Speaker
Dr
Ismael Martel Bravo
(University of Huelva, Spain)
Description
During the last years there have been an increasing interest in understanding the process of sub-barrier fusion
induced by halo nuclei. The fusion probability is largely affected by two main features, the extended
density distribution and the weak binding energy of these exotic systems. In addition to this, one and two neutron
transfer can also play an important role in the dynamics of the fusion process. Sub-barrier fusion of 6He was studied
in [1, 2, 3] but no clear signature of fusion enhancement was found. This picture is consistent with the observation of
large yields of alpha particles [4] which could be attributed only to neutron transfer (incomplete fusion) and projectile
breakup. However in a recent measurement [5], a large enhancement of the fusion channel was observed in the
scattering of 6He+206Pb at deep sub-barrier energies. The authors explained their finding using a sequential neutron
transfer mechanism [6] that increases the fusion probability and is able to reproduces the data. To clarify the situation
we have performed a new measurement of the fusion cross-sections for the system 6He + 206Pb, in the range of energies
14-18 MeV (Lab) using the target activation technique. The experiment was performed at the RIB facility of the Cyclotron
Research Center (UCL) at Louvain-la Neuve (Belgium). The irradiated targets were analyzed in the Detector Laboratory at
the University of Huelva (Spain). The details of the experimental method and the new fusion data will be presented and
discussed.
References
[1] N. Keeley, R. Raabe, N. Alamanos and J.L. Sida, Prog.Part.Nucl.Phys. 63,(2009) 396.
[2] J.F.Liang and C.Signorini, Int.J.Mod.Phys. E14,(2005) 1121.
[3] R. Raabe et al., Nature (London) 431, (2004) 823.
[4] J.J. Kolata, Eur. Phys. J. A 13, (2002) 117.
[5] Yu.E. Penionzhkevich, V.I. Zagrebaev, S.M. Lukyanov and R. Kolpakchieva, Phys. Rev. Lett. 96, (2006) 162701.
[6] V.I. Zagrebaev, Phys. Rev. C 67, (2003) 061601.
| Are you a student, postdoc or an attendee from an “emerging” country and would like to apply for financial support? | No |
|---|---|
| Is this an invited talk? (please answer yes or no) | No |
| Would you prefer your contribution to be an oral presentation? (please answer yes or no) | Yes |
| Would you prefer your contribution to be a poster presentation? (please answer yes or no) | No |
Authors
Dr
Angel Sanchez-Benitez
(University of Huelva, Spain)
Mr
Antonio Padilla
(University of Huelva, Spain)
Dr
Carmen Angulo
(Cyclotron Research Center (UCL), Louvain-la Neuve, Belgium)
Prof.
Cosimo Signorini
(University of Padua/INFN-LNL Legnaro, Italy)
Dr
Ismael Martel Bravo
(University of Huelva, Spain)
Dr
Jose Duenas
(University of Huelva, Spain)
Prof.
Juan Pedro Bolivar
(University of Huelva, Spain)
Prof.
Krzysztof Rusek
(Andrezj Soltan Institute for Nuclear Studies, Warsaw, Poland)
Dr
Luis Acosta
(University of Huelva, Spain)
Mr
Lukasz Standylo
(Flerov Laboratory of Nuclear Reaction, JINR, Dubna, Russia)
Dr
Marco Mazzocco
(University of Padua/INFN-LNL Legnaro, Italy)
Dr
Mauro Romoli
(INFN Napoly, Italy)
Prof.
Mikail Golovkov
(Flerov Laboratory of Nuclear Reaction, JINR, Dubna, Russia)
Mr
Rafael Berjillos
(University of Huelva, Spain)
Prof.
Roman Wolski
(Flerov Laboratory of Nuclear Reaction, JINR, Dubna, Russia)
Dr
Thomas Keutgen
(Cyclotron Research Center (UCL), Louvain-la Neuve, Belgium)
