Li-pulse tsa Attosecond li senola liphiri tsa tieho ea nako

Li-pulse tsa Attosecondho senola liphiri tsa tieho ea nako
Bo-rasaense ba United States, ka thuso ea li-pulse tsa attosecond, ba senotse tlhahisoleseling e ncha mabapi lephello ea photoelectric: eho ntšoa ha motlakase ka photoelectricTieho e fihla ho metsotsoana e 700, e telele haholo ho feta kamoo ho neng ho lebelletsoe pele. Phuputso ena ea morao-rao e phephetsa mehlala e teng ea khopolo-taba 'me e kenya letsoho kutloisisong e tebileng ea likamano lipakeng tsa lielektrone, e leng se lebisang nts'etsopele ea mahlale a kang li-semiconductor le lisele tsa letsatsi.
Tšusumetso ea photoelectric e bolela ketsahalo ea hore ha leseli le khanya molek'hule kapa athomo holim'a tšepe, photon e sebelisana le molek'hule kapa athomo 'me e ntša lielektrone. Tšusumetso ena ha se e 'ngoe feela ea metheo ea bohlokoa ea quantum mechanics, empa hape e na le tšusumetso e kholo fisiks ea sejoale-joale, k'hemistri le saense ea thepa. Leha ho le joalo, tšimong ena, seo ho thoeng ke nako ea ho lieha ha photoemission e bile taba e tsosang khang, 'me mehlala e fapaneng ea khopolo-taba e e hlalositse ka maemo a fapaneng, empa ha ho tumellano e kopaneng e entsoeng.
Ha lefapha la saense ea attosecond le ntlafetse haholo lilemong tsa morao tjena, sesebelisoa sena se hlahang se fana ka mokhoa o sa tloaelehang oa ho hlahloba lefats'e la microscopic. Ka ho lekanya ka nepo liketsahalo tse etsahalang ka nako e khuts'oane haholo, bafuputsi ba khona ho fumana tlhaiso-leseling e batsi mabapi le boitšoaro bo matla ba likaroloana. Phuputsong ea morao-rao, ba sebelisitse letoto la li-pulse tsa X-ray tse matla haholo tse hlahisoang ke mohloli oa leseli o kopaneng Setsing sa Stanford Linac (SLAC), se ileng sa nka karolo ea limilione tse likete feela ea motsotsoana (attosecond), ho etsa hore lielektrone tsa mantlha li ione le ho "tlosa" molek'hule e thabileng.
Ho sekaseka haholoanyane litsela tsa lielektrone tsena tse lokollotsoeng, ba sebelisitse li-excited ka bonngoeli-pulse tsa laserho lekanya linako tsa ho ntšoa ha lielektrone ka litsela tse fapaneng. Mokhoa ona o ba file monyetla oa ho bala ka nepo liphapang tse kholo lipakeng tsa linako tse fapaneng tse bakoang ke tšebelisano-'moho lipakeng tsa lielektrone, ho tiisa hore tieho e ka fihla ho metsotsoana e 700. Hoa bohlokoa ho hlokomela hore tšibollo ena ha e netefatse feela likhopolo-taba tse ling tsa pele, empa hape e hlahisa lipotso tse ncha, e leng se etsang hore likhopolo-taba tse amehang li hloke ho hlahlojoa bocha le ho ntlafatsoa.
Ho phaella moo, phuputso ena e totobatsa bohlokwa ba ho lekanya le ho hlalosa ditieho tsena tsa nako, tse leng bohlokwa ho utlwisiseng diphetho tsa diteko. Ho kristallography ya protheine, ditshwantsho tsa bongaka, le ditshebediso tse ding tsa bohlokwa tse kenyeletsang tshebedisano ya di-X-ray le dintho, tlhahisoleseding ena e tla ba motheo wa bohlokwa wa ho ntlafatsa mekgwa ya botekgeniki le ho ntlafatsa boleng ba ditshwantsho. Ka hona, sehlopha se rera ho tswela pele ho hlahloba matla a elektroniki a mefuta e fapaneng ya dimolek'hule e le ho senola tlhahisoleseding e ntjha mabapi le boitshwaro ba elektroniki ditsamaisong tse rarahaneng le kamano ya tsona le sebopeho sa dimolek'hule, ho beha motheo o tiileng wa data bakeng sa ntshetsopele ya mahlale a amanang nakong e tlang.