A perturbed angular distribution in 70Ga

Hutcheon, D. A.; Sheppard, D.M.; Kitching, P.; Davidson, J. M.; Luursema, C.W.; Carlson, Linda E.

doi:10.1016/0375-9474(75)90179-7

Cited by 12 publications

(2 citation statements)

References 6 publications

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“…The isomerism of the J' = 4-state at 879 keV was uncovered by the same group, i.e. L. E. Carlson et al [9] who also measured lifetimes by DSAM [10], and the time perturbed angular distribution (TPAD) of the 188 keV y-ray was studied by D. A. Hutcheon et al [11].…”

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confidence: 96%

High spin levels in 70Ga via 68Zn(α, pnγ) 70Ga

et al. 1977

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The 70Ga nucleus has been investigated via the 68Zn(α, pnγ)70Ga reaction at Eα = 23-40 MeV. The level scheme has been established by means of relative yield functions, electronic timing measurements, prompt and delayed coincidences and angular distributions of the emitted γ rays. The assignations of spins up to 9+ to levels up to 2.9 MeV excitation energy specify the components of the (νlg9/2) subshell

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confidence: 96%

High spin levels in 70Ga via 68Zn(α, pnγ) 70Ga

et al. 1977

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“…O estado de mais alto spin obtido possui energia medida igual a 2886,3 (11) keV e spin suposto igual a 9. Este núcleo também possui um estado isomérico de energia igual a 879,1 (1) keV e meia vida igual a T 1/2 = 22,7 (5) ns (HUTCHEON, 1975).…”

Section: -Estudos Anteriores Dos Núcleos 64666870 Ga E 67 Geunclassified

Sistemática de núcleos ímpar-ímpar de Ga na região de massa A=60 - 70

Allegro¹

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Um dos modelos mais utilizados para a descrição de núcleos é o Modelo de Camadas em Larga Escala, que demonstrou grande acurácia na descrição detalhada de propriedades nucleares. Na região de massa A = 50-80, os orbitais 1g 9/2 e 2d 5/2 são fundamentais para a descrição de estados excitados com mudança de paridade e de estruturas deformadas, porém suas contribuições na descrição de estados excitados de núcleos com número de massa ímpar e núcleos duplamente ímpares perto da linha de estabilidade ainda estão por ser investigadas. Nesta tese, a importância dos orbitais 1g 9/2 e 2d 5/2 na formação dos estados excitados dos núcleos duplamente ímpares 64,66,68,70 Ga é estudada sistematicamente, levando também em consideração a descrição dos isótopos de Zn, Ge e Ga com número de massa ímpar pelo Modelo de Camadas em Larga Escala. Propriedades dos estados excitados, como energia e vidas médias de alguns estados isoméricos, foram medidas experimentalmente para os isótopos

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Electric Quadrupole Interaction in Noncubic Metals

Witthuhn¹,

Engel²

1983

Topics in Current Physics

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With 39 FiguresThe knowledge of the charge distribution is of basic importance for the detailed understanding of the properties of a solid. In noncubic solids this charge distribution creates an electric field gradient (EFG). The quadrupole hyperfine interaction (QI) between the nuclear quadrupole moment Q and the EFG at the site of the nucleus results in an energy-splitting of the nuclear levels. The investigation of this QI in noncubic metals and alloys can be carried out by a variety of experimental techniques. The application of the perturbed angular correlation methods has been especially fruitful in this field. Its advantages, essential for QI studies in metals, are the ease with which temperature and pressure dependencies can be measured and the applicability to pure metals as well as to systems with extremely diluted impurity probe atoms. Thus, most experimental data have been obtained by this technique during the last few years.The first experiments on the EFG in metals were reported more than two decades ago [S. I-3]. The interest in this field increased drastically after the pioneering work of RAGHAVAN [S.4] who demonstrated the perturbed angular correlation technique to be extremely powerful in this field. The experimental data collected within the following years revealed two remarkable systematic trends: the first is related to the temperature dependence of the quadrupole interaction. It was discovered at Erlangen [S. S,6] that in most cases this temperature variation follows fairly accurately a simple T 3 / 2 relation. This behaviour is found in pure metals as well as in dilute binary alloys and in many cases it holds over the entire temperature range up to the melting pOint.The second important systematics is the correlation between the ionic and the electronic field gradients [S.7,8]. This empirical result was highly unexpected in terms of the conventional ansatz of the EFG based on two independent sources, one from the lattice and the other from the conduction electrons. The "universal correlation" rather implies-besides the dependence on the geometrical array of the lattice atoms -a strong relation of the electronic gradient to the nonsphericity of the probe ion cores, which is described by the Sternheimer anti shielding factor.Stimulated by these recent experimental trends emerging from the large body of available experimental data, significant progress in the theoretical approaches can be recognized. But we are still not able to predict reliable quantitative numbers

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A perturbed angular distribution in 70Ga

Cited by 12 publications

References 6 publications

High spin levels in 70Ga via 68Zn(α, pnγ) 70Ga

High spin levels in 70Ga via 68Zn(α, pnγ) 70Ga

Sistemática de núcleos ímpar-ímpar de Ga na região de massa A=60 - 70

Electric Quadrupole Interaction in Noncubic Metals

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