Empirical Formula for Heavy Cluster Decay from Superheavy Elements

2021 ◽  
Author(s):  
K. Prathapan ◽  
R. K. Biju
Keyword(s):  
Empirical Formula ◽  
Superheavy Elements ◽  
Cluster Decay ◽  
Heavy Cluster

ON THE ELECTRON EXPULSION IN HEAVY ION NATURAL RADIOACTIVITY AND NUCLEAR FRAGMENTATION

2001 ◽  
Vol 10 (04n05) ◽  
pp. 367-372 ◽  
Author(s):  
G. STRATAN ◽  
W. SCHEID
Keyword(s):  
Electron Emission ◽  
Natural Radioactivity ◽  
Spontaneous Fission ◽  
Daughter Nucleus ◽  
Heavy Ion ◽  
Cluster Decay ◽  
Nuclear Fragmentation ◽  
Relative Probability ◽  
Α Decay ◽  
Heavy Cluster

An estimation of the relative probability of electron expulsion from inner shells of atoms following heavy cluster decay or nuclear spontaneous fission is performed. The calculation takes into account the recoil of the daughter nucleus, both in the case of dipole and quadrupole terms. The results show an enhancement of the electron emission probability in comparison with the case of α-decay.

scholarly journals Limitations of the Geiger-Nuttall law in heavy cluster decay

2021 ◽  
Vol 103 (2) ◽  
Author(s):  
Omar Nagib ◽  
Ahmed M. Hamed
Keyword(s):  
Cluster Decay ◽  
Heavy Cluster

STUDY OF CLUSTER RADIOACTIVITY: THE INFLUENCE OF DEFORMATION OF THE CLUSTER AND DAUGHTER NUCLEI ON CLUSTER DECAY HALF-LIVES

2013 ◽  
Vol 22 (08) ◽  
pp. 1350065 ◽  
Author(s):  
D. NADERI
Keyword(s):  
Experimental Data ◽  
Daughter Nucleus ◽  
Cluster Decay ◽  
Wkb Method ◽  
Deformed Nuclei ◽  
Heavy Cluster ◽  
Cluster Radioactivity ◽  
Neck Thickness

In this paper, the heavy cluster half-lives were calculated using the Wentzel–Kramers–Brillouin (WKB) method. First, we have considered the cluster and daughter nuclei as spherical and the half-lives have been obtained. Then, we have assumed two nuclei as deformed ones and calculations have been performed once again. Deformations of the emitted cluster and daughter nucleus have been presented in terms of elongation and neck thickness parameters. We investigated the influence of elongation and neck thickness parameters on cluster decay half-lives. Our results show that half-lives are affected by these parameters and obtained results for deformed nuclei are in better agreement with experimental data.

scholarly journals Heavy cluster decay of trans-zirconium ‘‘stable’’ nuclides

1985 ◽  
Vol 32 (6) ◽  
pp. 2198-2200 ◽  
Author(s):  
D. N. Poenaru ◽  
W. Greiner ◽  
M. Ivascu ◽  
A. Sandulescu
Keyword(s):  
Cluster Decay ◽  
Heavy Cluster ◽  
Stable Nuclides

Semi-empirical formula for alpha and cluster decay half-lives of superheavy nuclei

2019 ◽  
Vol 35 (06) ◽  
pp. 2050016 ◽  
Author(s):  
H. C. Manjunatha ◽  
N. Sowmya ◽  
A. M. Nagaraja
Keyword(s):  
Atomic Number ◽  
Empirical Formula ◽  
Alpha Decay ◽  
Cluster Decay ◽  
Superheavy Nuclei ◽  
Number Range ◽  
Semi Empirical

We have formulated a semi-empirical formula for alpha decay half-lives and cluster decay half-lives for superheavy nuclei of atomic number range [Formula: see text]. We have compared the logarithmic half-lives produced by the present formula with that of experiments and other formulae, such as universal decay law (UDL) [H. C. Manjunatha and K. N. Sridhar, Eur. Phys. J. A 53, 156 (2017)] and Horoi et al. [Horoi et al., J. Phys. G[Formula: see text] Nucl. Part. Phys. 30, 945 (2004)], Univ [D. Ni and Z. Ren, Phys. Rev. C 74, 014304 (2006)], Royer [G. Royer, J. Phys. G: Nucl. Part. Phys. 26, 1149 (2000)] and VSS [S. A. Gurvitz and G. Kalbermann, Phys. Rev. Lett. 59, 262 (1987)]. The constructed formula produces logarithmic half-lives for alpha and cluster decay (4He,9Be, [Formula: see text]B, [Formula: see text]C, [Formula: see text]N, [Formula: see text]O, [Formula: see text]F, [Formula: see text]Ne, [Formula: see text]Na, [Formula: see text]Mg, [Formula: see text]Al, [Formula: see text]Si, [Formula: see text]P, [Formula: see text]S, [Formula: see text]Cl, [Formula: see text]Ar, [Formula: see text]K and [Formula: see text]Ca) in superheavy nuclei of atomic number range [Formula: see text].

Influence of free convection on the diffusion current to a sphere in a laminar forced flow regime

1985 ◽  
Vol 50 (12) ◽  
pp. 2697-2714
Author(s):  
Arnošt Kimla ◽  
Jiří Míčka
Keyword(s):  
Asymptotic Expansion ◽  
Free Convection ◽  
Boundary Value Problem ◽  
Concentration Gradient ◽  
Empirical Formula ◽  
Convective Diffusion ◽  
Forced Flow ◽  
Diffusion Current ◽  
Wide Range ◽  
Free And Forced Convection

The formulation and solution of a boundary value problem is presented, describing the influence of the free convective diffusion on the forced one to a sphere for a wide range of Rayleigh, Ra, and Peclet, Pe, numbers. It is assumed that both the free and forced convection are oriented in the same sense. Numerical results obtained by the method of finite differences were approximated by an empirical formula based on an analytically derived asymptotic expansion for Pe → ∞. The concentration gradient at the surface and the total diffusion current calculated from the empirical formula agree with those obtained from the numerical solution within the limits of the estimated errors.

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