OPTICA PURA Y APLICADA - Vol

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1 OPTICA PURA Y APLICADA - Vol CLASSIFIED LINES IN THE SPECTRUM OF Xe II G. BERTUCCELLI*, J. REYNA ALMANDOS, O. DI ROCCO* and M. GALLARDO * Universidad Nacional del Centro, 7000 Tandil, Rep. Argentina Centro de Investigaciones Opticas La Plata. Rep. Argentina ABSTRACT Te spectrum of xenón emitted by a non-conventional ligt source as been studied. A bout 123 lines are classied in te range A. RESUMEN Ha sido estudiado el espectro del xenón em itido por una fuente luminosa no convencional. Son clasicadas alrededor de 123 I fneas en el rango de A. 1. INTRODUCTION Reyna Almandos et al (1) recently reported results n te spectrum of singly onized xenón. About 40 lines were classied in te A range belonging to 6s-4f and 5d-4f transitions. An extended compilation oines of te xenón spectra by Gallardo and Reyna Almandos (2) sows tat tere are many unclassied lines distributed trougout te wole wavelengt range investigated. Te present work as made use of tis compilation and additional material for classifying 123 lines corresponding to 5d-6f, 6s-7p, 5d-7p, 6s-6p, 4f-5g, 8s-6p, 7s-4f, 6s-4f, 5d-4f, 5d-5f, 5d-6p, 6d-4f, 6d-5g, 6p-7s, 6p-8s, 6p-5g, 6p-6g, 6p-6d, 6p-5d, 7p-5g, 7p-8s, 7p-6d, 4f-6g and 4f-7g transitions. 2. EXPERIMENTAL METHODS All spectra were produced in puré xenón conned in a tube originally designed for pulsed láser operation. Te ligt source is similar to tat described by Reyna Almandos et al (1). Spectrograms were recorded using torium (3) as a reference spectrum, and te probable wavelengt error seldom exceeds 0.05 A, 0.03 A and 0.01 A for lines measured in te rst, second and tird diffraction orders respectively. Systematic sifts, resulting from te use of a non-conventional ligt source, were frequently found. A com paration between lines measured by Humpreys (4) and tose determined wit our source revealed sifts tat are different for different transitions, te máximum differences aobs- a H u m p re y s 6eing about cm 1 corresponding to 6p-6d and 6p-7s transitions. However, greater sifts can be observed in oter transitions, but not systematically. Full experimental details are given in (1), wic also assign 50 new lines to Xe II spectra. 3. RESULTS Not only te wavelengts listed in (2) but also a number oines corresponding to unpublised material (5,6) as been used for classifying te Xe II lines. Partof tis matrial (6) contains new lines and te revised ionic assignation of a group oines tat is reported as Xe II or Xe ll-lll in (2). All Xe II lines were classied in accordance wit data obtained in AEL (7) and modications proposed by Hansen and Person (8) are given in Table I. Te tird and fourt columns of te table give te wavenumber of te lines and sow te degree of agreement between observed and calculated valúes taking into account te sifts in our lines. 163

2 TABLE I Classied Xe II Lines in te Región A Comments o ines sapes: A = asymetric; B = blended; H = wide Symbols in colum n ve; a = unpublised material (5,6); b = revised assignation 164

3 165

4 166

5 O ( 3P i)5d[2] s^ - ( 3P2)7 p [1] ^ ( *D2)5 d[2 ]5^ - ( 3P2) 7p[2] 3^ 1A ( 3D2) 5d[ 2] 3P1) 4f[ ( 3P i)6p [1]! - ( 3D2)7s[2] 3^ a ( 3P 1 ) 6p[2]5^ -( 3P 1 )6d[2] ( 3P0)5d[2] 3^ - ( 1D2) 6p [2] ( 3Pa)6p[2] 3^ - ( 3P2) 8s[2] ( 3P i)6p [2]s -(3P2) 83[2]s/ ( 3P2) 7s[2] 5^ - ( 3D2)4f [2] 5/z 3B ( 3P2)5d[3] 5 -(*D 2) 6p [3] 1A ( 3P i ) 6p[ 1] 3^ - ( 3P2) 8s[2] 3^ ( 3P2) 5d[ 315^ -( 'Dz) 6p[ 1] 3^ b ( 3P2) 7s[2]5^ - ( 1D2)4 f[ 1] 3^ a ( 3P j ) 6s[ 1 ] i^-( 3D2) 6pC 1] 3^ a ( ^ j. ) 6p [3 ] 3P2) 5g[2]S/z ( 1D2)6p[3]5/2- ( 3Pz) 5g[4] 7^ a ( 3P2)4 f[4 ],^ - ( 3Pi) 5g[3]7/i a 0A ( 3P2) 4f [3 ]s^-( 3P1) 5g[4] 7^ 2B ( 3P0) 6p[ 1] i^-( 3P 1) 7s[ 1 ] 3^ ( 3P, ) 6.C 1 ] P i)6p[ 1] 5 í >24 ( 3P2) 7p[ 3] 5/ - ( 3P1) 5g[ 3] 5 ( ( 3PZ)7pC3 ]5, - ( 3P 1) 5gC3 ]s, * 1H ( 3D2) 6p[ 3] 7/2- ( 3P2) 5g[4]<>^ ('ü^ópc 3] 7^ - ( 3P2) 5g[4] 7^ 1H j ' 77 K M 4f[ 5] ( *P i ) 5BC5 3,^ 3.82 ( 3P2)4 f[5 ]9 ^ -(3Pi)5gC5]n^ 167

