CaF2(Eu) Scintillator, CaF2(Eu)crystal, CaF2(Eu)scintillation crystal
Ubwino
● Makanika abwino.
● Osagwiritsa ntchito mankhwala.
● Chibadidwe otsika maziko macheza.
● Mapangidwe amitundu yosiyanasiyana amapangidwa mosavuta.
● Kugwedezeka kwamphamvu kwa kutentha ndi makina.
Kugwiritsa ntchito
● Kuzindikira kwa kuwala kwa gamma
● kuzindikira kwa β-particles
Katundu
| Kachulukidwe (g/cm3) | 3.18 |
| Crystal System | Kiyubiki |
| Nambala ya Atomiki (Yogwira Ntchito) | 16.5 |
| Melting Point (K) | 1691 |
| Thermal Expansion Coefficient (C-1) | 19.5 x 10-6 |
| Ndege ya Cleavage | <111> |
| Kuuma (Mho) | 4 |
| Hygroscopic | No |
| Wavelength wa Emission Max.(nm) | 435 |
| Refractive Index @ Emission Max | 1.47 |
| Nthawi Yowonongeka Kwambiri (ns) | 940 |
| Zokolola Zowala (photons/keV) | 19 |
Mafotokozedwe Akatundu
CaF2:Eu ndi crystal scintillator yomwe imatulutsa kuwala ikakumana ndi cheza champhamvu kwambiri.Makristalowa amakhala ndi calcium fluoride yokhala ndi mawonekedwe a cubic crystal ndi ma europium ma ion olowa m'malo mwa lattice.Kuphatikizika kwa europium kumapangitsa kuti crystal scintillation ikhale yothandiza kwambiri posintha ma radiation kukhala kuwala.CaF2:Eu ili ndi kachulukidwe kwambiri komanso nambala yayikulu ya atomiki, yomwe imapangitsa kuti ikhale chinthu choyenera kuzindikira ndikuwunika kwa gamma-ray.Kuonjezera apo, ili ndi mphamvu yabwino yothetsera mphamvu, kutanthauza kuti imatha kusiyanitsa mitundu yosiyanasiyana ya ma radiation kutengera mphamvu zawo.CaF2:Eu imagwiritsidwa ntchito kwambiri muzojambula zamankhwala, sayansi ya nyukiliya ndi ntchito zina zomwe zimafuna kuzindikira kwamphamvu kwambiri.
CaF2:Makristalo a Eu scintillator - zofunika kuzidziwa: Chifukwa cha kuchepa kwake komanso kutsika kwa Z, imakhala ndi zokolola zocheperako zikamalumikizana ndi ma gamma-ray amphamvu.Ili ndi bandi yakuthwa yoyamwa pa 400nm yomwe imadutsana ndi gulu la scintillation emission
Kuyesa Magwiridwe
[1]Sipekitiramu yotulutsa:"emission_at_327nm_excitation_1" ikufanana ndi kuyeza mawonekedwe a kuwala kwa fluorescence komwe kumachokera ku krustalo kusangalatsidwa ndi kuwala kwa 322 nm (ndi 1.0 nm slitwidth pa gwero la monochromator).
Kutalika kwa mawonekedwe a sipekitiramu ndi 0.5 nm (slitwidth of analyser).
[2]Sipekitiramu yosangalatsa:"excitation_at_424nm_emission_1_mo1" ikufanana ndi kuyeza fulorosisi yomwe imatulutsidwa pamtunda wokhazikika wa 424 nm (0.5 nm slitwidth pa analyser) pamene ikuyang'ana kutalika kwa kuwala kwachisangalalo (0.5 nm monochromatwidth pa slitwidth).
Photomultiplier (kuwerengera pa masekondi) inali ikugwira ntchito pansi pa machulukitsidwe kotero kuti masikelo oyimirira, ngakhale mosagwirizana, amakhala a mzere.
Ngakhale mawonekedwe a buluu a Eu:CaF2 ochokera kwa opanga osiyanasiyana ali ofanana, timapeza kuti chisangalalo chapakati pa 240 ndi 440 nm chimatha kusiyana kwambiri pakati pa opanga osiyanasiyana:
wopanga aliyense ali ndi mawonekedwe ake siginecha / "zisindikizo zala".Timakayikira kuti kusiyanaku kukuwonetsa milingo yosiyanasiyana ya zonyansa / zolakwika / ma oxidation (valence).
-chifukwa cha kukula kwa zinthu zosiyanasiyana ndi annealing wa Eu:CaF2 crystal.
