Barrier distributions from the fusion of oxygen ions with {sup 144,148,154}Sm and {sup 186}W

Journal Article · Fri Dec 01 04:00:00 EST 1995 · Physical Review, C

DOI:https://doi.org/10.1103/PhysRevC.52.3151· OSTI ID:132944

Leigh, J R; Dasgupta, M; Hinde, D J; Mein, J C; Morton, C R; Lemmon, R C; Lestone, J P; Newton, J O; Timmers, H; Wei, J X ^[1]; Rowley, N ^[2]

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1. Department of Nuclear Physics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 0200 (Australia)
2. Department of Astronomy and Physics, The University of Manchester, Manchester M13 9PL (United Kingdom)

Fusion excitation functions for the reactions {sup 144,148,154}Sm and {sup 186}W + {sup 16}O and {sup 144}Sm + {sup 17}O have been measured with high precision, both in the cross sections and the small energy intervals, thus allowing meaningful fusion barrier distributions to be extracted. In this representation it is clearly seen that the excitation functions are not smooth and featureless; each is unique and is shown to depend on the details of the structure of the interacting nuclei. The effects of excitation of the collective single phonon states in {sup 144}Sm are evident. For the {sup 17}O projectile, the role of additional coupling to neutron stripping channels with positive {ital Q} values can be seen. As expected, the barrier distributions associated with {sup 154}Sm and {sup 186}W are dominated by deformation effects. However, the data appear to display sensitivity to additional couplings, even though they involve relatively weak inelastic and transfer channels.

• OSTI ID: 132944
• Journal Information: Physical Review, C, Journal Name: Physical Review, C Journal Issue: 6 Vol. 52; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
CROSS SECTIONS
EXCITATION FUNCTIONS
HEAVY ION FUSION REACTIONS
OXYGEN 16 REACTIONS
OXYGEN 17 REACTIONS
PHONONS
SAMARIUM 144 TARGET
SAMARIUM 148 TARGET
SAMARIUM 154 TARGET
SENSITIVITY
TUNGSTEN 186 TARGET