Results 251 to 260 of about 207,308 (290)

Collective vibrations in a three-band superconductor

Theoretical and Mathematical Physics, 1993
Collective vibrations in a superconductor with three overlapping energy bands on the Fermi surface are investigated. It is shown that for certain relationships between the parameters of the theory there can, in addition to the acoustic branch, be two different branches of exciton type, which arise because of fluctuations of the phases of the order ...
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Collective bands in 106Ag and 107Ag

Nuclear Physics A, 1994
Abstract The nuclei 106 Ag and 107 Ag have been studied using 80 MeV 17 O ions impinging on 94 Zr. The γ- rays were detected with the NORDBALL array and light charged particles with a charged-particle detector system. Rotational bands have been established using γ-ray yields, γγ coincidences and angular correlation information.
Jerrestam, D., Klamra, W., Gizon, J., Liden, F., Hildingsson, L., Kownacki, J., Lindblad, T., Nyberg, J.   +7 more
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Band Agents: Addressing Collective Action Problems in Fragmented Spectrum Bands

SSRN Electronic Journal, 2014
Many spectrum bands are significantly fragmented, i.e. they are shared among many licensees and/or diverse service allocations that have equal rights. This poses a significant barrier to rearranging operating rights among band neighbors in ways that generate value for the parties and society at large.
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Band-structure-dependent collective states in simple metals

Physical Review B, 1989
Anisotropic structures in the inelastic-scattering cross section of x rays from single-crystal Li and of fast electrons from single-crystal Na and Al are found to arise from zone-boundary collective states (ZBCS) that, in contrast to the classical plasmon, depend strongly on the symmetry and on the strength of the crystal potential. We show that within
, Sturm, , Oliveira
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Ultrahigh-Q Metasurface Transparency Band Induced by Collective–Collective Coupling

Nano Letters
The metasurface analogue of electromagnetically induced transparency (EIT) provides a chip-scale platform for achieving light delay and storage, high Q factors, and greatly enhanced optical fields. However, the literature relies on the coupling between localized and localized or localized and collective resonances, limiting the Q factor and related ...
Xueqian Zhao, Rixing Huang, Xiang Du, Zhenrong Zhang, Guangyuan Li   +4 more
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Side bands in collective resonance fluorescence

Canadian Journal of Physics, 1985
The fluorescence spectrum of a system of strongly driven atoms, contained in a region that is small compared with the wavelength, is calculated using a screened interaction model. Coulomb dipole–dipole interaction is neglected, but a Markov approximation is not made.
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Collectivity of dipole bands in Pb196

1995
The lifetimes of states in two of the ΔI=1 bands in Pb196 have been measured using the Doppler shift attenuation method, and a new ΔI=1 band has been observed in this nucleus. States in the bands were populated in the reaction Er107(30Si,4n) at a beam energy of 142 MeV.
Reviol, W., Sferrazza, M., Garg, U., Carpenter, M.P., Nisius, D., Janssens, R.V.F., Ahmad, I., Bearden, I.G., Daly, P.J., Fornal, B., Drigert, M.W., Liang, Y., Lauritsen, T., Mayer, R.H., Grabowski, Z.W., Harrington, H.L., Henry, R.G., Moore, E.F., Khoo, T.L.   +18 more
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Collective bands in ^80,82Kr

Canadian Journal of Physics, 2007
Deformed shell-model calculations are performed to study the structure of the collective bands in 80,82Kr. In our microscopic model, the single particle orbits 1p3/2, 0f5/2, 1p1/2, and 0g9/2 constitute the configuration space with 56Ni as the inert core. A modified Kuo interaction for this basis space is used in our calculation.
S Mishra, K C Tripathy, R Sahu
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Collective bands in even mass Sn isotopes

Nuclear Physics A, 1979
Abstract Positive parity bands in 112, 114, 116, 118Sn have been excited up to levels with spin and parity Jπ = 12+ using Cd(α, 2nγ)Sn reactions. The experiments consisted of γ-ray excitation function, γ-γ coincidence, lifetime, γ-ray angular distribution, γ-ray linear polarization and conversion electron measurements.
J. Bron, W.H.A. Hesselink, A. Van Poelgeest, J.J.A. Zalmstra, M.J. Uitzinger, H. Verheul, K. Heyde, M. Waroquier, H. Vincx, P. Van Isacker   +9 more
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Collective oblate dipole rotational bands in 198Pb

Nuclear Physics A, 1993
Abstract The nucleus 198 Pb was populated via the 186 W( 17 O, 5n) 198 Pb reaction at beam energies of 92 and 98 MeV. Five collective rotational cascades of ΔI = 1 transitions have been found. Four are highly regular, one much more irregular. The structures are incorporated into a level scheme which extends up to approximately spin 32ħ and an ...
Clark, R.M., Wadsworth, R., Paul, E.S., Beausang, C.W., Ali, I., Astier, A., Cullen, D.M., Dagnall, P.J., Fallon, P., Joyce, M.J., Meyer, M., Redon, N., Regan, P.H., Sharpey-Schafer, J.F., Nazarewicz, W., Wyss, R.   +15 more
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