6 O ( 3P2) 4f[5 ] ^ - ( 3Pi) 5gC3] ^ a IB ( B '93 ( 3P2)6d[4]<^-( 1D2)4f[4],^ ( 3P2) *fc *3T^-(3Pi) 5gC5D9^ }'23 ( ( P2)4f[4]7^-( Pi)5g[ 3]?^ a /.08 /( sp2)4f[4]7a- ( 3Pi)3g[3]5^ ( 3PZ) 4f [ 2] 5^-( 3P2) 5g[4 ] 7^ 1A ( 3P2) 6d[ 4 ] 7, - ( ^ 2) 4f[4]7, 2B ( 3P2) 6d[ 3] 7, - ( % ) 4f[5]9, IB ( % ) 5d[ 3]5/- ( 3P2) 7p[ 3] i L f i ( 3P2)6d[4]7/- ( 1Dz)4f[3]S/ í i ( 3P2)4 f[5 ]9, - ( 3P2)7g[5]11, 0B ( 3P2)4fC5]11^ ( 3P0) 5g[4],^ ( 3P2) 6d[ 2]S/- ( 3D2) 4f[ 1] 3/ a ( 3P2)4f[ 4],. - ( 3Pz)6g[6], 1 a O ( 3P2) 7p[ 3] 3P1) 8s[ 1] 3 O ,90 ( ( ^ 2) 4f[5] 1 y-( P2)6g[5] 1 a.84 ) ( 3P 2 )«[5 ]n /- ( 3P2)6g[5],/í; ( 3P2)4f[ 5]9/- ( 3P2)6g[4], a ( 3P2)4f[5 ],.- ( 3P2)6g[5]1 j. a ( 3P2)7p[2]5, - ( 3D2) 6d[2]3/ f i O ( 3P1) 6p[0]j.- ( 3P2) 6p[1]j. O ( 3P2) 8s[2] 3^ - ( 1D2) 6p[2]5^ O ( 3P1) 6p[ 1] 3. - ( ) 5d[ 2] 3/ f i O ( 3P2) 6p [ l ] -(3P )6d[2], ( 3D2)6p[2]5, - ( 3P2)8 s[2 ]5, OA ( 3P2)7s[2]3, - ( S0)6p[1]1, O ( 3P,0) 6p[ 1] 3, - ( 3P2) 6d[ 1] j. /2 O ( 1D2) 6p [1 ],,-(3P2) 8s[2]3, a

7 ACKNOWLEDGEMENT Te autors wis to tank Dr. W. Persson, from Lund University, for is elpful suggestion wic made possible te present paper. REFERENCES 1. J.G. R E Y N A ALM ANDOS. M. G A LLA R D O and M. G A R A V A G L IA : Opt. Pur. ApL, 15, 1 (1982). 2. M. G ALLARDO and J.G. REYNA ALM ANDOS: "Xenón Lines in te Range from 2000 Ato 7000 A (Centro de Investigaciones Opticas 1981). 3. F.P.J. V A L E R O :;. Opt. Soc. Am., (1968). 4. C.J. HUMPHREYS: J. Res. Nat. Bur. Stand., 22, 19 (1939). 5. M. G ALLARDO, C.A. MASSONE, A.A. TA G LIA FE R R I, M. G A R A V A G LIA and W. PERSSON: Unpublis material (1973). 6. J.G. REYNA ALM ANDOS, G. BERTUCCELLI and M. G ALLARD O : Unpublised material (1980). 7. CH.E. MOORE: "A tom ic Energy Levels IM " (Nat. Bur. Stand. 1958). 8. J.C. HANSEN and W. PERSSON: Prívate communication (1980). 169