Modern trends in the spectroscopy of multicharged ions

Ivanov, L. N.; Evanova, E.P.; Aglitsky, E.V.

doi:10.1016/0370-1573(88)90010-5

Cited by 97 publications

(124 citation statements)

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“…We apply a generalized energy approach [11][12][13][14][15] and relativistic perturbation theory with the MP zeroth approximation [16][17][18][19][20] to computing the Rydberg atoms ionization parameters. In relativistic theory radiation decay probability (ionization cross-section etc) is connected with the imaginary part of electron energy shift.…”

Section: Ionization Of the Rydberg Atoms In The Blackbody Radiationmentioning

confidence: 99%

“…Note that the correct treatment of the heavy Rydberg atoms parameters in an external electromagnetic field requires using strictly relativistic models. Here we apply an energy approach [11][12][13][14][15] with the MP zeroth approximation [16][17][18][19][20] to computing the thermal BBR ionization characteristics of the Rydberg atoms, in particular, the sodium.…”

Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Spectroscopy of Rydberg atoms in a Black-body radiation field: Relativistic theory of excitation and ionization

Свинаренко

Khetselius

Buyadzhi

et al. 2014

J. Phys.: Conf. Ser.

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IntroductionA great progress in experimental laser physics and appearance of the so called tunable lasers allows one to access the highly excited Rydberg states of atoms. In fact this is a beginning of a new epoch in the atomic physics with external electromagnetic field. It has stimulated a great number of papers on the ac and dc Stark effect [1][2][3][4][5][6][7][8][9][10][11][12]. Conversely, the experiments with Rydberg atoms had very soon resulted in the discovery of an important ionization mechanism, provided by unique features of the Rydberg atoms. Relatively new topic of the modern theory is connected with consistent treating the Rydberg atoms in a field of the Blackbody radiation (BBR). It should be noted that the BBR is one of the essential factors affecting the Rydberg states in atoms [1]. The account for the ac Stark shift, fast redistribution of the levels' population and photoionization provided by the environmental BBR became of a great importance for successfully handling atoms in their Rydberg states.The most popular theoretical approaches to computing ionization parameters of the Rydberg atom in the BBR are based on the different versions of the model potential (MP) method, quasiclassical models. We mention a simple approximation for the rate of thermal ionization of Rydberg atoms, based on the results of our systematic calculations in the Simons-Fues MP [1]. In fact, using the MP approach is very close to the quantum defect method and other semi-empirical methods, which were also widely used in the past few years for calculating atom-field interaction amplitudes in the lowest orders of the perturbation theory. The significant advantage of the Simons-Fues MP method in comparison with other models is the possibility of presenting analytically (in terms of the hypergeometric functions) the characteristics for arbitrarily high orders, related to both bound-bound and bound-free transitions. Naturally, the standard methods of the theoretical atomic physics, including the Hartree-Fock and Dirac-Fock approximations, should be used in order to determine the thermal ionization characteristics of neutral and Rydberg atoms [2]. Note that the correct treatment of the heavy Rydberg atoms parameters in an external electromagnetic field requires using strictly relativistic models. Here we apply an energy approach [11][12][13][14][15] and relativistic perturbation theory (PT)

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Section: Ionization Of the Rydberg Atoms In The Blackbody Radiationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spectroscopy of Rydberg atoms in a Black-body radiation field: Relativistic theory of excitation and ionization

Свинаренко

Khetselius

Buyadzhi

et al. 2014

J. Phys.: Conf. Ser.

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“…The properties of laser-produced hot and dense plasmas, known as laser plasma, have drawn considerable attention ove the last two decades through the recent laser-fusion studies [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Similar interest is also stimulated by importance of this information for correct determination of the characteristics for plasma in thermonuclear (tokamak) reactors, searching new mediums for X-ray range lasers.…”

mentioning

confidence: 99%

“…Usually the experimental one-quasi-particle energies are used for determination of parameters of the model potential (c.f. [8][9][10]15,16]). …”

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confidence: 99%

SENSING THE OPTIMAL PLASMA PARAMETERS FOR X-RAY LASING: CALCULATION OF ELECTRON-COLLISION STRENGTHS FOR Ar-LIKE PLASMA

Глушков

Gurnitskaya

Korchevsky

et al. 2014

SEMST

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A new high-accuracy theoretical spectroscopy scheme is used for sensing the laser plasma parameters. Within the uniform energy approach, it is carried out debye shileding approach calculation of cross-sections of electron-collisional excitation for ions of Ba in Ar-plasma.Key words: sensing plasma parameters, debye shileding approach, electron-collisional excitation cross-section Íîâà òåîðåòè÷íà ñõåìà âèêîðèñòàíà ó çàäà÷³ äåòåêòóâàííÿ ïàðàìåòð³â ëàçåðíî¿ ïëàçìè. Âïåðøå îòðèìàí³ äàí³ ïðî ïåðåð³çè åëåêòðîííîãî çáóäaeåííÿ çà ðàõóíîê ç³òêíåíü äëÿ ³îí³â Ba â àðãîíîâ³é ïëàçì³ ç âèêîðèñòàííÿì íàáëèaeåííÿ äåáàºâñüíîãî åêðàíþâàííÿ.Êëþ÷îâ³ ñëîâà: äåòåêòóâàííÿ ïàðàìåòð³â ïëàçìè, íàáëèaeåííÿ äåáàºâñüíîãî åêðàíþ-âàííÿ , ïåðåð³ç çáóäaeåííÿ çà ðàõóíîê åëåêòðîííèõ ç³òêíåíü

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