THEORETICAL AND EXPERIMENTAL INVESTIGATION OF THE SATELLITE STRUCTURE OF 1s2 1So - 1s3p 1P1 LINE IN He-LIKE IONS

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THEORETICAL AND EXPERIMENTAL

INVESTIGATION OF THE SATELLITE STRUCTURE OF 1s2 1So - 1s3p 1P1 LINE IN He-LIKE IONS

E. Aglistkii, A. Panin, U. Safronova, S. Ulitin, L. Vainshtein, Y. Mikhailov, A.

Rode, G. Skliskov, M. Cornille, J. Dubau, et al.

To cite this version:

E. Aglistkii, A. Panin, U. Safronova, S. Ulitin, L. Vainshtein, et al.. THEORETICAL AND EXPERIMENTAL INVESTIGATION OF THE SATELLITE STRUCTURE OF 1s2 1So - 1s3p 1P1 LINE IN He-LIKE IONS. Journal de Physique Colloques, 1988, 49 (C1), pp.C1-267-C1-269.

�10.1051/jphyscol:1988157�. �jpa-00227571�

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JOURNAL DE PHYSIQUE

Colloque C1, Suppl6ment au n 0 3 , Tome 49, Mars 1988

THEORETICAL AND EXPERIMENTAL INVESTIGATION OF THE SATELLITE STRUCTURE OF 1s' IS,

-

^{1 ~ 3 p}'PI LINE IN He-LIKE IONS

E.V. AGLISTKII, A.N. PANIN, U.I. SAFRONOVA, S.A. ULITIN,

L.A. V A I N S H T E I N * , Y.A. M I K H A I L O V * , A.V. RODE", G.V. S K L I S K O V * , M. CORNILLE*

,

J. DUBAU*

,

M. LOULERGUE* *

,

^P.FAUCHER* * * and

F. BELY-DUBAU'**

Institute of Spectrascopy, USSR Academy of Sciences, Troitsk 142092, USSR

' ~ e b e d e v Physical Institute, USSR Academy of Sciences, Moscow 117924, USSR

'"~bservatoire de Paris, F-92195 Meudon Principal Cedex, France

* * * ~ b s e r v a t o i r e de Nice, BP 139, F-06003 Nice Cedex, France

Les raiessatellites de la deuxikme raie de risonance des ions hilimoides ls2- ls3p du P,

K,

Fe, Cu sont Ctudiies. La risolution du spectre du phosphore est su- p6rieurehcelles des spectres du K, Fe et Cu obtenus par une technique expirimenta- le diffkrente. Les paramhtres atomiques nicessaires h l'analyse des spectres pri- cedents, obtenus par deux mithodes thioriques differentes, sont compares.

Abstract

Satellite lines of the He-like second resonance lines (i.e. ls2-ls3p) of P, K, Fe, Cu are studied. The spectral resolution of P is better than those of K t Fe, Cu, obtained by a different e::perimcntal set-up. Thc atomic parameters, requlred for the spectral analysis and obtained by two different theoretical methods, are compared.

Introduction

Satellite lines of the second resonance line of He-like ions (i.e. Is2-ls3p) have been scarcely considered up to now. Observations by Feldman et al.(l) andAglits- kii et a1.(2) in the spectra of laser plasmas have allowed primary identification of these lines. Boiko et a1.(3) proposed a rather complete study of these satellites for Z = 12-19 He-like ions. More recently, plasma parameters have been deduced frou a theoretical analysis of the spectra by Audebert et a1.(4), (5). In the pre- sent paper a conparison is made of ab-inltio calculations with experimental data.

The spectral lines studied are the n = 2 satellites of the IsZ

'so -

ls3p 'pl He-li- like resonance line. Wavelengths as well as radiative and non-radiative (autoioni- sation) probabiliries are calculated for the atomic elements with Z = 15,19, 26,29 (P, K, Fe, Cu) in two theoretical approaches MZ ( 6 ) and AUTOLSJ (7) decribed in details in the same issue: "Theoretical Spectra of FeXXIII -FeXIX in Two Calculations Me- thods". The experimental data were obtained by two different devices.

1. K, Fe, Cu Spectra

A low inductance vacuum spark was used as a source of multiply charged ions (8).

The source, the so-called "hot pointUis a dense (h'e Q 10'; ~ m - ~ ) and high temperatu- re ('Ie ^Q2-3 Ke V) plasma of a very small size (1 pm) and a short lifetime (10-"s) All parameters were gvaluated for Fe plasma. Curved crystals were used (2d = 4.19

h

for K and 2d = 2.36 A for Fe and Cu). Motions of the "hot point" cause a Doppler A 1

shift of the line (- .= 2-5 x

lo-')

which was eliminated in using two Johann spec- trometers. The lsnp A

-

ls2 He-like resonance lines, with n = 3to 6, are observed, as well as 1s

-

3p H-like resonance line. Close to the n = 3 and 4 He-like lines appear

Article published online by EDP Sciences and available at http://dx.doi.org/10.1051/jphyscol:1988157

