l. 8 (199 ACTA PHYSICA POLONICA A o 1 oceeigs o e 15 Ieaioa Semia o Suace ysics esieka 1991 OGESS I UESAIG O AKAI MEA IEACIO WI A SIICO SUACE . SOUKIASSIAN * Commissaia a Eegie Aomique Seice e ecece su es Suaces e Iaiaio e a Maiee Cee Eues e Sacay 91191 Gi su Yee Cee ace a eaeme e ysique Uiesie e ais-Su 915 Osay Cee ace (Received June 12, 1991) e aomic a eecoic sucue a ieace omaio o akai mea (a K Cs a Si(1 1 suaces is iesigae y ooe- missio — S US — usig sycoo aiaio scaig ueig micoscoy (SM a y ooemissio eee -ay asoio ie sucue (EAS eeimes e S-US esus iicae a e akai mea-siico o is a weak a oaie coae oig ee a ow coeages wi asoae meaiaio a e mooaye I coas o III- semicouco suaces akai meas o o iuce sigiica suc- ua cages o e suace SM images eome wi aomic esouio o e eeseaie K/Si(1 1 sysems emosae a a oe moo- aye coeage e K aoms om oe-imesioa iea meaic cais a- ae o e Si imes ows (11 iecio a isa y 7 A wi a sige sie o asoio eow a a mooaye e K aoms occuy aious co- eisig sies wi o og age oe A oeig asiio occus aou a a mooaye i wic e asoae-asoae ieacio wic was so a egece i eoeica cacuaios aeas o e e eaig iig oce e oose moes a coces ae iscusse a comae o e aes sae-o-a eoeica cacuaios ACS umes 35- 73A 79Eq 5My Aso a eame o ysics oe Iiois Uiesiy eKa Iiois 115-5 USA (19 20 P. Sn . Intrdtn Suace sciece was asicay iiiae a e egiig o e ceuy y e iesigaios o agmui ayo Guey a oig o e eec o akai meas o e eecoic emissio o ugse caos [1-3] Sice a ime akai mea asoio o meaic o semicoucig suaces was iesiey i- esigae ecause o uamea as we as may aie asecs suc as caay- sis egaie eeco aiiy caoes io ousio ooeecic o emioic emies emioic coesio Scoky aie omaio egaie io souces o eua eam eices [-] Aoe sikig asec o akai meas is ei eceioa a esaie oe i e omoe oiaio a/o e iiaio o semicouco suaces [9 1] agmui a ayo ae sow a Cs aos iuce a amaic icease i e eecoic emissio o ugse caos as a esu o e ey imoa ecease (seea os o e Susae wok ucio e moe oose y agmui ayo Guey a oig a aou e same ime suggese a e akai mea ases is aece eeco o e suace eaig o e omaio o a ioic oig e Cs+ io oms wi is image a ioe eaig o e eucio o e suace wok ucio [1-3] We e Cs+—Cs+ isace is euce wi iceasig coeages e Cs+-Cs+ ieacio ookes eoaiaio o e ioes a suseque miimum i e susae wok ucio aou a a mooaye eyo e Cs oeaye ecomes mea- ic [1-3] Ui e eay s is icue was eiee o e ai o a yes o suaces ecause e sae a e ecease o e wok ucio uo akai mea eosiio was ey simia o a age aiey o susaes [11 1] owee ee i is moe ece aoaces e ioic oig moe was uae o eai e eecoic oeies o akai mea asoio o asiio mea suaces [13 1] I is case i is ecessay o ae eoeica meos akig io accou e ue eecoic sucue o e suace i aicua e esece o igy ocaie eecoic suace saes [15] om eoeica AW ab initio l aios usig e oca esiy ucioa aoac ( [15 1] as we as om ooemissio eeimes usig sycoo aiaio (S US a eeco eegy oss secoscoies (ES [13 1 17] i was emosae a e aue o e oig ewee akai mea asoaes a asiio mea suaces suc as W(1 Mo(1 a(1 Mo(11 a W(11 was sog oaie a co- ae ee a ow coeages [17] is oig was sow o e ome as a esu o e yiiaio ewee e akai s aece eeco a e susae oca- ie eecoic d suace sae [15 17] e asece o sigiica cage ase was aso emosae y e ack o age sis a e susae a/o asoae coe ees [17 1] I coas e cassic ioic oig icue aeas o emai suiae o eium-ike suaces ike aumiium o u -a mea as eoe o e ooig o suace eee -ay asoio ie sucues (SEAS US a ES measuemes [19-1] e case o e eecoic oeies o a- kai mea/semicouco sysems is ieesig sice ese suaces a ieaces ae aso ike asiio meas [] ocaie eecoic suace saes as agig os So oe o e imoa issues is o kow i oe o ese icues cou aso e ai o eemea semicouco/akai mea sysems Progress in Understanding of Alkali Metal Interaction ... 