + core potential reveals a linear trend in relation to the total nuclear radius and the sum of the a-cluster and core radii. The calculated B(E2) transition rates reproduce correctly the order of magnitude of almost all experimental data without the use of effective charges. The rms intercluster separations and reduced a widths obtained for the ground state bands point to a reduction of the a-cluster intensity with the increasing spin. Negative parity bands are calculated and compared to available experimental levels. The volume integral per nucleon pair and rms radii were calculated for the studied a + core potentials, revealing a similarity with the real parts of the optical potentials used to describe the a + 90Zr and a + 9:Mo elastic scattering at several energies. [Conclusions] This work strongly indicates the presence of similar a + core structures for the N = 52 even-even nuclei of the Mo region.

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Section: Introductionmentioning

confidence: 99%

α-cluster structure in even-even nuclei aroundMo94

Souza

Miyake

2015

Phys. Rev. C

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“…A detailed description of the approach can be found in refs. [27][28][29][30][31][32][33][34][35][36]. The half-life of the alpha decay in this approach is expressed as…”

Section: Bnn Approach Validation and Employed Massmentioning

confidence: 99%

Bayesian Neural Network improvements to nuclear mass formulae and predictions in the SuperHeavy Elements region

Rodríguez¹,

Vargas²,

Gonçalves³

et al. 2019

EPL

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A systematic study based on the Bayesian Neural Network (BNN) statistical approach is introduced to improve the predictive power of current nuclear mass formulae when applied to nuclides not yet experimentally detected. In a previous work by the present authors, the methodology was introduced considering only the Duflo-Zuker mass model (Duflo J. and Zuker A., Phys. Rev. C, 52 (1995) R23) to explore the S uperH eavy E lements (SHE) region, with focus on the α-decay process. Due to the discrepancy among different mass formulae we decided to extend in the present calculation the application of the Bayesian Neural Network methodology to other mass formula models and to discussing their implications on predictions of SHE α-decay half-lives. The -value prediction using a set of ten different mass models has been greatly improved for all models when compared to the available experimental data. In addition, we have used the improved -value to determine the SHE α-decay half-lives with a well-succeeded model in the literature, currently employed for different hadronic nuclear decay modes of heavy nuclei, the E ffective L iquid D rop M odel (ELDM). Possible SHE candidates recently investigated are explicitly calculated (specially the 298, 299,300120 isotopes, and results present a promising via of research for these nuclei through α-decay process.

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“…To study the α-decay of superheavy nuclei, physicists have developed several theoretical models, which include the generalized liquid drop model (GLDM) [17][18][19], density-dependent cluster model [20][21][22], Coulomb and proximity potential model [23][24][25], and fission-like model [26]. To better describe the α-decay using these models, physicists have proposed different interaction potentials between the α-particle and daughter nucleus, which include the proximity potential [27], Wood-Saxon potential [28], and the potential from the density functional theory [29]. For simplicity, physicists have also proposed several empirical formulas to describe α decay, such as the universal decay law (UDL) formula [30], Royer's formula [31], and Viola-Seaborg formula [32].…”

Section: Introductionmentioning

confidence: 99%

Research on α-decay for the superheavy nuclei with Z= 118–120 *

Niu

Bao

et al. 2022

Chinese Phys. C

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The generalized liquid-drop model (GLDM) with the microscopic shell correction from the relativistic Hartree-Fock (RHF) calculations is used to explore the $\alpha$-decay of superheavy nuclei. The known nuclei with $Z=106-118$ are chosen as examples for testing. The calculated half-lives of $\alpha$-decay agree the experimental data better than those from the GLDM with the shell correction in the Weizs$\ddot{a}$cker-Skyrme model. Moveover, influence of the decay energy $Q_{\alpha}$ on $\alpha$-decay is checked. It is found that the $Q_{\alpha}$ values from the WS4 model with radial basis function (RBF) correction match the experimental data well. Since these advantages, the GLDM with the RHF shell correction and the WS4-RBF $Q_{\alpha}$ values is used to predict the $\alpha$-decay lifetime for the unknown superheavy nuclei with $Z=118-120$. The trend of the available $\alpha $-decay half-lives with neutron number is similar to that from the GLDM calculation without shell correction as well as the universal decay law (UDL) formula. Comparably, the RHF shell correction depresses (raises) the $\alpha $-decay lifetime for most of nuclei with $N<186$ ($N>186$). In comparison with the half-lives of spontaneous fission, it can be concluded that the $\alpha $-decay is dominant in the superheavy nuclei $^{281-304}118$, $^{284-306}119$, and $^{287-308}120 $. These results are helpful to the exploration of superheavy nuclei in experiment.

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α-decay systematics for superheavy elements

Cited by 24 publications

References 19 publications

α-cluster structure in even-even nuclei aroundMo94

α-cluster structure in even-even nuclei aroundMo94

Bayesian Neural Network improvements to nuclear mass formulae and predictions in the SuperHeavy Elements region

Research on α-decay for the superheavy nuclei with Z= 118–120 *

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