Fonctions d'excitation à 174° pour la diffusion élastique de particules alpha de 18 à 22 MeV par les noyaux 23Na, 24-25-26 Mg, 27Al, 28Si et 40Ca

Lega, J.; Macq, Pierre

doi:10.1051/jphys:01971003205-6036900

Cited by 15 publications

(12 citation statements)

References 6 publications

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“…This behaviour seems suspicious, however, a similar drop-off has been observed in several investigations before, see [12,15,16,17,18]. But the feature has gone unnoticed, and has not been discussed to any detail.…”

Section: Experimental Procedures and Excitation Functionsupporting

confidence: 58%

“…The structure of the data confirms the previous findings in refs. [12,15,16,17,18]. The present data reaches beyond the intensity drop by more than 3 MeV.…”

Section: Data Analysis and Resultsmentioning

confidence: 47%

“…Also another break-up, namely 32 S → Table 2: Threshold energies for all possible break-ups of 32 S into configurations X(+Y)+n • α, that is, one or two heavy multiple-alpha fragments X(+Y), e.g. 12 C, 16 O, ..., and n additional α-particles. The physics behind break-up phenomena has been suggested to be that the αparticles form a kind of Bose gas on the nuclear surface of 16 O, that is, a kind of α-particle matter on a core nucleus, as discussed in [31].…”

Section: Reduction Of Cross Section At High Energiesmentioning

confidence: 99%

“…12 C, 16 O, ..., and n additional α-particles. The physics behind break-up phenomena has been suggested to be that the αparticles form a kind of Bose gas on the nuclear surface of 16 O, that is, a kind of α-particle matter on a core nucleus, as discussed in [31]. However, the α-particles must carry away about 12h of angular momentum, so there remains (at least) the problem of an angular-momentum barrier.…”

Section: Reduction Of Cross Section At High Energiesmentioning

confidence: 99%

“…In the present work the potential is parametrized according to the prescription of [41,42], where a universal potential was obtained by fitting to data of α+ 16 O and α+ 40 Ca. The present potential,…”

Section: A Potential Model For the α+ 28 Si Elastic Cross Sectionmentioning

confidence: 99%

See 4 more Smart Citations

Study of the high-lying, high-spin α +²⁸Si resonance structure in³²S

Lönnroth¹,

Källman²,

Guttormsen³

et al. 2011

J. Phys. G: Nucl. Part. Phys.

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The structure of highly excited elastic α-scattering resonances in 32 S was studied with the reaction 28 Si(α, α 0) 28 Si at beam energies between 22 and 30 MeV. The data were collected with a thick-target method giving continuous energies. The properties of 24 resonances in the spin range = 9 − 12h, and up to 32 MeV excitation in 32 S, were determined. The strong drop-off in elastic cross section at about 27.5 MeV laboratory energy was studied, and a similar but less drastic effect is observed at 21.5 MeV. Some possible explanation for these behaviours are discussed. The present results complement previous high-resolution data at lower energies, and favours the interpretation of the resonances as α-cluster states. The implications on potential models from resonances with angular momenta as high as 12h are discussed.

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Section: Experimental Procedures and Excitation Functionsupporting

confidence: 58%

“…The structure of the data confirms the previous findings in refs. [12,15,16,17,18]. The present data reaches beyond the intensity drop by more than 3 MeV.…”

Section: Data Analysis and Resultsmentioning

confidence: 47%