"Theoretical description of cluster radioactivity in Ba isotopes"
Michał Warda, UMCS, Lublin
(id #137)
Seminar: YesPoster: No
Invited talk: No
Cluster radioactivity is an exotic nuclear decay predicted by Sandulescu et al.
[1] and discovered in 1984 by Rose and Jones [2]. In this process light nucleus
($^{14}$C -$^{32}$Si) is emitted. Heavy mass residue is doubly magic $^{208}$Pb
or similar nucleus. Cluster radioactivity has been found in 20 isotopes from
actinides region. Another region of possible cluster radioactivity was predicted
near doubly magic $^{100}$Sn. In this domain $^{12}$C or $^{14}$C clusters would
be emmited from Ba isotopes. Such events have not been experimentally confirmed
[3,4] and only upper limits of this decay were established.
We want to investigate cluster radioactivity in Ba isotopes. We will consider
this decay as fission with very large mass asymmetry between fragments. We will
analyse potential energy surfaces calculated in Hartree-Fock-Bogoliubov theory
with Gogny force [5]. Constrains on quadrupole and octupole moments applied in
the self-consistent calculations allow to control simultaneously elongation as
well as reflection asymmetry of the fissioning system. This method was
successfully applied for studies of cluster radioactivity in actinides [6,7,8].
[1] A. Sandulescu, D.N. Poenaru and W. Greiner, Sov. J. Part Nucl. 11, 528 (1980).
[2] H.J. Rose and G.A. Jones, Nature 307, 245 (1984).
[3] A. Guglielmetti, et al., Phys. Rev. C 52, 740 (1995).
[4] Z. Janas, et al., Nucl. Phys. A 627, 119 (1997).
[5] M. Warda, J. L. Egido, L. M. Robledo and K. Pomorski, Phys. Rev. C 66, 014310 (2002).
[6] J.L. Egido and L.M. Robledo, Nucl. Phys. A 738, 31 (2004).
[7] L.M. Robledo and M. Warda, Int. J. Mod. Phys. E 17, 204 (2008).
[8] L.M. Robledo and M. Warda, Int. J. Mod. Phys. E 17, 2275 (2008).
[1] and discovered in 1984 by Rose and Jones [2]. In this process light nucleus
($^{14}$C -$^{32}$Si) is emitted. Heavy mass residue is doubly magic $^{208}$Pb
or similar nucleus. Cluster radioactivity has been found in 20 isotopes from
actinides region. Another region of possible cluster radioactivity was predicted
near doubly magic $^{100}$Sn. In this domain $^{12}$C or $^{14}$C clusters would
be emmited from Ba isotopes. Such events have not been experimentally confirmed
[3,4] and only upper limits of this decay were established.
We want to investigate cluster radioactivity in Ba isotopes. We will consider
this decay as fission with very large mass asymmetry between fragments. We will
analyse potential energy surfaces calculated in Hartree-Fock-Bogoliubov theory
with Gogny force [5]. Constrains on quadrupole and octupole moments applied in
the self-consistent calculations allow to control simultaneously elongation as
well as reflection asymmetry of the fissioning system. This method was
successfully applied for studies of cluster radioactivity in actinides [6,7,8].
[1] A. Sandulescu, D.N. Poenaru and W. Greiner, Sov. J. Part Nucl. 11, 528 (1980).
[2] H.J. Rose and G.A. Jones, Nature 307, 245 (1984).
[3] A. Guglielmetti, et al., Phys. Rev. C 52, 740 (1995).
[4] Z. Janas, et al., Nucl. Phys. A 627, 119 (1997).
[5] M. Warda, J. L. Egido, L. M. Robledo and K. Pomorski, Phys. Rev. C 66, 014310 (2002).
[6] J.L. Egido and L.M. Robledo, Nucl. Phys. A 738, 31 (2004).
[7] L.M. Robledo and M. Warda, Int. J. Mod. Phys. E 17, 204 (2008).
[8] L.M. Robledo and M. Warda, Int. J. Mod. Phys. E 17, 2275 (2008).
