Results 221 to 230 of about 30,007 (261)

A new electric quadrupole transition in O16

Physics Letters, 1962
Strong enhancement of single-nucleon matrix elements for E2 transitions in nuclei neighboring O/sup 16/ result from the virtual excitation of a collective 2/sup +/ state in the O/sup 16/ core (S. Fallieros and R. A. Ferrell, Phys. Rev., 116: 660 (1959)).
G.R. Bishop, D.B. Isabelle
openaire   +1 more source

Collision-induced dipole transitions and collisional broadening of quadrupole transitions

Physical Review A, 1981
Collision-induced dipole transitions and collisional broadening in the wing of $\mathrm{Cs}(5D)$ due to mixing with $\mathrm{Cs}(7S)$ and $\mathrm{Cs}(6P)$ are studied using two-photon resonance ionization spectroscopy. From the structure of the line shape, we measured the van der Waals well of the ground state without performing a temperature study or
Munir H. Nayfeh, W. Glab, A. McCown
openaire   +1 more source

Quadrupole transitions at very small momentum transfer in nuclei

Physical Review C, 1988
The giant quadrupole resonance and the low-lying quadrupole transition have been investigated in /sup 58/Ni, /sup 92/Mo, /sup 120,124/Sn, /sup 140/Ce, and /sup 208/Pb by inelastic scattering of 108.5 MeV /sup 3/He particles at very small angles. Anomalous rise of the giant quadrupole resonance cross section is observed to 0/sup 0/.
Buenerd, M., Bouhelal, K., Martin, P., Chauvin, J., Lebrun, D., Perrin, G., de Saintignon, P., Duhamel, G.   +7 more
openaire   +3 more sources

Electric quadrupole transitions in neutral Li

Journal of Quantitative Spectroscopy and Radiative Transfer, 1975
Abstract Eigenfunctions of an effective potential for the valence electron in neutral Li are used to compute electric quadrupole oscillator strengths and transition probabilities for a large number of bound-bound transitions and a few bound-free transitions.
openaire   +1 more source

Master equation for electric quadrupole transitions

Journal of Physics B: Atomic, Molecular and Optical Physics, 1989
A master equation is developed, analogous to the Lehmberg-Agarwal equation, for the study of electric quadrupole transitions in atomic systems. This equation allows one to study the evolution in time of a system of atoms interacting with and via the radiation field in terms of the average values of atomic operators only.
openaire   +1 more source

RADIAL MATRIX ELEMENT FOR THE QUADRUPOLE TRANSITION WITH THE MORSE POTENTIAL

Canadian Journal of Physics, 1952
A general formula for the radial part of the matrix element for the quadrupole transition with the Morse potential is derived using standard methods of analysis. The same methods can also be used to derive an expression for the radial part of the dipole transition matrix element.
openaire   +2 more sources

Transition quadrupole moments of superdeformed states in194Pb

Zeitschrift f�r Physik A Hadrons and Nuclei, 1992
Lifetimes of superdeformed states in194Pb were measured by the Doppler-shift attenuation method. Quadrupole moments around 20 eb, that are constant over the observed frequency range, are derived. The results rule out large centrifugal stretching effects.
Willsau, P., Hubel, H., Korten, W., Azaiez, F., Deleplanque, M.A., Diamond, R.M., Macchiavelli, A.O., Stephens, F.S., Kluge, H., Hannachi, F., Bacelar, J.C., Becker, J.A., Brinkman, M.J., Henry, E.A., Kuhnert, A., Wang, T.F., Draper, J.A., Rubel, E.   +17 more
openaire   +1 more source

Metamagnetic transition based on the quadrupole moment in PrCu2

Physica B: Condensed Matter, 1996
Abstract The metamagnetic transition of PrCu 2 brings about the crystal distortion based on the magnetoelastic effect. We have studied in detail this transition through the magnetostriction, magnetoresistance and magnetization measurements.
R Settai, P Ahmet, M Abliz, K Sugiyama, Y Ōnuki, K Kindo, S Takayanagi   +6 more
openaire   +1 more source

QUADRUPOLE STRENGTH IN THE N→Δ TRANSITION

2001
The possibility of nucleon deformation raised more than 20 years ago 1 still remains an open one. The presence of resonant quadrupole amplitudes in the transition to the only isolated excited state of the nucleon is regarded as the definitive signature of deviation from the simplistic spherical models of the nucleon and/or the delta.
openaire   +1 more source

Transition quadrupole moments in the superdeformed band of 40Ca

2003
The transition quadrupole moments Qt for the superdeformed band in 40Ca have been determined through thin-target Doppler-shift attenuation analyses. A best-fit value of Qt = 1.30 ± 0.05 e b is obtained when a single value is assumed for the entire band.
Macchiavelli, A.O., Görgen, A., Chiara, C.J., Carpenter, M.P., Baktash, C., Ryu, S.K., Lerma, F., Ideguchi, E., Seweryniak, D., Rudolph, D., Lister, C.J., Reviol, W., LaFosse, D.R., Fallon, P., Reiter, P., Lauritsen, T., Janssens, R.V.F., Galindo-Uribarri, A., Sarantites, D.G., Devlin, M.   +19 more
openaire   +1 more source