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South African Journal of Science

On-line version ISSN 1996-7489
Print version ISSN 0038-2353

S. Afr. j. sci. vol.103 n.3-4 Pretoria Mar./Apr. 2007

 

RESEARCH ARTICLES

 

New theories of α-radioactivity

 

 

P.O.G. Ogunbade; S.A. Rakityansky

Physics Department, University of South Africa, P.O. Box 392, Pretoria 0003, South Africa

 

 


ABSTRACT

We review the radioactive decay of nuclei via emission of α-particles using three different theoretical approaches. The half-lives of the radioactive nuclei, calculated using these three methods, are compared with each other and with available experimental data. The results show that the superasymmetric fission model with the double-folding procedure for obtaining the α-nucleus potential is the most reliable among the three models studied.


 

 

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REFERENCES

1. Gamow G. (1928). Zur Quantentheorie des Atomkernes. Z. Phys. 51, 204-212.         [ Links ]

2. Condon E.U. and Guerney R.W. (1929). Quantum mechanics and radioactive disintegration. Phys. Rev. 33, 127-140.         [ Links ]

3. Mang H.J. (1964). Alpha decay. Ann. Rev. Nucl. Sci. 14, 1-28.         [ Links ]

4. Greiner W., Ivassscu M., Poenaru D. N and Sauaundulescu A. (1989). Cluster radioactivity. In Treatise on Heavy Ion Science, vol. 8., ed. D.A. Bromley, pp. 641-722. Plenum, New York.         [ Links ]

5. Sauaundulescu A. and Greiner W. (1992). Cluster decay. Rep. Prog. Phys. 55, 1423-1481.         [ Links ]

6. Buck B., Merchant A.C. and Perez S.M. (1990). New look at a decay of heavy nuclei. Phys. Rev. Lett. 65, 2975-2977.         [ Links ]

7. Buck B., Merchant A.C. and Perez S.M. (1991). Groundstate to ground state alpha decays of heavy even-even nuclei. J. Phys. G: Nucl. Part. Phys. 17, 1223-1235.         [ Links ]

8. Buck B., Merchant A.C. and Perez S.M. (1992). a decay calculations with a realistic potential. Phys. Rev. C 45, 2247-2253.         [ Links ]

9. Buck B., Merchant A.C. and Perez S.M. (1993). Half-lives of favored alpha decays from nuclear ground states. At. Data Nucl. Data Tables 54, 53-73.         [ Links ]

10. Buck B., Merchant A.C. and Perez S.M. (1995). Systematics of alpha-cluster states above double shell closures. Phys. Rev. C 51, 559-565.         [ Links ]

11. Brown B.A. (1992). Simple relation for alpha decay half-lives. Phys. Rev. C 46, 811-814.         [ Links ]

12. Poenaru D.N. and Ivascu D. (1983). Estimation of the alpha decay half-lives. J. Physique 44, 791-796.         [ Links ]

13. Delion D.S. and Sauaundulescu A. (2002). Towards a self-consistent microscopic a-decay theory. J. Phys. G: Nucl. Part. Phys. 28, 617-625.         [ Links ]

14. Delion D.S. and Liotta R.J. (1998). Microscopic description of a-decay from super deformed nuclei. Phys. Rev. C 58, 2073-2080.         [ Links ]

15. Delion D.S., Insolia A. and Liotta R.J. (1996). New single particle basis for microscopic description of decay processes. Phys. Rev. C 54, 292-301.         [ Links ]

16. Poenaru D N., Schnabel D., Greiner W., Mazilu D. and Gherghescu R. (1991). Nuclear lifetimes for cluster radioactivities. At. Data Nucl. Tables 48, 231-327.         [ Links ]

17. Lovas R.G., Loitta R.J., Insolia A., Varga K. and Delion D.S. (1998). Microscopic theory of cluster radioactivity. Phys. Rep. 294, 265-362.         [ Links ]

18. Poenaru D N., Greiner W., Depta K., Ivauauscu M., Mazilu D and Sandulescu A. (1986). Calculated half-lives and kinetic energies for spontaneous emission of heavy ions from nuclei. At. Data Nucl. Tables 34, 423-538.         [ Links ]

19. Gurvitz S.A. and Kalbermann G. (1987). Decay width and shift of a quasi-stationary state. Phys. Rev. Lett. 59, 262-265.         [ Links ]

20. Gurvitz S.A. (1988). Novel approach to tunnelling problems. Phys. Rev. A 38, 1747-1759.         [ Links ]

21. Arima A. and Yoshida S (1974). Analysis of α-decay widths of light 4n nuclei. Nucl. Phys. A 219, 475-515.         [ Links ]

22. Satchler G.R. and Love W.G. (1979). Folding model potentials from realistic interactions for heavy-ion scattering. Phys. Rep. 55 183-254.         [ Links ]

23. Kobos A.M., Brown B.A., Lindsay R. and Satchler G.R. (1984). Folding model analysis of elastic and inelastic α-particle scattering using a density-dependent force. Nucl. Phys. A 425, 205-232.         [ Links ]

24. Harada K. and Rauscher E.A. (1968). Unified theory of alpha decay. Phys. Rev. 169, 818-824.         [ Links ]

25. McFadden L. and Satchler G.R. (1966). Optical-model analysis of the scattering of 24.7 MeV alpha particles. Nucl. Phys. 84, 177-200.         [ Links ]

26. Brandan M.E. and Satchler G.R. (1997). The interaction between light heavy-ions and what it tells us. Phys. Rep. 285, 143-243.         [ Links ]

27. Chaudhuri A.K. (1986). A density-dependent interaction in the folded alpha-nucleus potential. Nucl. Phys. A 449, 243-250.         [ Links ]

28. Basu D.N. (2002). Spontaneous heavy cluster emission rates using microscopic potential. Phys. Rev. C 66, 027601 1-4.         [ Links ]

29. Basu D.N. (2003). Role of effective interaction in nuclear disintegration processes. Phys. Lett. B 566, 90-97.         [ Links ]

30. Basu D.N. (2003). Folding model analysis of alpha radioactivity. J. Phys. G: Nucl. Part. Phys. 29, 2079-2085.         [ Links ]

31. Cook J. (1982). DFPOT-A program for the calculation of double-folded potentials. Comput. Phys. Commun. 25, 125-139.         [ Links ]

32. Audi G. and Wapstra A.H. (1995). The 1995 update to the atomic mass evaluation. Nucl. Phys. A 595, 409-480.         [ Links ]

33. Atzrott U., Mohr P., Abele H., Hillenmayer C. and Staudt G. (1996). Uniform α-nucleus potential in a wide range of masses and energies. Phys. Rev. C 53, 1336-1347.         [ Links ]

34. Khoa Dao. T. (2001). α-nucleus optical potential in the double-folding model. Phys. Rev. C 63, 034007 1-15.         [ Links ]

 

 

Received 12 December 2005
Accepted 5 January 2007.

 

 

One of us (P.O.G.O.) wishes to express his gratitude to the University of South Africa for financial support, and to acknowledge fruitful discussions with B.N. Basu.
*
Author for correspondence. E-mail: rakitsa@science.unisa.ac.za

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