Abstract
The reaction 11Li(p,t)9Li(gs) at an incident energy of 4 MeV is treated in terms of a simplistic distorted-wave Born approximation transfer. The halo neutrons involved in the reaction are treated as a di-neutron cluster transferred in a simultaneous process. This appears to be a good approximation of the mechanism. The dominant contribution to the reaction comes from the known (1s1/2)2 structure component of the ground state of 11Li, and the cross section angular distribution seems to be relatively insensitive to the fact that 11 Li has an anomalously large radius due to its Borromean halo properties. Significantly this simple treatment of the reaction is in much better agreement with the experimental angular distribution than a more sophisticated calculation.
Highlights
Proton-induced two-nucleon transfer represents a convenient method to study an exotic nucleus such as 11Li [1, 2]
The short lifetime of about 8 ms of 11Li causes a slight experimental complication to the measurement of cross section angular distributions for a two-neutron pickup reaction, which is properly written as 1H(11Li, 9Li)3H to reflect the inverse kinematics required for a radioactive beam
In order to extract information regarding the prominence of two-nucleon correlations in 11Li from experimental measurements of the (p,t) reaction, the distorted-wave Born approximation (DWBA) promises to be a useful tool
Summary
Proton-induced two-nucleon transfer represents a convenient method to study an exotic nucleus such as 11Li [1, 2]. The motivation for the importance of a sequential, two-step mechanism in nucleon-induced two-nucleon transfer is inspired by concerns that the absolute magnitude of the cross sections predicted by the DWBA seems to be much too low when compared with some experimental values.
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