Elastic scattering of alpha particles on 39K at Eα = 22.1−28.2 MeV

Bobrowska, A.; Budzanowski, A.; Grotowski, K.; Jarczyk, L.; Micek, S.; Niewodnicźański, H.; Strzak̵owski, A.; Wróbel, Zygmunt

doi:10.1016/0375-9474(69)90471-0

Cited by 52 publications

(31 citation statements)

References 23 publications

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“…Finally, we shall shortly comment on the results from the inelastic α-particle scattering. Our data, as well as the previous results from the same region, [12,15,16,17,18], show no trace of a change in cross section as the Q-value for the 4α-emisson is reached or surpassed. Therefore it seems unlikely that at a specific energy, just above the corresponding Q-value, all the elastic cross section would concentrate in a single reaction channel.…”

Section: Fragmentssupporting

confidence: 78%

“…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: 59%

“…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%

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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: Fragmentssupporting

confidence: 78%

Section: Experimental Procedures and Excitation Functionsupporting

confidence: 59%

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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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“…I+M=even Under the condition of strong absorption, t/l may be expressed as Equation (4). The parameters will be used as adjustable parameters to reproduce the experimental angular distribution of the elastic scattering, note that L is related to R through…”

Section: ~O 1 (8"~lz](or)"mentioning

confidence: 99%

“…The anomalous large angle e-particle scattering effect (ALAS) has been observed in a number of different light and medium nuclei at various energies well above the coulomb barrier [1][2][3][4]. Indeed this "ALAS" has been of increasing interest in recent years and has been the subject of symposiums at Marburg [5] and Cracow [6].…”

Section: Introductionmentioning

confidence: 99%

Single pole dominance in ?-elastic and inelastic scattering from calcium isotopes

Abul-Magd

Khalil

Shalaby³

1977

Z Physik A

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The presence of a "zero-pole" in nuclear diagonal S-matrix was found to be dominant in both elastic and inelastic scattering angular distributions of e-particles (E--24 and 29 MeV) on Ca 4~nuclei. The inelastic scattering amplitudes were evaluated by making use of the derivative relation of Austern and Blair for one and two phonon excitation mechanism. Reduced matrix elements C1(I ) and deformation lengths BIR are derived. Consistent vibrational model description for Ca 4~ energy levels is presented.

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