Thaum nws yog dawb nyob rau hauv qhov chaw txias, cov molecule yuav spontaneously txias los ntawm slowing down nws rotation thiab poob lub zog rotational nyob rau hauv quantum transitions.Physicists tau pom tias qhov no rotational txias txheej txheem yuav accelerated, slowed down los yog txawm inverted los ntawm kev sib tsoo ntawm molecules nrog ib puag ncig hais. .googletag.cmd.push(function() { googletag.display('div-gpt-ad-1449240174198-2′); });
Cov kws tshawb fawb ntawm Max-Planck lub koom haum rau Nuclear Physics hauv lub teb chaws Yelemees thiab Columbia Astrophysical Laboratory tsis ntev los no tau ua ib qho kev sim los ntsuas qhov kev hloov ntawm quantum uas tshwm sim los ntawm kev sib tsoo ntawm molecules thiab electrons. ntawm qhov piv txwv no, uas yav tas los tsuas yog kwv yees theoretically.
"Thaum cov hluav taws xob thiab cov molecular ions nyob hauv cov pa tsis muaj zog ionized, cov neeg qis tshaj plaws ntawm quantum-theem ntawm cov molecules tuaj yeem hloov pauv thaum sib tsoo," Ábel Kálosi, ib tug ntawm cov kws tshawb fawb uas ua txoj kev tshawb no, hais rau Phys.org. "Ib qho piv txwv ntawm qhov no txheej txheem yog nyob rau hauv interstellar huab, qhov twg kev soj ntsuam qhia tias molecules yog feem ntau nyob rau hauv lawv qis tshaj quantum xeev. Qhov kev nyiam ntawm cov hluav taws xob tsis zoo thiab cov nqi hluav taws xob zoo molecular ions ua rau cov txheej txheem sib tsoo hluav taws xob tshwj xeeb. "
Tau ntau xyoo, physicists tau sim theoretically txiav txim siab yuav ua li cas muaj zog dawb electrons cuam tshuam nrog cov molecules thaum sib tsoo thiab thaum kawg hloov lawv lub xeev rotational.Txawm li cas los xij, txog tam sim no, lawv cov kev kwv yees theoretical tsis tau sim hauv qhov chaw sim.
"Txog tam sim no, tsis muaj kev ntsuas tau ua los txiav txim siab qhov siv tau ntawm qhov hloov pauv ntawm lub zog hloov pauv rau cov khoom siv hluav taws xob thiab qhov kub thiab txias," piav qhia Kálosi.
Txhawm rau sau qhov ntsuas no, Kálosi thiab nws cov npoj yaig tau coj cov khoom siv hluav taws xob sib cais mus rau hauv kev sib raug zoo nrog cov hluav taws xob ntawm qhov kub thiab txias nyob ib puag ncig 25 Kelvin.Qhov no tso cai rau lawv sim ntsuas qhov kev xav thiab kev kwv yees uas tau teev tseg hauv cov haujlwm dhau los.
Hauv lawv cov kev sim, cov kws tshawb fawb tau siv lub nplhaib cia cryogenic ntawm Max-Planck lub koom haum rau Nuclear Physics hauv Heidelberg, lub teb chaws Yelemees, tsim los rau hom-xaiv molecular ion kab teeb. feem ntau emptied los ntawm lwm yam gases tom qab.
"Nyob rau hauv lub nplhaib cryogenic, khaws cia ions tuaj yeem ua kom txias txias rau qhov kub ntawm lub nplhaib phab ntsa, yielding ions puv ntawm qis qis qis qis qis," Kálosi piav qhia. tsuas yog ib qho nruab nrog lub teeb hluav taws xob tshwj xeeb uas tuaj yeem raug coj mus rau hauv kev sib cuag nrog molecular ions. Cov ions tau khaws cia rau ob peb feeb hauv lub nplhaib no, lub laser yog siv los soj ntsuam lub zog sib hloov ntawm molecular ions. "
Los ntawm kev xaiv ib qho kev kho qhov muag wavelength rau nws qhov kev sojntsuam laser, pab pawg tuaj yeem rhuav tshem ib feem me me ntawm cov ions khaws cia yog tias lawv lub zog hloov pauv tau sib npaug li qhov wavelength.Lawv mam li kuaj pom cov tawg ntawm cov molecules cuam tshuam kom tau txais lub npe hu ua spectral signals.
Pab neeg no tau sau lawv cov kev ntsuas nyob rau hauv lub xub ntiag thiab tsis muaj electron collisions.Qhov no tso cai rau lawv mus ntes cov kev hloov nyob rau hauv cov kab rov tav cov neeg nyob rau hauv lub qis kub tej yam kev mob nyob rau hauv qhov kev sim.
