Toward a better parameterization of nuclear density for α-decay calculation

Ismail, M.; Ellithi, A. Y.; Adel, A.; Abdulghany, A. R.

doi:10.1016/j.nuclphysa.2015.12.008

Cited by 8 publications

(14 citation statements)

References 27 publications

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“…16,37 Great efforts have been done in the experiment and theory in this field, while the developments in heavy-ion beam technology have been also accelerating the experimental synthesis and theoretical research. [40][41][42] For SHN, α decay as a dominant decay mode can provides abun-dant nuclear structure information such as the nuclear shell structure, properties of ground state and so on. [43][44][45][46][47][48][49][50][51][52] Up to now, various theoretical models, such as cluster model, 53 generalized liquid drop model, 54 fission-like model 55 and so on, have been used to study the α decay half-lives.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Predictions of α decay half-lives for even–even superheavy nuclei with 104 ≤ Z ≤ 128 based on two-potential approach within cluster-formation model

Deng

et al. 2019

Int. J. Mod. Phys. E

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In present work, we systematically study the α decay half-lives of 170 even-even nuclei with 60 Z 118 within the two-potential approach while the α decay preformation factor Pα is obtained by the cluster-formation model. The calculated results can well reproduce the experimental data. In addition, we extend this model to predict the α decay half-lives of 64 even-even nuclei with 104 Z 128 whose α decay is energetically allowed or observed but not yet quantified. For comparing, the two famous models i.e. SemFIS proposed by D. Poenaru et al. [Europhys. Lett. 77 (2007) 62001] and UDL proposed by C. Qi et al. [Phys. Rev. Lett. 103 (2009) 072501] are used. The predicted results of these models are basically consistent. At the same time, through analyzing the changing trend of α decay energy Qα of Z = 118, 120, 122, 124, 126 and 128 isotopes nuclei with the increasing of neutron number N and that of α decay preformation factor Pα of those isotopes even-even nuclei with the increasing of neutron number N, N = 178 may be a new neutron magic number.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Predictions of α decay half-lives for even–even superheavy nuclei with 104 ≤ Z ≤ 128 based on two-potential approach within cluster-formation model

Deng

et al. 2019

Int. J. Mod. Phys. E

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“…For completeness it should be noted that there is another method for an independent determination of Q α from the systematics of Q α differences of neighboring nuclei; unfortunately, the published values end at 295 118 and do not include 296 118 [16]. The application of double-folding potentials for α-decay in a simple α+nucleus two-body model has been described in detail already in [2], and it has been applied and further developed in a series of α-decay studies in the last years (e.g., [17][18][19][20][21][22][23][24][25][26][27]). Here I briefly repeat the essential points.…”

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confidence: 99%

α -decay properties of 118296 from double-folding potentials

Mohr

2017

Phys. Rev. C

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α-decay properties of the yet unknown nucleus 296 118 are predicted using the systematic behavior of parameters of α-nucleus double-folding potentials. The results are Qα = 11.655 ± 0.095 MeV and T 1/2 = 0.825 ms with an uncertainty of about a factor of 4.PACS numbers: 23.60.+e,27.90.+b,21.60.Gx Very recently, Sobiczewski [1] has analyzed the decay properties of the yet unknown nucleus 296 118 using a combination of Q α values from mass models and a phenomenological formula for the α-decay half-lives. This study was motivated by ongoing experiments which attempt to synthesize this heaviest nucleus to date. The present work uses a completely different approach which is based on the smooth and systematic bahavior of α-decay parameters using double-folding potentials [2].Sobiczewski Cn ("chain-2") where only the two latter α-decays are known from experiment. The selection of the mass formulae leads to a restricted range of Q α for 296 118 from 11.62 MeV (WS3+), 11.73 MeV (WS4+), and 12.06 MeV (HN), and the corresponding α-decay half-lives are 4.8 ms (WS3+), 2.7 ms (WS4+), and 0.50 ms (HN). This range of predictions of almost one order of magnitude for the α-decay half-life of 296 118 does not yet include an additional uncertainty of the phenomenological formula of [3] which is on average a factor of 1.34 for even-even nuclei and does not exceed a factor of 1.78 in most cases [3].In a further study Budaca et al. [9] have applied empirical fitting formulae for the prediction of the decay properties of 296 118. They obtain a slightly lower Q α = 11.45 MeV and half-lives of about 3 ms. A very low value of Q α = 10.185 MeV is derived from mass formulae in [10,11], leading to predicted half-lives up to minutes for 296 118. Half-lives of the order of 1 ms have been obtained in [12] using the WS4+ Q α and various empirical formulae for the half-life, and similar half-lives slightly below 1 ms were found very recently in [13, 14] * Email: WidmaierMohr@t-online.de; mohr@atomki.mta.hu which are also based on Q α from WS4+.For completeness it has to be mentioned that α-decay is the dominant decay mode of 296 118. Partial half-lives of 296 118 for spontaneous fission have been estimated in [1,15]; they exceed the α-decay half-life by several orders of magnitude.Contrary to the study of Sobiczewski and the other recent calculations for 296 118 [9][10][11][12], the present approach does not use mass models for the prediction of the unknown Q α of 296 118 which is the most important quantity for the prediction of its half-life. Instead, the smooth behavior of parameters is used which is obtained in calculations with systematic double-folding potentials [2]. This method is particularly well suited for the present case where the available experimental results for chain-1 and chain-2 have to be extrapolated only to a very close neighbor. For completeness it should be noted that there is another method for an independent determination of Q α from the systematics of Q α differences of neighboring nuclei; unfortunately, the publishe...

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“…Alpha-decay is a prominent decay channel of heavy and superheavy nuclei (SHN) and acts as an effective probe for the nuclear structure [1][2][3][4][5][6][7][8][9][10][11]. α-decay can provide a powerful and very precise tool to identify new superheavy elements studied at accelerator centers such as Berkeley, GSI, Dubna, GANIL, and RIKEN [12][13][14].…”

Section: Introductionmentioning

confidence: 99%