PbWO₄ Scintillator, Pwo Crystal, Pbwo4 Crystal, Pwo Scintillator

I-PbWO₄ Scintillator, iPwo Crystal, iPbwo4 Crystal, iPwo Scintillator yoMfanekiso oFakelweyo

inkcazelo emfutshane:

I-Lead Tungstate - i-PWO (okanye i-PbWO₄) i-absorbe ye-gamma-ray esebenza kakhulu ngenxa yobuninzi bayo kunye nokuphakama okuphezulu kwe-Z. Ikwakhawuleza kakhulu kunye nobude obufutshane kakhulu bemitha kunye ne-moliere radius.

Thumela i-imeyile kuthi

Iinkcukacha zeMveliso

Iithegi zeMveliso

Inzuzo

● Amandla afanelekileyo okumisa

● Ukuxinana okuphezulu

● Amandla ombane aphezulu

● Ixesha lokubola ngokukhawuleza

Isicelo

● I-Positron Emission Tomography (PET)

● I-physics yendawo yamandla aphezulu

● Inyukliya yamandla aphezulu

● Amayeza enyukliya

Iipropati

Uxinaniso(g/cm³)	8.28
Inombolo yeAtom (Esebenzayo)	73
Ubude bemitha (cm)	0.92
Ixesha lokubola (ns)	6/30
Ubude beWaveleng (Ubuninzi. Ukukhutshwa)	440/530
I-Photoelectron Yield % ye-NaI(Tl)	0.5
Indawo yokunyibilika(°C)	1123
Ukuqina (Mho)	4
Refractive Index	2.16
Hygroscopic	No
I-Thermal Expansion Coeff.( C⁻¹)	10.0 x 10‾⁶
Cleavage Plane	(101)

Ingcaciso yeMveliso

I-Lead tungstate (PbWO₄/PWO) yikristale yescintillation edla ngokusetyenziswa kwimifuniselo yefiziksi yamandla aphezulu kunye nakwizicelo zemifanekiso yonyango efana ne-PET (positron emission tomography) kunye ne-CT (computed tomography) iskena.Enye yeempawu eziphambili ze-PWO, inoxinano oluphezulu, oluvumela i-PWO ukuba ifunxe imitha ye-gamma ngokufanelekileyo ngakumbi kunezinye iikristale ze-scintillation.Ngokulandelayo, oku kubangela umlinganiselo ophezulu wesignali ukuya kwingxolo kunye nesisombululo esingcono sokufunyanwa kwemitha.Iikristale ze-PWO nazo ziyaziwa ngamaxesha azo okuphendula ngokukhawuleza, okwenza ukuba zilungele iinkqubo zokufumana idatha yesantya esiphezulu.

Zikwamelana nomonakalo wemitha kunye nokuzinza kwexesha elide, okubenza babe lukhetho oluthembekileyo kwizicelo ezirhabaxa zokusingqongileyo.Nangona kunjalo, ukukhanya okusezantsi okuphumayo kweekristale ze-PWO xa kuthelekiswa nezinye izixhobo zokuthambisa kuyanciphisa uvakalelo lwabo kwezinye izicelo.Iicrystals zihlala zikhuliswa kusetyenziswa indlela yeCzochralski kwaye zinokubunjwa zibe ziindlela ezahlukeneyo ngokuxhomekeke kwisicelo.Iikristale ze-PWO scintillator zinemiba ilandelayo ekufuneka iqatshelwe: I-PWO inemveliso yokukhanya ephantsi.I-radioactive ngaphakathi ngaphakathi iyenza ingamkeleki kwezinye iinkqubo.Ziyakwazi ukonakala ngemitha.Ukuqala ngeedosi phakathi kwe-1 kunye ne-10 yeGrey (10² - 10³ rad).Kwaye iguqulelwe umva ngexesha okanye i-annealing.