Electron-Scattering Study of Nuclear Levels in Cobalt, Nickel, Lead, and Bismuth

Crannell, H.; Helm, R.; Kendall, Henry W.; Oeser, J.; Yearian, M. R.

doi:10.1103/physrev.123.923

Cited by 155 publications

(23 citation statements)

References 28 publications

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“…The data points are from Ref. 26 Hence it follows that our calculated p3(r) agrees quite well with the experimental curve of Ref. 24 in what concerns the outer peak-apart from a multiplying factor for this spatial region.…”

Section: B) the First 3-state In 2~supporting

confidence: 75%

Nuclear structure investigations in spherical heavy nuclei by means of inelastic electron scattering

Theis

1972

Z. Physik

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Inelastic electron scattering form factors for the low-lying 2 + and 3-excitations in SSSr and the first 3-excitation in 2~are calculated on the basis of a microscopic nuclear model making use of various residual two-particle interactions. The aim is to draw conclusions from the comparison of the theoretical and experimental data upon the nuclear model itself and upon the employed residual interactions. Further experimental data especially for high momentum transfers will be needed for the excitations in SSSr. The existing data for 2~ show that the used effective interactionsare not yet satisfactory.

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Section: B) the First 3-state In 2~supporting

confidence: 75%

Nuclear structure investigations in spherical heavy nuclei by means of inelastic electron scattering

Theis

1972

Z. Physik

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“…result of Crannel et al (1961) is considerably smaller than the value based on the investigation of Morinaga and Takahashi (1959), who reported the observation of the cross over transition in 60 Ni with a branching of 4 x 10-7 . This value+ is definitely excluded by the upper li~it from our conversion electron experiment.…”

Section: Inelastic A-particle Scatteringcontrasting

confidence: 60%

“…In these cases from previous investigations (Morinaga and Takahashi 1959, Crannel et al 1961, Rebel et al 1972a, Baker,and Tickle 1972, Pitthan 1973) enhanced hexadecapole transitions are expected to be possibly observable in the direct electromagnetic decay of the 4t states. In addition to the electromagnetic studies and supplementing previous results Rebel 1975b, Rebel 1976)we investigated also the excitation of the 4t states by inelastic scattering of 104 MeV a-particles and extracted the isoscalar L=4 transition rates by procedures which are extensively described elsewhere (Rebel 1976).…”

Section: Experimentelle Studien Der Hexadekapol-bewegung In Sphärischmentioning

confidence: 65%

Experimental studies of hexadecapole motion in spherical nuclei

Faust

Hanser

Klewe‐Nebenius

et al. 1978

J. Phys. G: Nucl. Phys.

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The 0+ + 41 hexadecapole transitions in 60Ni and 140Ce have experimentally been investigated by means of a-particle scattering as well as by , , + spectroscopy of the electromagnetic decay of the 4 1 states. In the case of 60Ni an upper limitof 1 x 10-7 was found for the branching of the , , , + ' E4 and E2 cascade decay of the 4 1 state by conversion electron spectroscopy. It corresponds toan enhancement factor G 4 < 9.0 s.p:u., while the a-particle scattering measurement~result in G 4 = (5.5 ± 0.8) s.p.u~.In 140Ce the 4t + 0+cross-over y-decay has been observed with an enhancement of G 4 = (11.8~0.7) s.p.u. in very good agreement with the value G 4 = (13 ± 2) s.p.u. from the a-particle scattering experiments. The eValuation of the a-particie scattering cross sections isbased on a spec~fic reaction mo~el (folding model). The , ' + + ' , . , , experimental results from the direct (4 1 + 0 ) decay are considered to be an empirical test of model dependenceof the procedures extracting L = 4 transition rates from a-particle scattering. Compiling several similar results the consistency of the method~appliedas well as the evidence and some implications of hexadecapole motion in spherical nuclei are briefly discus~ed. EXPERIMENTELLE STUDIEN DER HEXADEKAPOL-BEWEGUNG IN SPHÄRISCHEN KERNEN ZUSAMMENFASSUNG:Die 0+ + 4~Hexadekapol-übergänge in 60Ni und 140Ce wurden experimentell sowohl durch a-Teilchenstreuung als auch durch Beobachtung des elektromagnetischen Zerfalls der 4~-Zustände untersucht. Im Falle von 60Ni wurde mittels Konversionselektronenspektroskopie eine obere Grenze von 1 x 10-7 für das Verzweigungsverhältnis von E4-und E2-(Kaskaden)-Zerfqll gefunden. Dies entspricht einem L=4 IIEnhancement ll G 4 < 9.0 s.p.u., während man aus den a-Teilchen-Streuexperimenten den Wert G 4 =(5.5 ± 0.8)s.p.u. gewinnt. In 140Ce konnte der 4~+ 0+ y-Obergang mit einer kollektiven Verstärkung von G4 =(11.8~0.7)s.p.u. beobachtet werden, in sehr guter übereinstimmung mit dem Wert G 4 = (13~,2) s.p.u. aus der a-Teilchenstreuung. Die Auswertung der Wirkungsquerschnitte für die a-Teilchenstreuung basiert auf einem speziellen Reaktionsmodell (Faltungsmodell). Die Resultate der direkten experimentellen Beobachtung des 4~+ 0+ Zerfalls sind ein empirischer Test auf die Modellabhängigkeit der Verfahren, mit denen L=4übergangsraten aus der a-Teilchenstreuung gewonnen werden. Zusammen mit einigen anderen ähnlichen Ergebnissen werden die Konsistenz der Methoden sowie die Evidenz und einige Implikationen der Hexadekapol-Bewegung in sphärischen Kernen kurz diskutiert.

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“…The shaded regions represent the transition rates measured by Coulomb excitation 13 -14 and inelastic scattering. 37,38 Transition rates have also been calculated from the deformation parameters obtained in a distorted-wave Born-approximation (DWBA) analysis of inelastic a particle scattering. 12 These results, as well as those obtained from the analysis of inelastic electron and a-particle scattering, are compared with the present work in Table IV.…”

Section: A Systematicsmentioning

confidence: 99%

Electromagnetic Transition Rates inNi58

Bertin¹,

Benczer‐Koller²,

Seaman³

et al. 1969

Phys. Rev.

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Lifetimes of 15 excited states in 58 Ni and one in 62 Ni have been measured using the Doppler-shift-attenuation method. The levels were excited via inelastic proton scattering at bombarding energies from 7 to 9 MeV. The Doppler shifts of decay 7 rays were measured in a 30-cm 3 Ge(Li) detector in coincidence with particles backscattered near 170°. Theoretical estimates of stopping powers were checked experimentally by Dopplershift-attenuation measurements; excellent agreement was found. The matrix elements extracted from the measured lifetimes are compared with shell-model and vibrational-model predictions. Agreement is, in general, poor. The theoretical analysis indicates that a state-dependent neutron effective charge must be taken into account, and that core excitations play an important role in the determination of transition probabilities.

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Electron-Scattering Study of Nuclear Levels in Cobalt, Nickel, Lead, and Bismuth

Cited by 155 publications

References 28 publications

Nuclear structure investigations in spherical heavy nuclei by means of inelastic electron scattering

Nuclear structure investigations in spherical heavy nuclei by means of inelastic electron scattering

Experimental studies of hexadecapole motion in spherical nuclei

Electromagnetic Transition Rates inNi58

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