Abstract.
The neutron transfer in a very heavy asymmetric nuclear system, in 206 Pb + 118 Sn has been measured using particle-\(\gamma\) coincidence techniques with position-sensitive detectors, 5 EUROBALL-Cluster detectors (EB) and the Heidelberg-Darmstadt NaI-CRYSTAL BALL (CB). The fragments are identified via the known \(\gamma\)-decays of the lowest excited states using the high resolution of EB. Using the unique feature of the set-up with the CB, transfer to well-defined final channels with known quantum numbers is selected using the high-efficiency multiplicity filter of the CB with no second \(\gamma\)-ray, i.e. without feeding. The enhancement in the two-neutron transfer is deduced, for population of the low-lying super-fluid 2 + states in 120 Sn and 116 Sn, while the 2n-transition remains in the ground state for the recoiling 20XPb-nuclei. Large enhancements up to EF \(\simeq 10^3\) are observed. This is the first observation of neutron pair-transfer enhancement for a heavy nuclear binary system with superfluid properties with experimentally separated levels.
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Received: 6 November 2002, Revised: 25 March 2003, Published online: 23 March 2004
PACS:
24.10.Eq Coupled-channel and distorted-wave models - 25.70.Hi Transfer reactions
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von Oertzen, W., Peter, I., Thummerer, S. et al. Selection of cold transfer and enhanced neutron-pair transfer in the 206 Pb + 118 Sn reaction. Eur. Phys. J. A 20, 153–156 (2003). https://doi.org/10.1140/epja/i2002-10342-y
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DOI: https://doi.org/10.1140/epja/i2002-10342-y