PbWO₄ Scintillator, Pwo Crystal, Pbwo4 Crystal, Pwo Scintillator

Kufotokozera mwachidule:

Lead Tungstate - PWO (kapena PbWO₄) ndiwotsekemera kwambiri wa gamma-ray chifukwa cha kuchuluka kwake komanso kuchuluka kwa Z. Imakhalanso yachangu kwambiri yokhala ndi utali waufupi kwambiri wa radiation ndi moliere radius.

Titumizireni imelo

Tsatanetsatane wa Zamalonda

Zolemba Zamalonda

Ubwino

● Mphamvu yabwino yoyimitsa

● Kuchulukana kwambiri

● Kutentha kwamphamvu kwambiri

● Nthawi yowonongeka

Kugwiritsa ntchito

● Positron Emission Tomography (PET)

● Fiziki yamlengalenga yamphamvu kwambiri

● Nyukiliya yamphamvu kwambiri

● Mankhwala a nyukiliya

Katundu

Kachulukidwe (g/cm³)	8.28
Nambala ya Atomiki (Yogwira Ntchito)	73
Utali wa Radiation (cm)	0.92
Nthawi Yowola (ns)	6/30
Wavelength (Max. Emission)	440/530
Photoelectron Zokolola % ya NaI(Tl)	0.5
Malo osungunuka(°C)	1123
Kuuma (Mho)	4
Refractive Index	2.16
Hygroscopic	No
Thermal Expansion Coeff.( C⁻¹)	10.0 x 10‾⁶
Ndege ya Cleavage	(101)

Mafotokozedwe Akatundu

Lead tungstate (PbWO₄/PWO) ndi kristalo wa scintillation womwe umagwiritsidwa ntchito poyesa mphamvu zamphamvu kwambiri komanso pojambula zithunzi zachipatala monga PET (positron emission tomography) ndi CT (computed tomography).Chimodzi mwazinthu zofunika kwambiri za PWO, chimakhala ndi kachulukidwe kwambiri, chomwe chimalola PWO kuyamwa cheza cha gamma mogwira mtima kuposa makhiristo ena a scintillation.Zotsatira zake, izi zimabweretsa chiŵerengero chapamwamba cha ma signal-to-noise komanso kuzindikira bwino kwa ma radiation.Makhiristo a PWO amadziwikanso ndi nthawi yawo yoyankha mwachangu, zomwe zimawapangitsa kukhala oyenera pamakina otengera ma data othamanga kwambiri.

Amakhalanso osagonjetsedwa ndi kuwonongeka kwa ma radiation ndi kukhazikika kwa nthawi yaitali, kuwapanga kukhala chisankho chodalirika pa ntchito zovuta zachilengedwe.Komabe, kutulutsa kocheperako kwa makristalo a PWO poyerekeza ndi zida zina zopangira scintillation kumachepetsa chidwi chawo pazinthu zina.Makhiristo nthawi zambiri amakula pogwiritsa ntchito njira ya Czochralski ndipo amatha kupangidwa m'njira zosiyanasiyana kutengera momwe angagwiritsire ntchito.Makatani a PWO scintillator ali ndi izi zomwe ziyenera kuzindikirika: PWO imakhala ndi kuwala kochepa.Amakhala ndi ma radioactive omwe amapangitsa kuti zikhale zosavomerezeka pamapulogalamu ena.Iwo amatha kuwonongeka ndi ma radiation.Kuyambira ndi milingo yapakati pa 1 mpaka 10 Imvi (10² - 10³ rad).Ndipo kusinthidwa ndi nthawi kapena nthawi.