Magnitude of static and dynamic polarizabilities of doubly excited states of negative ions: Application to the second bound state ofH−

Abstract

A many-electron, many-photon theory has been applied to the computation of static cx and dynamic a(~) linear polarizability of the H 2p 'P state. The calculation involves the nonperturbative mixing of one bound (2p 'P), and one autoionizing (2s2p 'P') state with 13 continua. State-specific, compact, and accurate square-integrable wave functions have been employed. The magnitude of the polarizability is huge: a=64000 a.u.

Dynamic scalar and tensor polarizabilities of the 21Pand 23Rérat1, Pouchan2 1994Phys. Rev. A24150View full textAdd to dashboardCite

“…These studies concern essentially the metastable or resonant states of a twoor three-electron system such as 2 S and 2 S states of He [10 -13] and Li+ [11,12], 2 4P states of He and Li [14), and the 2 P doubly excited state of the prototype negative ion H [15). Generally, when the excited states are the lowest low-lying states, the values of dynamic polarizabilities for real pulsations u are positive and increase until the first resonance [10 -14].…”

“…Generally, when the excited states are the lowest low-lying states, the values of dynamic polarizabilities for real pulsations u are positive and increase until the first resonance [10 -14]. When a resonant (2 P and 3 P states of He) [9,16] or a second bound state (2 sP state of H ) [15] is concerned, the behavior of the dynamic polarizabilities may be difFerent.…”

Many‐Electron, many‐photon theory of nonstationary states

“…Its expansion in a Taylor series with terms averaged over a field cycle produces averaged frequency-dependent linear and nonlinear polarizabilities, in analogy with the static case. Thus, for the interaction of a ground or an excited atomic level with linearly polarized light of single-frequency [24,25] -(Y(w)--F --y(w)-F4 --S(w) (24) can also be used for computation of intensities for the phenomenon of above-threshold ionization (Am). In fact, in [26], the effects on ATI of the application of a dc field parallel to the linearly polarized ac field was studied, revealing an increase of the nonlinear aspects of the phenomenon.…”

Polarizability of negatively charged helium‐like ions interacting with Coulomb and screened Coulomb potentials

“…The study of atomic and ionic polarizabilities (both static and dynamic) plays important role in a number of applications in physical sciences. Several studies have been performed so far to estimate static and dynamic polarizabilities of helium atom and helium‐like positive ions; and for two‐electron negative ions, there are only a few theoretical studies have been performed . The static dipole polarizabilities (SDP) of ∞ H – , 1 H – , and Ps – are reported by Kar and Ho …”

“…Several studies have been performed so far to estimate static and dynamic polarizabilities of helium atom [3][4][5][6][14][15][16][17][18][19][20][21][22][23][24] and helium-like positive ions; [6,12,[24][25][26][27][28] and for two-electron negative ions, there are only a few theoretical studies have been performed. [2,13,21,[29][30][31] The static dipole polarizabilities (SDP) of 1 H -, 1 H -, and Psare reported by Kar and Ho. [29] The multipole static polarizability of 1 His also reported by Kar and Ho.…”