Zobrazeno 1 - 10
of 64
pro vyhledávání: '"K Aashamar"'
Publikováno v:
Physical Review A. 53:168-177
A minimax formulation for the time-independent Dirac equation is extended to the two-particle problem. The question of solutions of the minimax formulation is discussed and related to the continuum dissolution problem. The approach is applied to the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::896db9298db1e542fa13d592fd11d065
https://doi.org/10.1103/physreva.53.168
https://doi.org/10.1103/physreva.53.168
Autor:
T M Luke, K Aashamar
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 27:1091-1103
Transition rates have been calculated for all electric dipole allowed decays for Cr II of the 3d44p levels arising from the closely spaced 6Po, 6Do and 4Po terms, to all lower levels that arise from the 6S, 6D, 4P, and 4D terms of the 3d5 and 3d44s c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::03ea8ea3788c442d27aa614ab8de190e
https://doi.org/10.1088/0953-4075/27/6/009
https://doi.org/10.1088/0953-4075/27/6/009
Autor:
T M Luke, K Aashamar
Publikováno v:
Physica Scripta. 49:280-285
Configuration interaction calculations have been carried out to obtain rates for electric dipole transitions and lifetimes for the 1s22s22p63s2 3p63d44d and 5s6D and 4d6F levels in Cr II. Up to 40 configurations have been included so correlation effe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::22fa16fcc4460868abb95e10437dec47
https://doi.org/10.1088/0031-8949/49/3/005
https://doi.org/10.1088/0031-8949/49/3/005
Autor:
K Aashamar, J O Andersen
Publikováno v:
Physica Scripta. 47:160-168
We have calculated energies and transition rates for the 2s22p3 4S° ground state and a number of excited states in the isoelectronic sequence of atomic nitrogen using the multiconfiguration optimized potential model (MCOPM). The excited states inclu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d02d7dabfb8ba682376ec99f9b0a4ae
https://doi.org/10.1088/0031-8949/47/2/005
https://doi.org/10.1088/0031-8949/47/2/005
Autor:
T M Luke, K Aashamar
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 23:L733-L738
Structure and oscillator strength calculations are performed for the Cr II ion in intermediate coupling. Certain important correlation configurations contribute large numbers of levels which makes the problem very demanding in computing resources. A
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::849a2402cdae5f011fd6a245f88abb6d
https://doi.org/10.1088/0953-4075/23/22/001
https://doi.org/10.1088/0953-4075/23/22/001
Autor:
Morten Hjorth-Jensen, K Aashamar
Publikováno v:
Physica Scripta. 42:309-316
We have calculated oscillator strengths in the length and velocity formulation for a large number of transitions in the Aluminum isoelectronic sequence from Si II through K VII, using the Multiconfiguration Optimized Potential Model. The results have
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58a9a9d1fa68ebe998c2cbca3e680bc5
https://doi.org/10.1088/0031-8949/42/3/009
https://doi.org/10.1088/0031-8949/42/3/009
Publikováno v:
Physica Scripta. 42:145-149
Oscillator strengths for transitions among sextet terms of the configurations 3d5, 3d44s, 3d44p, 3d44d and 3d45s of singly ionized Chromium have been calculated. Transition wavelengths lie in the range 2050-3100 A. The calculations have been performe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fecd78c0edf20dc69d86bdc9e03932fb
https://doi.org/10.1088/0031-8949/42/2/005
https://doi.org/10.1088/0031-8949/42/2/005
Publikováno v:
Physica Scripta. 37:13-26
Oscillator strengths for downward transitions from the 3s4p and 3s4s levels in the Magnesium isoelectronic sequence are reported. These, as well as lifetimes for these levels, have been calculated for MgI to MnXIV using the Multiconfiguration Optimiz
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::af9007fb392e11f969993286e9858276
https://doi.org/10.1088/0031-8949/37/1/002
https://doi.org/10.1088/0031-8949/37/1/002
Publikováno v:
Physica Scripta. 30:121-134
The structures of the 3s23p 2P0 ground state and of a number of excited states for aluminum and ions along the isoelectronic sequence up to Ca VIII have been calculated in the Multiconfiguration Optimized Potential Model. The excited states include t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2d216795fe68e9b5b6ed426a6675773b
https://doi.org/10.1088/0031-8949/30/2/006
https://doi.org/10.1088/0031-8949/30/2/006
Autor:
K Aashamar, P A Amundsen
Publikováno v:
Journal of Physics B: Atomic, Molecular and Optical Physics. 21:2709-2724
The authors derive expressions for the path factors for arbitrary multipole transitions for a Rutherford trajectory in the semiclassical approximation for atomic ionisation. The usefulness of the method is illustrated by calculating L-subshell ionisa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::894a7527aed18ac5616f613a26ca80e6
https://doi.org/10.1088/0953-4075/21/15/016
https://doi.org/10.1088/0953-4075/21/15/016