Evidence for giant quadrupole excitation in 208Pb by 200 MeV 12C scattering

Kamermans, R.; Driel, J. Van; Morsch, H. P.; Wilczyńskí, J.; Woude, A. van der

doi:10.1016/0370-2693(79)90740-8

Cited by 20 publications

(4 citation statements)

References 10 publications

(13 reference statements)

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“…Finally we point out that several features of the spectra obtained in the heavy ion induced reactions e.g. the strong forward peaking and the difference in the position of the maxima in the fragment energy single and coincidence spectra [23,24] can easily be explained using rather simple direct break-up model given in the present paper. In these processes one piece of the projectile interacts inelastically with the target nucleus.…”

Section: Resultsmentioning

confidence: 95%

Experimental and theoretical study of the elastic break-up of the alpha particle on58Ni nuclei atE ?=172.5 MeV

et al. 1979

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The triton-proton angular correlation function has been measured for the 5 SNi(e ' t p)5 8Ni reaction leading to the ground state of the targetnucleus.The obtained experimental data have been interpreted in terms of the direct break-up (fragmentation) of the alpha particle on the target nucleus potential. It is shown that the main features of the measured double differential cross section are well predicted by the DWBA theory of the break-up. The dependence of the elastic and inclusive break-up cross sections upon the fragment-target interaction potentials is discussed.

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Section: Resultsmentioning

confidence: 95%

Experimental and theoretical study of the elastic break-up of the alpha particle on58Ni nuclei atE ?=172.5 MeV

et al. 1979

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“…Apart from the well known excitation of low-lying states, the Giant Quadrupole Resonance (GQR) has attracted particular attention [1]. In different studies with heavy ions as projectiles [2][3][4] the excitation of the GQR in different targets was observed. The identification of other multipole resonances turned out to be very difficult, mainly because the characteristic dependence of angular distributions on multipolarity, typically seen in inelastic scattering of a-particles, is not observed in heavy ion scattering.…”

Section: Introductionmentioning

confidence: 99%

Inelastic scattering of20Ne and12C on58Ni and the three-body continuum

et al. 1985

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Using beams of 2~at 291 and 392 MeV and 12C at 300 MeV the inelastic excitation of collective modes in SSNi has been studied with a Q3D magnetic spectrometer. In the analysis different contributions are unfolded from the spectra: 1. single lines, 2. the inelastic continuum, 3. the three-body continuum, which mainly originates from onenucleon pick-up to unbound states followed by the nucleon emission. Special care was taken to calculate the spectral shape and strength of this process. The population of unbound 21Ne-states is measured in a neutron-2~ coincidence experiment. Coupled channel calculations have been performed to extract the deformation parameters for the inelastic states, including mutual excitation. For the giant quadrupole resonance 70 ~ of the energy weighted sum rule is found. The excitation of higher multipoles is calculated and extrapolated to higher incident energies (50 MeV/u). The importance of the inelastic excitation as a "doorway process" to more complex interactions is discussed. It is found that especially the excitation of the projectile (2~ takes a large fraction (20-50 ~) of the incoming flux in the first step,

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“…We show on figure 14 an angular distribution for the entire peak (8)(9)(10)(11)(12)(13)(14)(15)(16) shown in figure 13. We have assumed that the peak contains excitation of the IVGDR (100% EWSR), ISGQR (70% EWSR), ISGMR (100% EWSR), and ISGHR (10% EWSR).…”

Section: Figure 13mentioning

confidence: 99%

“…However, note in the oxygen spectrum the large rise in ;cross section at excitation energies just below the of the quadrupole resonance. This large peak arises from excitation of states in the 1 *0 projectile and [sub'stantially reduce contamination of the heavy ion inelastic spectra from jpiojectile excitation by choosing a projectile that is unbound to neutron jemiisvion.at very low energy, projectiles such as 13 C or 17 0. Figure 6 shows jfour inelastic scattering spectra from 20a Pb.…”

Section: Figurementioning

confidence: 99%