Radiation peta

E huru no te karihi o etahi ngota i tapepe, whakakitea nei i roto i to ratou kaha ki te panoni (pirau noa), tahi e te paheke o te radiation (ionizing radiation). Ko te momo tino noa o te pirau karihi ko te radiation peta.

Radiation i huaina microparticles me ngā mara tinana, e whai te kaha ki te ionize matū. vai te reira i tae noa ki te absorption tūturu o tetahi taonga. Rauemi o te radiation (hangarau wāhi karihi ranei tika matū iraruke) e ahei, pērā tīariari te nuinga radiation mo te wa rawa te roa. Ko reira i roto i to tatou oraraa tonu radiation Natural. Ionizing radiation vai noa i mua i te whanautanga o te ao nga momo tuatahi o te ora.

radiation Beta - ko reira he awa tonu o positrons me ngā irahiko, e kua tukuna i roto i te pirau peta o ira tukituki ngota. he āhuatanga taua pirau kore o ngota katoa, engari ki etahi matū anake. Ko te irahiko (positrons ranei) e hanga e i roto i te otaota i roto i te faafariuraa o ngā iramoe ki ngā iraoho hurihia ranei. Ko te matūriki eu hua, e whai kahore tiaki me te papatipu era, ka karanga neutrinos me antineutrinos.

A, no te hanga e matua, nui haere ai te maha o ngā iraoho e tetahi, whakaritea ki te nui mua ki te pirau te pirau hiko. I roto i te positron pirau tiaki karihi ia heke wae. I roto i te wā e rua, e kore e te tau papatipu huri.

irahiko whakaputa (ranei positrons) riro puai rerekē mai i te kore ki te rohe mōrahi o te pūngao Em (rite ki te maha MeV).

radiation Beta he tūāwhiorangi pūngao tonu. Ko te taumata pūngao o te karihi ki te motuhake. tikanga o tēnei e ka i ia pirau muri kia tukua pūngao hou. Taua tonu o te tūāwhiorangi tukunga tika ki te meka e taea te tohaina te pirau o te pūngao i te taikaha ngota i waenganui i nga matūriki tukuna rerekē. Na reira, kei te tukuna te neutrinos tūāwhiorangi i roto i te pirau, kei te hoki āhuatanga reira i te tonu.

Whanganga spectrometers radiation beta peta, beta porotiti motuhake me ruma ionization

kanoirite iraruke e pirau, ka tahi e te paheke o tenei momo, ka karanga beta-emitters. Ēnei ngā kanoirite o whanariki (S35), he ūkuikui (32P), konupūmā (Ca45) me etahi atu. Ki te kore e haere tahi te pirau i te kama irradiation, huaina ko reira peta radiation parakore.

He maha emitters (32P, 14C, Ca45, S35, me ētahi atu) ka whakamahia i roto i te ehu iratuke tātaritanga, me te whakamahia mō ngā take whakamātautau.

E haere ana i te taonga, hihi peta (beta radiation) pāhekoheko ki te karihi o ona ngota me ngā irahiko, te haamau'araa i runga reira ratou pūngao katoa a tata rawa tu tona kaupapa. Ko te ara e tika ana i te taonga beta-matūriki, ka karanga i tēnei. Kei te whakahuatia te reira i roto i karamu ia henemita tapawha (denoted rite g / cm2).

taea ki te tomo ki roto ki te kikokiko tinana ora ki te hohonu o te 2 henimita radiation peta he. Hei tiaki ki taua radiation taea hipoki Plexiglas matotoru tika.

Beta-hihi tohu tetahi o nga momo o ionizing radiation. A, no te haere i roto i te hihi ngaro taonga pūngao meinga ionization. Absorption o te pūngao i te reo e taea meinga he maha o ngā tukanga tuarua i roto i te rauemi i oti nei irradiation. Hei tauira, kia puta tenei i roto i te luminescence, hohenga radiation-matū, te huri i te hanganga karaihe o matū, me te pera i runga i. D. Just rite tahi atu momo o te radiation, hihi peta i te pānga radiobiological.

hāngai ana te whakamahi o te peta radiation i roto i te rongoā i runga i tona kătahi i roto i te āhuatanga o te papanga. whakamahia hihi ausia, interstitial me intracavitary therapy radiation.