CaF2(Eu) Scintillator, CaF2(Eu)crystal, CaF2(Eu)scintillation crystal
Molemo
● Thepa e ntle ea mochine.
● Ho se sebetse ka lik'hemik'hale.
● Mahlaseli a tlhaho a tlaase.
● Mehlala ea meralo e fapaneng e khonahala habonolo.
● E matla ho ea ho mocheso le ho tsosoa ha mechine.
Kopo
● Ho lemoha mahlaseli a gamma
● ho lemoha likaroloana tsa β
Thepa
| Boima ba 'mele(g/cm3) | 3.18 |
| Sistimi ea Crystal | Likhubu |
| Nomoro ea Atomic (E sebetsang) | 16.5 |
| Melting Point (K) | 1691 |
| Mocheso oa Katoloso ea Mocheso (C-1) | 19.5 x 10-6 |
| Sefofane sa Cleavage | <111> |
| Hardness (Mho) | 4 |
| Hygroscopic | No |
| Wavelength ea Emission Max.(nm) | 435 |
| Refractive Index @ Emission Max | 1.47 |
| Nako ea ho Bola ea Pele (ns) | 940 |
| Lihlahisoa tse Nyenyane (photons/keV) | 19 |
Tlhaloso ea Sehlahisoa
CaF2:Eu ke kristale ea scintillator e hlahisang leseli ha e pepesehetse mahlaseli a matla a phahameng.Likristale li na le calcium fluoride e nang le sebopeho sa kristale sa cubic le li-ion tsa europium tse nkeloang sebaka ka har'a letlapa.Ho eketsoa ha europium ho ntlafatsa thepa ea kristale ea scintillation, e etsa hore e sebetse hantle ho fetola mahlaseli hore e be leseli.CaF2:Eu e na le sesupo se phahameng le nomoro ea athomo e phahameng, e etsang hore e be lisebelisoa tse loketseng bakeng sa ho lemoha le ho hlahloba mahlaseli a gamma.Ho feta moo, e na le tharollo e ntle ea matla, ho bolelang hore e ka khetholla lipakeng tsa mefuta e fapaneng ea mahlaseli ho latela maemo a bona a matla.CaF2:Eu e sebelisoa haholo litšoantšong tsa bongaka, fisiks ea nyutlelie le lits'ebetso tse ling tse hlokang ts'ebetso e phahameng ea mahlaseli a kotsi.
CaF2:Eu scintillator crystals - litaba tseo u lokelang ho li ela hloko: Ka lebaka la boima ba eona bo tlase le Z e tlase, e na le tlhahiso e tlase ea khanya ha e sebelisana le mahlaseli a matla a matla a gamma.E na le leqhubu le bohale la ho monya ho 400nm leo karolo e 'ngoe e leng holim'a sehlopha sa scintillation emission.
Teko ea Ts'ebetso
[1]Emission spectrum:"emission_at_327nm_excitation_1" e tsamaellana le ho metha mabone a khanya ea fluorescence e tsoang kristale ha e hlasimoloha ke khanya ea 322 nm (ka 1.0 nm slitwidth mohloling oa monochromator).
Qeto ea wavelength ea spectrum ke 0.5 nm (slitwidth of analyser).
[2]Maqhubu a hlasimollang:“excitation_at_424nm_emission_1_mo1” e tsamaellana le ho metha fluorescence e ntshitsweng ka wavelength e tsitsitseng ya 424 nm (0.5 nm slitwidth on analyser) ha e ntse e hlahloba bolelele ba maqhubu a lebone le hlasimollang (0.5 nm monochromatwidth ho slitwidth).
Photomultiplier (lipalo ka metsotsoana) e ne e sebetsa hantle ka tlase ho saturation kahoo likala tse emeng, leha li sa tsitsa, li mela.
Leha mabone a putsoa bakeng sa Eu:CaF2 ho tsoa ho bahlahisi ba fapaneng a tšoana, re fumana hore mahlahahlaha a lipakeng tsa 240 le 440 nm a ka fapana haholo lipakeng tsa bahlahisi ba fapaneng:
moetsi e mong le e mong o na le signature ea hae ea "spectral" / "fingerprints".Re belaela hore liphapang li bonts'a maemo a fapaneng a litšila / likoli / oxidation (valence).
-ka lebaka la maemo a fapaneng a kholo le annealing ea kristale ea Eu:CaF2.
