<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>α</mml:mi></mml:math>decay chains in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msup><mml:mrow /><mml:mrow><mml:mn>271</mml:mn><mml:mo>−</mml:mo><mml:mn>294</mml:mn></mml:mrow></mml:msup></mml:math>115 superheavy nuclei

Santhosh, K. P.; Priyanka, B.; Joseph, Jayesh George; Sahadevan, Sabina

doi:10.1103/physrevc.84.024609

Cited by 43 publications

(19 citation statements)

References 68 publications

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“…We also verified that our half-life calculation offers deviation quite similar to that obtained for few superheavy elements in Ref. [18], which incorporated explicitly the deformation effect. Indeed, we can see in Fig.…”

Section: Present Worksupporting

confidence: 84%

α-decay systematics for superheavy elements

Duarte

Teruya

2012

Phys. Rev. C

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In this Brief Report we extend the α-decay half-life calculation to the superheavy emitter region to verify whether these nuclei satisfy the recently observed systematics [D. N. Poenaru et al., Phys. Rev. C 83, 014601 (2011); C. Qi et al., Phys. Rev. C 80, 044326 (2009)]. To establish the systematics, we have used the α-cluster potential description, which was originally developed to study α decay in connection with nuclear energy level structure [B. Buck et al., Phys. Rev. C 51, 559 (1995)]. The quantum-mechanical tunneling calculation has been employed to obtain the half-lives, showing that with this treatment the systematics are well reproduced in the region of heavy nuclei. Finally, the half-life calculation has been extended to the superheavy emitters to verify whether the systematics can still be observed.The analysis of α-decay half-life is an important tool to study nuclear level structure. Almost twenty years ago a considerable effort was invested in this direction, and a sequence of papers studied nuclear potential forms to reproduce the nuclear level distribution of the nuclei involved in the process [3][4][5]. The α-cluster model was designed with this purpose and used to determine half-lives of a wide range of ground-state α emitters. In the last version of this model [3] a Wood-Saxon-like potential form together with the semiclassical Bohr-Sommerfeld orbit quantization rule have been successfully applied for intermediate mass and heavy emitters. In these last months, the use of this potential form to reproduce the properties of first levels in ground-state spectral bands of the 90 Sr and 98 Pd nuclei has been reported, assuming the α-cluster structure for these nuclear systems [6].Recently α-decay studies were revisited by looking for a sort of universal decay law for the families of oddeven, even-even, and even-odd α emitters, which could be extended to heavier cluster emission processes [2,7]. A systematic behavior of half-lives was recognized by using the semiclassical approach (WKB barrier penetrability) with a nuclear potential obtained by the folding of the nucleonnucleon interaction with the nuclear density of the nascent fragments [1,8].A simple linear relation for experimental half-life values of α-decay in heavy-nuclei regions was observed in Ref.[9], showing that a straight line can be adjusted for the logarithm of half-lives as a function of Z 0.6 d / √ Q. Another type of empirical analysis [10] of experimental data provided general relationships to obtain half-lives for large-mass regions of α emitters, accounting for different values of angular momentum.In this Brief Report we use the α-cluster potential with the same parameters introduced in the original version [3]; however, we use an approach formally distinct from the BornSommerfeld orbit quantization treatment to determine halflives in the original α-cluster model.The α-cluster model potential is given by a Wood-Saxonlike form,where the potential parameter (depth, diffuseness, and the mix parameters, V 0 , a, and β,respectively) ...

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Section: Present Worksupporting

confidence: 84%

α-decay systematics for superheavy elements

Duarte

Teruya

2012

Phys. Rev. C

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“…Furthermore, for even-even, even-odd, odd-even and odd-odd nuclei showed that RDMSs for even-even parent nuclei were significantly decreased. The proximity potential is used to study the properties of the SHN α-decay, such as (256−339) 110 [36], and also for the α-decay chains (271−310) 118 [37], (270−301) 117 [38,39], (271−294) 115 [40], 255−314 113 [41], and (255−350) 111 [42] in which the half-lives estimation were in good agreement with the experimental values.…”