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C1-268 JOURNAL DE PHYSIQUE

t h e L i - l i k e s a t e l l i t e s l i n e s I s 2 2.t-ls2EnL w i t h n = 3 and 4. Due t o t h e h i g h d e n s l - t y of t h e plasma t h e l i n e s a r e broad what j u s t i f i e s a comparison w i t h t h e combination o f s e v e r a l t h e o r e t i c a l l i n e s . For such a r e a s o n , t h e densitograms o f K,Fe, Cu a r e not g i v e n but t h e c o r r e s p o n d i n g d a t a a r e i n Table 1. A l l t h e s a t e l l i t e l i n e s n = 2 of t h e resonance l i n e s 1s'-1s 3p have been s h i f t e d by A X = 2.4 f o r K and 2. f o r Fe and Cu, where A h i s t h e d i f f e r e n c e between the resonance l i n e wavelengths ( I s 2 - l s 3 p ) c a l t u l a ~ c d by HZ and ALrlOLS.1 mc.thc,d:,. Under dcrlsr plasma c o n d i t i o n s a r c o r - d i n g t o A u d e l t r t e l e l .

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psAr is t a b u l a t e d i n s t e a d of t h e l i n c f a c t o r F, v h e r c

gs i s t h e s t a t i s t i c a l v c i g h t of t h c upper l e v e l .

T a b l e 1

-

D i e l e c t r o n i c s a t e l l i t e s t o t h e I s 2

'so -

^{l s 3 p}'pl l i n e f o r K , Fe, Cu c a l c u l a t e d w i t h AUTOJOLS method ( a ) and MZ method (b)

2. P Spectrum

Nd l a s e r beam i s focused on a phophorus plane t a r g e t by an a s p h e r i c a l l e n s . The l a s e r i n t e n s i t y r e a c h e s 5 x 1 0 ' ~ W cm-2 and t h e f o c a l s p o t i s 30 rum. diameter. The geometry of t h e experiment i s s u c h a s t o minimize t h e e f f e c t of plasma motions ando dimension on t h e l i n e w i d t h and s h i f t . For t h i s purpose, a CaF, c r y s t a l (2d= 6 . 2 8 ~ ) i s p l a c e d p e r p e n d i c u l a r l y t o t h e t a r g e t . The d e t a i l e d d e n s i t o g r a m i s s h o w n i n F i g . 1 Wavelengths of t h e s a t e l l i t e l i n e s have been determined on t g e b a s i s of d i s p e r s i o n measurements of l i n e s l s 2 p 2 2~

-

1 s 2p 'P,,, ( h = 2.2375 A ) , l s 2 p 'pl

-

^{I s 2}

'so

5 / 2

(A = 5.7605

i),

2 p 2 ~ , , , - ~ S ~ S ~ , ~ ( 5 . 3 8 1 5

11,

l s 3 p 'P,

-

^{I s 2}

'so

( A = 4.9185

A),

' - 0

I s 4p 'pl

-

1 s 2

'so

⁽^h⁼^4.6800 ^{A ) .} These wavelengths were t a k e n from MZ c a l c u l a - t i o n s . A l l t h e atomic p a r a m e t e r s have been c a l c u l a t e d w i t h t h e two t h e o r e t i c a l approaches t o i n v e s t i g a t e t h e s a t e l l i t e s p e c t r a n o t only t o t h e l i a c I s 2 - l s 3 p b u t : , ] S O L~ I

t h e resonance l i n e s l s 2 - l s 2 p a s w e l l a s I s 2 - l s 4 p . The agreement b e t w e t n t h e two mc- t h o d s i s q u i t e good f o r gs A r . For w a v e l e n g t h s , we n o t e a d i f f e r e n c e A). between t h e resonance l i n e w a v e l e n g t h s ( l s 2 - 1 ~ 3 ~ ) of 2. 1 . 6 l o - ? . The f u l l s e t of d a t a a r e not g i - ven h e r e but w i l l bc submi ~ t e d for i n .l. Phys. li.

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Fig.1 : Spectrum of P

Resonance lines Is2-ls3p 23.24

Satellites lines : ls22p-ls2L3E1 17,18,19,20,21,22

References

(1) M. Feldman, G.A. Doschek, D.J. h'agel, R.D. Cowan, R.R. Whitlock, Astrophys. J.

192 213 (1974).

-

(2) E.V.Aglitskii, V.A. Boiko, S.M. Zakharov, S.A. Pikuz, A. Ya, Faenov, Kvant.

Electron. 1 9 0 8 (1974) Sov. J. Quantum Electron.

5

500 (1974)

(3) V.A. Boiko, S.A. Pikuz, U.I. Safronova, A. Ya. faenov, Mon. Not. R Astron. Soc.

185 789 (1978)

-

(4) P. Audebert, J.P. Geindre, J.C. Gauthier, Ph. Alaterre, C. Popovics,M.Cornille, J. Dubau, Phys. Rev. A

30

1582 (1984).

( 5 ) P. Audebert, J.P. Geindre, J.C. Gauthier, C. Chenais-Popovics, M. Cornille,

J. Dubau, P. Faucher, Phys. Rev. A,

21

3120 (1985).

(6) L.A. Vainstein, U.I. Safronova, Atomic and Nuclear Data Tables

11,

49 (1978).

(7) J. Dubau. A.H. Gabriel, W. Loulergue, L. Steenman-Clark, S. Volontk, Hon. Not .R Asron. Soc.

195

705 (1 981).

(8) E. Aglistskii et al., Report USSR Academy of ~ c i h n c e s

50

1255 (1986).