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61.
P. W. Gallagher E. W. Schneider W. B. Walters 《Zeitschrift für Physik A Hadrons and Nuclei》1980,296(1):81-85
The half-life of the 1/2? isomer in89Mo has been determined in an experiment where an enriched92Mo target was irradiated by 350 or 700 ms bursts of 60 MeV protons. Analysis of the gamma-ray spectra collected as a function of time between irradiations revealed gamma rays at 118.8 and 268.5 keV decaying with a 190±15 ms half-life. The hindrance ofE3 transitions inN=47 andZ=47 nuclides is discussed. 相似文献
62.
63.
64.
A new synthesis of nitrones is described. This involves the Ag(I)-catalysed cyclisation of allenic oximes, the resulting nitrones being trapped by various 1,3-dipolarophiles. 相似文献
65.
Patrick X. Gallagher 《Mathematische Zeitschrift》1967,102(3):236-237
66.
P. X. Gallagher 《Inventiones Mathematicae》1970,11(4):329-339
67.
I.Ralph C. Bick Mohammad A. Hai Nigel W. Preston Rex T. Gallagher 《Tetrahedron letters》1980,21(6):545-546
Aristotelinone and serratoline, two new Aristotelia alkaloids, are shown to have indole and indolenine structures respectively from their spectra and reduction products. 相似文献
68.
Small amounts of crystallinity may be present in “amorphous” alloy specimens in the form of “cast-in” crystallites or partially crystallized surfaces. in this paper the possible effects of such low-level crystallinity upon the measured electrical transport properties are considered. It is found that the observed ageing effects in the transport properties of a number of amorphous alloys may be explained as due to surface crystallization driven by selective oxidation. It is further argued that for the ferromagnetic Metglasses cast-in crystallites could have a significant effect particularly upon the thermopower, and that this is probably part of the explanation of the observed discrepancies between the different measured values. It is shown that even very small levels of crystallinity can have significant effects upon the measured transport properties and the many disagreements to be found in the published values are discussed in the light of this. 相似文献
69.
Edmonds KW van der Laan G Freeman AA Farley NR Johal TK Campion RP Foxon CT Gallagher BL Arenholz E 《Physical review letters》2006,96(11):117207
Remarkably anisotropic Mn L2,3 x-ray magnetic circular dichroism spectra from the ferromagnetic semiconductor (Ga,Mn)As are reported. States with cubic and uniaxial symmetry are distinguished by careful analysis of the angle dependence of the spectra. The multiplet structures with cubic symmetry are qualitatively reproduced by calculations for an atomiclike d5 configuration in tetrahedral environment, and show zero anisotropy in the orbital and spin moments within the experimental uncertainty. However, hybridization with the host valence bands is reflected by the presence of a preedge feature with a uniaxial anisotropy and a marked dependence on the hole density. 相似文献
70.
Mašek J Máca F Kudrnovský J Makarovsky O Eaves L Campion RP Edmonds KW Rushforth AW Foxon CT Gallagher BL Novák V Sinova J Jungwirth T 《Physical review letters》2010,105(22):227202
We analyze microscopically the valence and impurity band models of ferromagnetic (Ga,Mn)As. We find that the tight-binding Anderson approach with conventional parametrization and the full potential local-density approximation+U calculations give a very similar band structure whose microscopic spectral character is consistent with the physical premise of the k·p kinetic-exchange model. On the other hand, the various models with a band structure comprising an impurity band detached from the valence band assume mutually incompatible microscopic spectral character. By adapting the tight-binding Anderson calculations individually to each of the impurity band pictures in the single Mn impurity limit and then by exploring the entire doping range, we find that a detached impurity band does not persist in any of these models in ferromagnetic (Ga,Mn)As. 相似文献