Properties of $ \alpha$ -decay to ground and excited states of heavy nuclei

2010 ◽  
Vol 44 (2) ◽  
pp. 287-295 ◽  
Author(s):  
Y. Z. Wang ◽  
J. Z. Gu ◽  
J. M. Dong ◽  
B. B. Peng
Keyword(s):  
Excited States ◽  
Alpha Decay ◽  
Heavy Nuclei

LX-ray Spectra and E2 Internal Conversion Coefficients in Radon and Radium

1973 ◽  
Vol 28 (10) ◽  
pp. 1635-1641 ◽  
Author(s):  
A. G. de Pinho ◽  
M. Weksler
Keyword(s):  
Excited States ◽  
Internal Conversion ◽  
Electric Quadrupole ◽  
Alpha Decay ◽  
X Ray ◽  
Internal Conversion Coefficients ◽  
Conversion Coefficients ◽  
Good Agreement

The X-ray spectra resulting from the internal conversion of electric quadrupole transitions following the alpha decay of Th230 and Ra226 were analysed with a Si (Li) spectrometer. From the knowledge of the Coster-Kronig and fluorescence yields, the internal conversion coefficients of the E2 transitions from the first excited states in Ra226 and Rn222 could be deduced. Results are in good agreement with theoretical values.

scholarly journals CHARGE RADII OF β-STABLE NUCLEI

2006 ◽  
Vol 21 (24) ◽  
pp. 1889-1900 ◽  
Author(s):  
G. K. NIE
Keyword(s):  
Stable Isotopes ◽  
Stable Isotope ◽  
Electron Scattering ◽  
Cluster Structure ◽  
Alpha Decay ◽  
Heavy Nuclei ◽  
Β Decay ◽  
Charge Radii ◽  
The Core

In a previous work it was shown that the radius of a nucleus R is determined by the α-cluster structure and can be estimated on the number of α-clusters disregarding the number of excess neutrons. A hypothesis was also made that the radius Rm of a β-stable isotope, which is actually measured at electron scattering experiments, is determined by the volume occupied by the matter of the core plus the volume occupied by the charge of the peripheral α-clusters. In this paper it is shown that the condition Rm = R restricts the number of excess neutrons filling the core to provide the β-stability. The number of peripheral clusters can vary from 1 to 5 and the value of R for heavy nuclei almost does not change, whereas the number of the excess neutrons should change with the number of peripheral clusters to provide the condition of Rm = R. It can explain the path of the β-stability and its width. The radii Rm of the stable isotopes with 12 ≤ Z ≤ 83 and the alpha-decay isotopes with 84 ≤ Z ≤ 116 that are stable to β-decay have been calculated.

Alpha decay half-lives of heavy nuclei within a generalized liquid drop model

2009 ◽  
Vol 33 (S1) ◽  
pp. 95-97 ◽  
Author(s):  
Zhang Hong-Fei ◽  
Wang Zu-Kai ◽  
Cheng Xi-Meng ◽  
Zuo-Wei ◽  
Li Jun-Qing
Keyword(s):  
Liquid Drop ◽  
Alpha Decay ◽  
Heavy Nuclei ◽  
Liquid Drop Model

Alpha decay half-lives for heavy and super-heavy isotopes

2017 ◽  
Vol 26 (05) ◽  
pp. 1750024
Author(s):  
S. S. Hosseini ◽  
H. Hassanabadi ◽  
S. Zarrinkamar
Keyword(s):  
Experimental Data ◽  
Kinetic Energy ◽  
Half Life ◽  
Potential Model ◽  
Alpha Decay ◽  
Decay Energy ◽  
Heavy Nuclei ◽  
Proximity Potential ◽  
Empirical Estimates ◽  
Super Heavy Nuclei

We considered the systematics of Alpha-decay (AD) half-life (HL) of super-heavy nuclei (SHN) versus the decay energy and the total [Formula: see text]-kinetic energy. We have considered a potential model with Yukawa proximity potential and thereby calculated the HLs. Our results compared with experimental data and the empirical estimates. Also, we obtained [Formula: see text]-preformation factors from the ratio between theoretical and experimental results for a few super heavy nuclei. The results indicate the acceptability of the approach.

Alpha decay of even–even nuclei in the region to the ground state and excited states of daughter nuclei

2011 ◽  
Vol 850 (1) ◽  
pp. 34-52 ◽  
Author(s):  
K.P. Santhosh ◽  
Sabina Sahadevan ◽  
Jayesh George Joseph
Keyword(s):  
Excited States ◽  
Ground State ◽  
Alpha Decay

Alpha-decay widths and equivalence of optical potentials

1985 ◽  
Vol 63 (9) ◽  
pp. 1253-1257 ◽  
Author(s):  
M. L. Chaudhury ◽  
S. K. Agrawal
Keyword(s):  
Rare Earth ◽  
Coulomb Potential ◽  
Alpha Decay ◽  
Exchange Term ◽  
Heavy Nuclei ◽  
Optical Potentials ◽  
Decay Widths ◽  
Static Part ◽  
Good Agreement

Decay widths and relative intensities of the alpha spectra of some rare-earth and heavy nuclei are calculated, taking the barrier, as in the previous treatments, to be the usual Coulomb potential superposed by a nonlocal alpha–nucleus potential with an exchange term. For the static part of the barrier, different forms of optical potentials are now used, and calculated relative intensities are in good agreement with the observed values. It is found that the exchange term is important in the odd-parity transitions, and the different optical potentials are equivalent for the cases considered.

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