Quadrupole and Octupole Excitations of the Even Tin Isotopes by Electron Scattering

Curtis, T. H.; Eisenstein, R. A.; Madsen, D.W.; Bockelman, C. K.

doi:10.1103/physrev.184.1162

Cited by 59 publications

(6 citation statements)

References 42 publications

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“…For the 3& transition, the good fit seen in Fig. 5 gives a value of B(C3) 1' in very good agreement with the previous Tassie results [30]. If we use a phonon, not Tassie, nuclear model, smaller values of 8 ( CL ) are obtained.…”

Section: Low-iying States Of " Snsupporting

confidence: 88%

“…In Table II these results are compared to previous electromagnetic results at lower momentum transfers. Our results for the 2i+ transition disagree beyond the stated statistical uncertainties with previous model-independent electron-scattering results at lower momentum transfer [30] and with Coulomb excitation [31]. Since we did not achieve accurate data at low momentum transfers for this transition, this disagreement is not surprising.…”

Section: Low-iying States Of " Sncontrasting

confidence: 84%

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Inelastic electron scattering to collective states ofSn118

et al. 1991

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Elastic and inelastic electron scattering has been carried out on " Sn with q,z ranging from 0.40 to 1.15 fm . Form factors for the giant isovector dipole and isoscalar quadrupole peaks have been obtained and compared to collective model calculations, with methods closely parallel to those used to treat alpha particle and pion scattering to these same states. The charge responses determined by pion and electron scattering agree within uncertainties for the giant quadrupole peak.

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Section: Low-iying States Of " Snsupporting

confidence: 88%

Section: Low-iying States Of " Sncontrasting

confidence: 84%

Inelastic electron scattering to collective states ofSn118

et al. 1991

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“…7), 58 Ni [69] and 62 Ni [70] (Fig. 8), 116 Sn [71][72][73], 118 Sn [71,72] and 124 Sn [71,74] (Fig. 9).…”

Section: Resultsmentioning

confidence: 99%

Charge and matter distributions and form factors of light, medium, and heavy neutron-rich nuclei

et al. 2005

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Results of charge form factors calculations for several unstable neutron-rich isotopes of light, medium, and heavy nuclei (He, Li, Ni, Kr, Sn) are presented and compared to those of stable isotopes in the same isotopic chain. For the lighter isotopes (He and Li) the proton and neutron densities are obtained within a microscopic large-scale shell-model, while for heavier ones Ni, Kr, and Sn the densities are calculated in deformed self-consistent mean-field Skyrme HF+BCS method. We also compare proton densities to matter densities together with their rms radii and diffuseness parameter values. Whenever possible comparison of form factors, densities and rms radii with available experimental data is also performed. Calculations of form factors are carried out both in plane wave Born approximation (PWBA) and in distorted wave Born approximation (DWBA). These form factors are suggested as predictions for the future experiments on the electron-radioactive beam colliders where the effect of the neutron halo or skin on the proton distributions in exotic nuclei is planned to be studied and thereby the various theoretical models of exotic nuclei will be tested.

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“…The present results are substantially more precise than those of the previous Coulomb-excitation work of Jonsson et al (1981), which used the gamma-gamma coincidence technique. The accuracy of the inelastic-electron-scattering data is limited by the model dependence of the analyses; Curtis et al (1969), for example, did not assign conventional errors for this reason. The three theoretical calculations are all based upon the spherical shell model, all allow for core excitations, and none of them introduces effective charges.…”

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confidence: 99%

“…The calculation of Gillet et al (1969) is more sophisticated than the other two; a more realistic finite-range interaction is used, and the input data are taken from neighbouring odd-mass nuclei, with no adjustable parameters. \l Curtis (1969) (e, eJ 6. Barreau (1969) The experimental and theoretical values are further compared in Fig.…”

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confidence: 99%

Measurement of Reduced Electric Octupole Transition Probabilities, B(E3; 01??..31), for 118,120,122Sn

Baxter¹,

Burnett²,

MiIler³

1989

Aust. J. Phys.

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Values of reduced electric octupole transition probabilities, B(E3; ot -3 1 ), for the nuclides llB,120,122Sn have been determined using Coulomb excitation with 12C projectiles. The results are in good agreement with shell-model calculations made without introducing effective charges but involving core excitations. Values for B(E2; ot -2t) are also presented.The chief purpose of this brief communication is to present the results of some new measurements of reduced electric octupole transition probabilities. B(E3; ot ..... 3i). for transitions from the 0+ ground state to the first 3-state of the nuclides 118,120,122Sn. Apart from the value of such information in contributing to the overall systematics of E3 excitations. which are much more poorly established than the corresponding E2 systematics (Spear 1989), the results may be compared with specific theoretical predictions made on the basis of various refinements of the shell model (Veje 1966;Lombard and Campi-Benet 1966;Gillet et al. 1969). Values are also presented for electric quadrupole transition probabilities. B(E2; Ot ..... 2t). for transitions to the first 2+ states. although the measurement of these was subordinate to the main objective of the work.The measurements were performed using Coulomb excitation by 37-MeV and 38-MeV 12C projectiles obtained from the 14UD accelerator at the ANU. Targets, typically of thickness 10 Jig cm-2 • were prepared by evaporating isotopically enriched tin onto thin carbon foils. The isotopic enrichments of 118Sn• 120Sn and 122Sn were 96·0%. 98·4% and 92·3% respectively. Scattered particles were detected at a laboratory angle of 90· using an Enge split-pole magnetic spectrometer with a position-sensitive multi-electrode gas-filled proportional counter at its focal plane.A typical position spectrum is shown in Fig. 1. The major peaks correspond to scattering to the ot, 2t and 3i states of the target nucleus (122Sn). The structure on the low-energy side of the ot ('elastic') peak is due to elastic scattering from other isotopes of tin present at low concentrations in the target material ('isotopic impurities'). The spectrum shown is for 12C ions in the 6+ atomic charge state; some 5+ ions were also observed. but they were 0004-9506/89/010041$03.00

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Quadrupole and Octupole Excitations of the Even Tin Isotopes by Electron Scattering

Cited by 59 publications

References 42 publications

Inelastic electron scattering to collective states ofSn118

Inelastic electron scattering to collective states ofSn118

Charge and matter distributions and form factors of light, medium, and heavy neutron-rich nuclei

Measurement of Reduced Electric Octupole Transition Probabilities, B(E3; 01??..31), for 118,120,122Sn

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