Half-lives of α decay from natural nuclides and from superheavy elements

Qian, Yibin; Ren, Zhongzhou

doi:10.1016/j.physletb.2014.09.024

Cited by 39 publications

(20 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…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.…”

mentioning

confidence: 99%

α -decay properties of 118296 from double-folding potentials

Mohr

2017

Phys. Rev. C

View full text Add to dashboard Cite

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...

show abstract

mentioning

confidence: 99%

α -decay properties of 118296 from double-folding potentials

Mohr

2017

Phys. Rev. C

View full text Add to dashboard Cite

show abstract

“…The agreement to the results of Refs. [25][26][27][28][29][30] for partial and total half-lives seems to be also good.…”

Section: Resultsmentioning

confidence: 99%

Alpha-decay and spontaneous fission half-lives of super-heavy nuclei around the doubly magic nucleus²⁷⁰Hs

Silişteanu

Anghel

2016

EPJ Web of Conferences

View full text Add to dashboard Cite

Abstract. The α-decay and spontaneous fission half-lives of nuclei around 270 Hs are calculated with formulas derived from an in-depth analysis of the available experimental data and of results of theoretical models. The parameters of these formulas result from the fit of half-lives with respect to the reaction energies, the height of the SF barrier and the fissionability. The calculated partial and total half-lives are compared with the experimental data and results of other approximations. Half-life predictions are made for many unknown nuclei.

show abstract

“…The agreement to the results of Refs. [26,27,28,29,30,31] for partial and total half-lives seems to be also good.…”

Section: Spontaneous Fission Half-livesmentioning

confidence: 92%

Alpha and spontaneous fission decay properties of nuclei with 104 < Z < 112 and 158 < N < 166

Anghel¹,

Silişteanu²

2017

AIP Conference Proceedings

View full text Add to dashboard Cite

Abstract. Simple relationships derived from the systematics of experimental and calculated α-decay and spontaneous fission halflives are used to predict half-lives for many undiscovered nuclides around 270 Hs. α half-lives are calculated within the shell model rate theory in terms of the formation and reaction amplitudes. Estimations for spontaneous fission half-lives are performed within a dynamical approach defined essentially by the shape, the height of fission barrier and nuclear deformations. Systematic trends in evolution of the decay properties with Z, N and the valence proton and neutron numbers are illustrated and discussed.

show abstract

Half-lives of α decay from natural nuclides and from superheavy elements

Cited by 39 publications

References 52 publications

α -decay properties of 118296 from double-folding potentials

α -decay properties of 118296 from double-folding potentials

Alpha-decay and spontaneous fission half-lives of super-heavy nuclei around the doubly magic nucleus²⁷⁰Hs

Alpha and spontaneous fission decay properties of nuclei with 104 < Z < 112 and 158 < N < 166

Contact Info

Product

Resources

About

Half-lives of α decay from natural nuclides and from superheavy elements

Cited by 39 publications

References 52 publications

α -decay properties of 118296 from double-folding potentials

α -decay properties of 118296 from double-folding potentials

Alpha-decay and spontaneous fission half-lives of super-heavy nuclei around the doubly magic nucleus270Hs

Alpha and spontaneous fission decay properties of nuclei with 104 < Z < 112 and 158 < N < 166

Contact Info

Product

Resources

About

Alpha-decay and spontaneous fission half-lives of super-heavy nuclei around the doubly magic nucleus²⁷⁰Hs