Deep Sub-Barrier Fusion Enhancement in the {sup 6}He+{sup 206}Pb Reaction

Journal Article · Fri Apr 28 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.96.162701· OSTI ID:20775184

Penionzhkevich, Yu E; Zagrebaev, V I; Lukyanov, S M; Kalpakchieva, R ^[1]

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1. Flerov Laboratory of Nuclear Reaction, JINR, Dubna, Moscow Region (Russian Federation)

The fusion of {sup 6}He with {sup 206}Pb has been studied at energies close to and below the Coulomb barrier. The experiment was carried out at the Dubna Radioactive Ion Beams complex of FLNR, JINR. The {sup 6}He beam intensity was about 5x10{sup 6} pps, the maximum energy being 60.3{+-}0.4 MeV. The yield of the {sup 210}Po isotope, produced in the 2n-evaporation channel, demonstrates an extremely large enhancement of the sub-barrier fusion cross section as compared with the {sup 4}He+{sup 208}Pb reaction. This enhancement is most likely due to the mechanism of 'sequential fusion' with an intermediate neutron transfer from {sup 6}He to the Pb nucleus with positive Q values.

• OSTI ID: 20775184
• Journal Information: Physical Review Letters, Vol. 96, Issue 16; Other Information: DOI: 10.1103/PhysRevLett.96.162701; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
COULOMB FIELD
CROSS SECTIONS
HEAVY ION FUSION REACTIONS
HELIUM 6 REACTIONS
INTERMEDIATE NEUTRONS
JINR
LEAD 206 TARGET
LEAD 208 TARGET
MEV RANGE 10-100
POLONIUM 210
RADIOACTIVE ION BEAMS