Results 111 to 120 of about 29,850 (166)

Exploring Ortho-Para Hydrogen Conversion Catalysts Based on Surface Electric Field Gradient. [PDF]

J Phys Chem Lett
Mizoguchi H, Shirako Y, Shoji S, Abe H, Fujita T, Hosono H.   +5 more
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Strong exciton coupling: a practical toolbox for computing interaction energies, wavefunctions, and optical spectra.

Chem Soc Rev
Ringström R, Hashemi SR, Liang Y, Hestand NJ, Börjesson K.   +4 more
europepmc   +1 more source

Ground-state orbital angular momentum lasing from liquid crystal torons embedded in a microcavity. [PDF]

Sci Adv
Muszyński M, Bobylev D, Kapuściński P, Oliwa P, Mędrzycka J, Oton E, Mazur R, Morawiak P, Piecek W, Kula P, Solnyshkov D, Malpuech G, Szczytko J.   +12 more
europepmc   +1 more source

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Quadrupole transitions revealed by Borrmann spectroscopy

Nature, 2008
The Borrmann effect-a dramatic increase in transparency to X-ray beams-is observed when X-rays satisfying Bragg's law diffract through a perfect crystal. The minimization of absorption seen in the Borrmann effect has been explained by noting that the electric field of the X-ray beam approaches zero amplitude at the crystal planes, thus avoiding the ...
Robert F, Pettifer, Stephen P, Collins, David, Laundy   +2 more
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Quenching of spin-flip quadrupole transitions

Physical Review C, 1985
An increasing amount of experimental data indicates that spin-flip quadrupole transitions exhibit quenching effects similar to those reported earlier in (p,n) reactions involving l = 0 and l = 1 transitions. We present here two model calculations suggesting that the E2 spin-flip transitions are more affected than their M1 and M3 counterparts by the ...
, Castel, , Blunden, , Okuhara
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Electric quadrupole transitions

Canadian Journal of Physics, 1991
A data set has been compiled consisting of 101 E2 strengths observed in neutron radiative capture. The E2 strength function is found to be consistent with a fifth power energy dependence and mass dependence characterized by a power of n = 1.87 ± 0.07.
W. V. Prestwich, M. A. Islam, T. J. Kennett   +2 more
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Transitional quadrupole moments in83Y

Zeitschrift f�r Physik A Hadrons and Nuclei, 1994
Doppler shift attenuation lifetime measurements have been carried out for the 3qp and isomeric rotational bands in Y-83 using the reaction (Ni(Si,3p))-Ni-58-Si-28. While the transitional quadrupole moments in the 3qp bands are slightly lower than in the 1 qp bands, we found evidence for a strong reduction in \Q(t)\ for the isomeric band.
T. D. Johnson, F. Cristancho, C. J. Gross, M. Kabadiyski, K. P. Lieb, D. Rudolph, M. Weiszflog, T. Burkardt, J. Eberth, S. Skoda   +9 more
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Superallowed electric-quadrupole transitions of ions in crystals

Physical Review Letters, 1989
La reponse collective a plusieurs electrons d'un cristal hote au champ electrique d'un photon peut augmenter la force d'oscillateur pour une transition quadripolaire de l'ion.
, Lacueva, , Overhauser
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Electric quadrupole transitions in 42Ca

Nuclear Physics A, 1969
Abstract From Doppler shift attenuation and delayed coincidence measurements, lifetimes have been determined for states in 42 Ca as follows: The measured electric quadrupole transitions were compared with the predictions of the shell model, the weak-coupling model and the Gerace-Green calculations.
R. Hartmann, K.P. Lieb, H. Röpke
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Sum rules for electric quadrupole transitions

Proceedings of the Royal Society of London. A. Mathematical and Physical Sciences, 1974
Abstract Sum rules for matrix elements occurring in calculations of electric quadrupole radiation have been derived and tested for the helium and sodium isoelectronic sequences, using frozencore atomic wavefunctions. Electric quadrupole polarizabilities have been calculated for the metastable 2 1S and 2 3S states of He, Li+, Be2+ and ...
D. Rosenthal, R. P. McEachran, M. Cohen
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