The Institute of Physics ( IOP ) по журналам "Journal of Physics B: Atomic, Molecular and Optical Physics"
Отображаемые элементы 120 из 6897

(19950614)A 15state Rmatrix calculation has been carried out at 530 energies ranging from the n=2 threshold up to the n=5 threshold at 13.06 eV to map out the resonant profiles for the 1s2p integral and differential excitation ...

(19931014)The study of 1/n expansions for various atomic matrix elements, where n is the principal quantum number, plays an important role in the theoretical foundations of the quantum defect method. The paper develops an expansion ...

(19930828)The authors explore the effects of different plasma parameters on the Lilike 1s2l2l'1s22l line emission feature. At very high density (Ne>1023 cm3 for Al), the broadening is important and 1s2l2l' level populations have ...

(19930928)The authors carried out the variational configuration interaction calculation to obtain the energies for n1S series in He for n=716, and for n3S series in He for n=1418 with Bspline basis functions. As found in their ...

(19901114)The relative triple differential cross section for electron impact ionization of helium has been measured in the coplanar symmetric geometry at an impact energy of 200 eV. A deep minimum near Theta =85' is at least a factor ...

(19950928)The 29state Rmatrix calculations in which physical target states of helium with n=1, 2, 3, 4 and 5 are included in the total scattering wavefunctions have been reported for the 11S33P differential cross sections at ...

(19980428)Angular distributions of the two ejected electrons following photodouble ionization have been measured for molecular and He with . The results were obtained at the Daresbury Synchrotron Radiation Source using a multicoincidence ...

(20001114)Several model functions capable of representing the symmetrized transition amplitudes within the parametrization formalism of Huetz et al for the photodouble ionization of helium are proposed. The model is based on the ...

(19960614)We present highly accurate relative measurements of 2 excitation of helium by electron impact at 30, 40 and 50 eV. These, when normalized to the convergent closecoupling (CCC) theory at one angle, yield excellent agreement ...

(19940814)The soft Xray photoabsorption and total photoion yield spectra of atomic Cu have been determined in the range of the Ledges. At the L2 and L3 thresholds there are clearly visible jumps in the absorption cross section. ...

(19921128)The present most sophisticated calculations for 2p photoionization in magnesium (RRPA and MBPT) still neglect important initial and final ionic state configuration interactions whose net effect can be described approximately ...

(19950514)The 2psubshell photoabsorption spectrum of Mglike silicon has been recorded for the first time using the dual laser plasma (DLP) technique. The spectrum is discussed within a framework of the evolution of 2p photoabsorption ...

(19960714)The results of manybody calculations of the 2s, 2p photodetachment cross section are presented. Manyelectron correlations, in particular the polarization interaction between a photoelectron and atomic core electrons in ...

(19910928)It is commonly believed that an atomic system with a 2s electron gives a lower energy than that of a system with a 2p electron. The author shows that in a doublycoreexcited fourelectron system, the energy of the 2s22p23P ...

(19880314)The closecoupling method is used to compute the 2s photoionisation cross section in the length formulation. It is shown that the 3s to 3p excitation induced by the ejected electron cannot be ignored. This process decreases ...

(19890128)The 2s photoionisation cross section (length formulation) is evaluated using the UCL codes. These codes describe the Na initial and (Na++e) final states through a closecoupling expansion. The 3s to 3d shakeup process ...

(19970428)Cross sections of single and shakeup photoionization from the subvalence s subshell of sodium and potassium atoms are calculated. The relaxedorbital multiconfiguration and singleconfiguration Hartree  Fock approaches ...

(19940628)The even parity J=02 autoionizing spectra of calcium are investigated below the 3d threshold by a twostep laser excitation from the 3d4s metastables through the 3d4p 3P0.1.2 intermediate states. The 3d4s are populated ...

(19980314)The 3d photoabsorption spectra of Cu Ilike Zn II, Ga III and Ge IV have been recorded in the 25100 eV region using the dual laser plasma technique. The spectra are dominated by transitions of the type which have been ...

(19980228)The 3d photoabsorption spectra of Ni Ilike Zn III and Ge V have been recorded in the 30  100 eV region using the duallaser plasma (DLP) technique. The spectrum of is found to contain , transitions, while in , transitions ...
Отображаемые элементы 120 из 6897