1 I is aice I wi eiew e cue saus aou e aomic a eec- oic sucues o akai mea/siico sysems ase o ou ece iesigaios wi ooemissio (S—US usig sycoo aiaio eee -ay a- soio ie sucues (SEAS—EAS a scaig ueig micoscoy (SM eeimes e oose moes a coces o akai mea aso- io o siico wi e iscusse a comae wi e mos ece eoeica cacuaios Exprntl dtl h S-US a EAS eeimes wee eome a e Sycoo aiaio Cee o e Uiesiy o Wiscosi—Maiso usig a eeimea came a essue ee a 3 • 1 -11 o e ooeeco eegy was aaye y a age-iegaig oue ass cyiica mio aaye (CMA Akai mea eosiio was eome usig SAES Gees souces Sice suaces moiie y akai mea oeayes ae ee sow o e igy sesiie o imuiies [9] a secia cae was ake o kee e suace cea e essue icease uig akai mea eosiio aways emais eow • 1 -11 o Moe eais aou eeimes a aa aaysis cou e ou esewee [ 9 1] . Eltrn prprt f ll tlS(002 x rf: ntr f th bndn, bnd lnth nd rf tllztn Oe way o ace i e oig ewee a asoae a a susae is ioic is o ook a e eec o ig a ow eecoegaie secies o e suace o iees ee siico Asoio o a igy eecoegaie eeme suc as uoie o Si(1 1 Si(111 1 a Si(1117 7 suaces as ee sow o iuce ey age cemica sis (seea eeco os o ige iig eegies a e Si coe ee osee i ooemissio secoscoy as a esu o a imoa cage ase om e siico suaces o e asoae [3] O e oe sie eosiio o ow eeco aiiy eemes suc as cacium o siico suaces as ee sow o iuce a imoa cemica si (1 e o owe iig eegy a e Si coe ee as a esu o a cage ase om e asoae o e susae [] So i case o a sog ioic oig ewee akai meas a siico suaces as aoe y ece seuooeia cacuaios [5] oe sou a eas eec amaic cages io e Si coe ee wi eisece o a age cemica si o owe iig eegy Isea ee is o sigiica cage o e Si coe ee ie osee i ooemissio o a K a Cs eosiio o e (1 suace o siico as sow i ig 1 [] is ues ou e moe o a ioic oig caime [5] o e ooig o seuooeia cacuaios igue isays aece a ooemissio seca o e eeseaie a/Si(1 1 ieace a aious soium coeages O e cea suace eak A eeses e 3 eecoic suace sae eae o e agig o wie eak is coece wi a uk-ike sae I case o a sog ioic oig oe sou eec esucio o is eecoic suace sae (eak A wi a 22 P. Soukiassian eosiio Isea uo a asoio eak A as is iesiy icease wi e coeage u o oe mooaye (I M e om 1 o M e iesiy o eak A eceases is eaio iicaes omaio o a eecoic ieace sae (eak C a 1 a M wi a 1 e iig eegy [] Simia eecoic ieace saes ae ee sow o occu wi oe akai meas o siico [ 7] as we as gemaium suaces [] I a cases e omaio o ese eecoic ieace saes is eae o e yiiaio [ 9] ewee e akai aece oias wi e susae p agig o eaig o a coae oig [ 3] e akai aece eeco wic as a eee wae ucio oses a o is caace oug e yiiaio wi e moe ocaie p agig o [ ] Aoe asec o akai mea/siico suaces cou e oaie y ookig a e a coe ees o e eeseaie a/Si(1 1 sysem i igs 3a a 3 As ca e See om ig 3a e a coe ee eiis a eaue aou 5 e owe kieic eegy a coeages aoe a a a mooaye is is eae o e omaio o asma osciaios [ ] ue coimaio o is asec cou e ou y eosig e sysem o sma amou o oy- ge as sow i ig 3 wee e asmo equecy is euce as a esu o cage ase om a o oyge eaig o e eucio o eecos ioe i Progress in Understanding of Alkali Metal Interaction ..