Kálosi tau hais tias "Yuav ntsuas cov txheej txheem ntawm kev hloov pauv ntawm lub xeev hloov kev sib tsoo, nws yog ib qho tsim nyog los xyuas kom meej tias tsuas muaj qhov qis tshaj qhov kev sib hloov ntawm lub zog nyob rau hauv molecular ion," Kálosi hais tias. ntim, siv cov cua txias kom txias kom txias hauv qab chav sov, uas feem ntau ze rau 300 Kelvin. Hauv qhov ntim no, cov molecules tuaj yeem raug cais tawm ntawm cov molecules ubiquitous, Infrared thermal tawg ntawm peb ib puag ncig. "
Hauv lawv qhov kev sim, Kálosi thiab nws cov npoj yaig tuaj yeem ua tiav qhov kev sim hauv qhov kev sib tsoo hluav taws xob tswj hwm hluav taws xob hloov pauv.Los ntawm kev siv cov hluav taws xob txaus, lawv tuaj yeem sau ntau qhov kev ntsuas ntawm electron sib tsoo nrog CH + molecular ions.
Kálosi tau hais tias "Peb pom tias qhov kev hloov pauv hloov hluav taws xob hloov pauv hloov pauv hloov pauv raws li kev kwv yees yav dhau los," Kálosi tau hais. Peb cia siab tias cov kev suav yav tom ntej yuav tsom mus ntxiv rau qhov muaj feem cuam tshuam ntawm kev sib tsoo hluav taws xob ntawm cov neeg qis tshaj plaws hauv cov neeg mob khaub thuas, cais quantum systems. "
Ntxiv nrog rau kev lees paub qhov kev kwv yees kwv yees nyob rau hauv qhov chaw sim thawj zaug, kev ua haujlwm tsis ntev los no ntawm pab pawg ntawm cov kws tshawb fawb no yuav muaj qhov cuam tshuam rau kev tshawb fawb tseem ceeb.Piv txwv li, lawv qhov kev tshawb pom qhia tias ntsuas qhov ntsuas hluav taws xob hloov pauv hauv quantum zog qib tuaj yeem ua tau. Nws yog ib qho tseem ceeb thaum soj ntsuam cov cim tsis muaj zog ntawm cov molecules hauv qhov chaw kuaj pom los ntawm xov tooj cua telescopes los yog tshuaj reactivity nyob rau hauv nyias thiab txias plasmas.
Nyob rau hauv lub neej yav tom ntej, daim ntawv no tuaj yeem ua txoj hauv kev rau cov kev tshawb fawb tshiab uas xav txog qhov cuam tshuam ntawm electron kev sib tsoo ntawm txoj hauj lwm ntawm kev sib hloov quantum zog nyob rau hauv txias molecules.Qhov no yuav pab kom paub seb qhov twg electron collisions muaj zog tshaj, ua. nws muaj peev xwm ua cov kev sim kom ntxaws ntxiv hauv daim teb.
"Nyob rau hauv lub nplhaib cia cryogenic, peb npaj yuav ua kom paub ntau yam siv tshuab laser los soj ntsuam lub zog sib hloov ntawm ntau hom diatomic thiab polyatomic molecular," Kálosi ntxiv. . Kev ntsuas ntsuas ntawm hom no yuav txuas ntxiv mus ntxiv, tshwj xeeb tshaj yog nyob rau hauv kev soj ntsuam astronomy siv cov kev soj ntsuam muaj zog xws li Atacama Loj Millimeter / Submillimeter Array hauv Chile. ”
Thov siv daim foos no yog tias koj ntsib kev sau ntawv yuam kev, tsis raug, lossis xav xa daim ntawv thov hloov kho rau cov ntsiab lus ntawm nplooj ntawv no.Rau cov lus nug dav dav, thov siv peb daim foos tiv tauj.Rau kev tawm tswv yim dav dav, thov siv cov lus qhia pej xeem hauv qab no (thov ua raws cov lus qhia).
Koj cov lus teb yog qhov tseem ceeb rau peb.Txawm li cas los xij, vim muaj cov lus ntim ntau, peb tsis lav cov lus teb rau tus kheej.
Koj tus email chaw nyob tsuas yog siv los qhia rau cov neeg tau txais kev paub tias leej twg xa email.Tsis yog koj qhov chaw nyob lossis tus neeg txais qhov chaw nyob yuav raug siv rau lwm lub hom phiaj.Cov ntaub ntawv koj sau yuav tshwm rau hauv koj tus email thiab yuav tsis khaws cia los ntawm Phys.org hauv ib qho twg. daim ntawv.
Tau txais cov hloov tshiab txhua lub lim tiam thiab / lossis txhua hnub xa tuaj rau koj lub inbox.Koj tuaj yeem tso npe tau txhua lub sijhawm thiab peb yuav tsis qhia koj cov ntsiab lus rau peb tog.
Lub vev xaib no siv cov ncuav qab zib los pab kev taw qhia, txheeb xyuas koj qhov kev siv peb cov kev pabcuam, sau cov ntaub ntawv rau kev tshaj tawm tus kheej, thiab pabcuam cov ntsiab lus los ntawm peb lub vev xaib, koj lees paub tias koj tau nyeem thiab nkag siab peb Txoj Cai Tswjfwm Ntiag Tug thiab Cov Cai Siv.
Post lub sij hawm: Jun-28-2022