Energy dependence of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">Li</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>6</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math><mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mo>+</mml:mo></mml:mrow><mml:mrow><mml:mn>28</mml:mn></mml:mrow></mml:msup></mml:m

Tiede, Manfred; Trcka, Darryl; Kemper, K. W.

doi:10.1103/physrevc.44.1698

Cited by 28 publications

(13 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The threshold anomaly is a channel coupling effect that manifests itself as a pronounced rise in the surface strength of the real part of the optical model potential, associated with a sharp drop in the imaginary part as the incident energy is reduced towards the Coulomb barrier (see, e.g., [29,30] and references therein). The threshold anomaly has been found to be present for 7 Li but absent from 6 Li elastic scattering [12,[31][32][33], the lower breakup threshold of 6 Li being found to play a major role in this difference [13].…”

Section: Discussionmentioning

confidence: 94%

Generation of a repulsive dynamic polarization potential by transfer couplings

Keeley¹,

Alamanos²,

Rusek

et al. 2005

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

A series of coupled reaction channels calculations for the 9 Be+ 209 Pb system at near-barrier energies is presented. Single neutron stripping couplings leading to several states in 209 Pb together with coupling to the direct breakup of 9 Be using a 5 He+α cluster model are included. We find that the transfer couplings give rise to a dynamic polarization potential with the same characteristics in the nuclear surface region as that produced by breakup.

show abstract

Section: Discussionmentioning

confidence: 94%

Generation of a repulsive dynamic polarization potential by transfer couplings

Keeley¹,

Alamanos²,

Rusek

et al. 2005

Phys. Rev. C

Self Cite

View full text Add to dashboard Cite

show abstract

“…Later it was conjectured by Mahaux, Ngo, and Satchler [15] that for loosely bound nuclei, this anomaly may be absent. Recent studies of the threshold anomaly in 6,7 Li-induced reactions lead to contradictory conclusions: a cancellation between the attractive (dispersive) component and the repulsive dynamic polarization potential [45,46], dynamic polarization potentials of opposite sign for 6,7 Li [47], and breakup suppression above the barrier energies [48].…”

Section: Dispersion Relationmentioning

confidence: 99%

Refractive effects in the scattering of loosely bound nuclei

et al. 2004

View full text Add to dashboard Cite

A study of the interaction of the loosely bound nuclei 6,7 Li at 9 and 19 MeV/ nucleon with light targets has been undertaken. With the determination of unambiguous optical potentials in mind, elastic data for four projectile-target combinations and one neutron transfer reaction 13 C͑ 7 Li, 8 Li͒ 12 C have been measured over a large angular range. The kinematical regime encompasses a region where the mean field (optical potential) has a marked variation with mass and energy, but turns out to be sufficiently surface transparent to allow strong refractive effects to be manifested in elastic scattering data at intermediate angles. The identified exotic feature, a "plateau" in the angular distributions at intermediate angles, is fully confirmed in four reaction channels and is interpreted as a prerainbow oscillation resulting from the interference of the barrier and internal barrier far-side scattering subamplitudes.

show abstract

“…In this case, Woods-Saxon potentials are also usually used for the imaginary part. However, when weakly bound nuclei are studied [1,8,12,[14][15][16], the corresponding real part of the folding potential needs to be weakened by about 60% in order to fit the data.…”

Section: Introductionmentioning

confidence: 99%

“…For the 6 Li projectile, which has a break-up ͑␣ + d͒ threshold energy of 1.48 MeV and no bound excited state below this value, the threshold anomaly is not present in the scattering on 208 Pb [8], 138 Ba [9], and 28 Si [10,16]. On the contrary, the imaginary potential may increase at energies around the Coulomb barrier [8,9], when heavy targets are used.…”

Section: Introductionmentioning

confidence: 99%

Threshold anomaly with weakly bound projectiles: Elastic scattering ofBe9+Al27

et al. 2004

View full text Add to dashboard Cite

Elastic scattering of the weakly bound 9 Be on 27 Al was measured at near barrier energies. The optical model data analysis with the real and imaginary parts of a global double-folding potential does not show strong evidence of the usual threshold anomaly. The same result was obtained by using a Woods-Saxon shape optical potential and calculating the potential strengths at the strong absorption radius. The reason for this behavior may be explained by the presence of break-up and/or transfer channels at low energies.

show abstract

Energy dependence ofLi6+28

Cited by 28 publications

References 17 publications

Generation of a repulsive dynamic polarization potential by transfer couplings

Generation of a repulsive dynamic polarization potential by transfer couplings

Refractive effects in the scattering of loosely bound nuclei

Threshold anomaly with weakly bound projectiles: Elastic scattering ofBe9+Al27

Contact Info

Product

Resources

About