Navegação Ciências Exatas e da Terra por Autor "Rogers, John David"
Resultados 1-6 de 6
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Influence of combined static and time-dependent quadrupole interactions on angular correlation in nuclei with integral spin
Andrade, Pedro da Rocha; Rogers, John David (1971) [Artigo de periódico]The application of the Bloch-Wangsness-Redfield theory of nuclear relaxation to the study of perturbed angular correlations in even-A nuclei subject to simultaneous static and timedependent quadrupole interactions bas been ... -
Influence of simultaneous static and time dependent quadrupole interactions on gamma-gamma angular correlations
Andrade, Pedro da Rocha; Rogers, John David; Vasquez, Adalberto (1969) [Artigo de periódico]We derive the forro of the perturbation factors for the angular correlation of two successive Y rays when the intermediate state is under the influence of an axially symmetric static electric field gradient plus a small ... -
Nuclear-quadrupole interactions in perovskite-type compounds of hf/sup 181/ studied by the perturbed-angular-correlation technique
Andrade, Pedro da Rocha; Forker, Manfred; Rogers, John David; Kunzler, Julio Vitor (1972) [Artigo de periódico]Measurements of nuclear-quadrupole-interaction constants in perovskite-type compounds of PbHf03, SnHf03, CaHf03, and SrHf03 have been performed using the perturbed-angularcorrelation technique. A range of fundamental ... -
Nuclear relaxation in (nh/sub 4/)/sub 3/hff/sub 7/ studied by gamma-gamma angular correlation
Andrade, Pedro da Rocha; Vasquez, Adalberto; Rogers, John David; Fraga, Euclydes Francisco da Rocha (1970) [Artigo de periódico]Measurements of the perturbed angular correlation have been made for the first 5/2+ excited statc of Ta181 in (NH4) 3HfF7 in arder to solve a controversial question related to the structure of the complex Hf7 this compound. ... -
Studies of quadrupole interactions by means of angular correlations
Andrade, Pedro da Rocha; Maciel, Alice; Rogers, John David (1967) [Artigo de periódico]Measurements of the nuclear quadrupole interaction have been made for the first 5/2+ excited state of Ta181 in severa! compounds of Hf, and for the first 5/2+ excited state of Cdll1 in In metal by time-differential and by ... -
Study of the hyperfine magnetic field acting on /sup 181/ta nuclei in ni matrix
Livi, Flavio Pohlmann; Livi, Rogerio Pohlmann; Rogers, John David; Zawislak, Fernando Claudio (1973) [Artigo de periódico]Hyperfine interactions for Ta impurities in a polycrystalline nickel matrix produced by quenching from the melt have been studied using the perturbed-angular-correlation technique. An effective hyperfine field of -89.8 ± ...