Section: Introductionmentioning

confidence: 99%

Systematic study of α-decay half-lives of super-heavy nuclei with 106≤Z≤118

Ghodsi

Hassanzad

2019

Nuclear Physics A

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The α-decay half-lives of the superheavy nuclei are systematically studied using different versions of proximity potential and a exact method to calculate Coulomb potential between spherical and deformed nuclei in the framework of the double folding model. To reproduce the α-decay half-life, the experimental α-decay energy and Wentzel-Kramers-Brillouin approximation have been used. It is found that the computed values by the Ngô 80 are in good compromise with the experimental half-lives in comparison with other versions. Also, by using this version and within QW S4 for determination α-decay energies for superheavy elements, we had predicted the α-decay half-lives for superheavy nuclei which have not been reported yet. The long half-lives with magnitude about 100 seconds are predicted for the superheavy nuclei which are not in stability islands which indicating remarkable stability in comparison with their neighbors. These results are also in good agreement with the predictions of other semi-empirical formulas.PACS numbers:

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“…The Coulomb and proximity potential model (CPPM) [41,42] and its modified version, the Coulomb and proximity potential model for deformed nuclei (CPPMDN) [43] is being used by the Santhosh et al, since the last decade for the cluster decay and alpha decay studies of heavy [44][45][46][47] and superheavy nuclei [48][49][50][51][52]. The recent studies on the α transitions from both the ground state and the isomeric states [53], α fine structure studies of eveneven [43], even-odd [54], odd-even [55] and odd-odd [56] nuclei, studies on the α decay half lives of the isotopes of Bi nuclei [47] and the theoretical predictions on the alpha decay chains of the isotopes of Z = 115 [49], 117 [50,51] and 119 [52] have proved the validity and applicability of both CPPM and CPPMDN. The present paper deals with an investigation on the cluster decay of eveneven clusters 4 He, 8 Be, 10 Be, 14 [30,31], the Universal (UNIV) curve of Poenaru et al [34,35] and the Scaling Law of Horoi et al [57] have been used for the comparison of our calculations.…”

Section: Introductionmentioning

confidence: 99%

Heavy particle radioactivity from superheavy nuclei leading to 298114 daughter nuclei

Santhosh

Priyanka

2014

Nuclear Physics A

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Abstract.The feasibility for the alpha decay and the heavy particle decay from the even-even superheavy (SH) nuclei with Z = 116-124 have been studied within the Coulomb and proximity potential model (CPPM). The Universal formula for cluster decay (UNIV) of Poenaru et al., the Universal Decay Law (UDL) of Qi et al., and the Scaling Law of Horoi et al., has also been used for the evaluation of the decay half lives. A comparison of our predicted half lives with the values evaluated using these empirical formulas are in agreement with each other and hence CPPM could be considered as a unified model for alpha and cluster decay studies. The spontaneous fission half lives of the corresponding parents have also been evaluated using the semi-empirical formula of Santhosh et al. Within our fission model, we have studied cluster formation probability for various clusters and the maximum cluster formation probability for the decay accompanying 298 114 reveals its doubly magic behavior. In the plots for log 10 (T 1/2 ) against the neutron number of the daughter in the corresponding decay, the half life is found to be the minimum for the decay leading to 298 114(Z = 114, N = 184) and this also indicate its doubly magic behavior. Most of the predicted half lives are well within the present upper limit for measurements ) 10 ( 30 2 / 1 s T < and the computed alpha half lives for 290,292 116 agrees well with the experimental data. We have thus confidently indicate towards a new island for the cluster radioactivity around the superheavy isotope 298 114 and its neighbors and we hope to receive experimental information about the cluster decay half lives of these considered SHs', hoping to confirm the present calculations.

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αdecay chains in271−294115 superheavy nuclei

Cited by 43 publications

References 68 publications

α-decay systematics for superheavy elements

α-decay systematics for superheavy elements

Systematic study of α-decay half-lives of super-heavy nuclei with 106≤Z≤118

Heavy particle radioactivity from superheavy nuclei leading to 298114 daughter nuclei

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