Systematic study of the nuclear potential through high precision back-angle quasi-elastic scattering measurements of 16 O and 32 S on various targets

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dc.contributor.authorEvers, Mauritsen_AU
dc.contributor.authorDasgupta, Mahanandaen_AU
dc.contributor.authorGasques , Leandroen_AU
dc.contributor.authorHinde, Daviden_AU
dc.coverage.spatialChicago USA
dc.date.accessioned2015-12-10T22:30:49Z
dc.date.createdSeptember 22-26 2008
dc.date.issued2009
dc.date.updated2015-12-09T10:05:08Z
dc.description.abstractElastic and inelastic scattering have proven an excellent method to probe the nuclear potential in the surface region [1]. A surface diffuseness parameter of around 0.63 fm is accepted as describing elastic and inelastic scattering data. A new method to determine the diffuseness was proposed [2] using high precision quasi-elastic excitation functions at sub-barrier energies, and at backward angles. In response to this proposal, we have made measurements for 32S + Er, 186W, 197Au, 208Pb [3], and more recently for the reactions l6O + 144,154Sm, l86W, l97Au, 208Pb [4]. Both single channel and coupled-channels calculations have been performed to extract the diffuseness parameter of the nuclear potential, assuming a Woods-Saxon shape. For the reactions involving near-spherical targets, both theoretical analyses give the same diffuseness parameter, as had been hoped, showing that the effect of couplings to intrinsic excited states in the target and projectile is negligible. On the other hand, for deformed systems, coupling effects are surprisingly important even at deep sub-barrier energies, reducing the flux at backward angles. Energy spectra recorded with the back-angle Si detector show a large number of distinct peaks as well as a broad structure at even higher excitation energies. A comparison of the back-scattered energy spectra with coupled-channels calculations demonstrates that including couplings only to low lying collective states in coupled-channels calculations is inadequate in describing the reaction mechanism even at energies close to the barrier.
dc.identifier.isbn9780735406315
dc.identifier.urihttp://hdl.handle.net/1885/55256
dc.publisherAmerican Institute of Physics (AIP)
dc.relation.ispartofseriesInternational conference on New Aspects of Heavy Ion Collisions Near the Coulomb Barrier (FUSION 2008)
dc.sourceFUSION 08 - AIP Conference Proceedings
dc.source.urihttp://proceedings.aip.org/proceedings/confproceed/1098.jsp
dc.titleSystematic study of the nuclear potential through high precision back-angle quasi-elastic scattering measurements of 16 O and 32 S on various targets
dc.typeConference paper
local.bibliographicCitation.lastpage121
local.bibliographicCitation.startpage115
local.contributor.affiliationEvers, Maurits, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationDasgupta, Mahananda, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationHinde, David, College of Physical and Mathematical Sciences, ANU
local.contributor.affiliationGasques , Leandro , College of Physical and Mathematical Sciences, ANU
local.contributor.authoremailu2528469@anu.edu.au
local.contributor.authoruidEvers, Maurits, u2528469
local.contributor.authoruidDasgupta, Mahananda, u9206549
local.contributor.authoruidHinde, David, u8203491
local.contributor.authoruidGasques , Leandro , u4352530
local.description.embargo2037-12-31
local.description.notesImported from ARIES
local.description.refereedYes
local.identifier.absfor020202 - Nuclear Physics
local.identifier.ariespublicationu4155331xPUB323
local.identifier.doi10.1063/1.3108756
local.identifier.scopusID2-s2.0-65349089446
local.identifier.uidSubmittedByu4155331
local.type.statusPublished Version

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