Ngā Tauira Pātai e Matapaki ana i ngā Hihi Kamma me ngā Hihi-X
I roto i te ahupūngao, inā koa i roto i te ahupūngao karihi me te ahupūngao hauora, he mahi nui tā ngā hihi gamma me ngā hihi-X. He teitei ngā auau o ēnei momo irahiko hikohiko, ā, he nui te kaha hei uru ki roto i ngā mea totoka, ā, he mea nui ēnei hei taputapu mō te whānuitanga o ngā tono, mai i te rongoā mate pukupuku ki te whakaahua hauora. Ka tūhuratia e tēnei tuhinga ētahi tauira raruraru e pā ana ki ngā hihi gamma me ngā hihi-X, me ngā kōrero hei whakahōhonu ake i tō tātou māramatanga.
1. Te Mārama ki ngā Hihi Kamā me ngā Hihi-X
Ngā hihi gamma
Ko ngā hihi gamma he momo irahiko hikohiko e puta mai ana i te pirau irahiko i roto i ngā karihi ngota. He tino teitei te auau o tēnei irahiko, neke atu i te 10^19 Hz, ā, he poto rawa te roangaru, iti iho i te 10 pikomita. He tino teitei te kaha o ngā hihi gamma ki te wero, ā, ka taea te wero i ngā paparanga matotoru rawa o te rauemi.
X-ray
Ko ngā hihi-X, i tētahi atu taha, ka puta mai i ngā whakawhiti irahiko i roto i ngā ngota, inā koa ka whakakapia ngā irahiko mai i ngā anga o roto e ngā irahiko mai i ngā anga o waho e heke iho ana ki te tango i tō rātou tūranga. Ko te auau o ngā hihi-X kei waenga i te 10^16 Hz ki te 10^21 Hz, me ngā roangaru i waenga i te 0.01 nm me te 10 nm. He whānuitia te whakamahinga o ngā hihi-X i roto i te whakaahua X-ray hauora me te whakaahua tioata hihi-X.
2. Ngā Tauira Pātai me ngā Kōrerorero
Tauira Pātai 1: Pūngao Hihi Kama
Pātai:
Ko te roangaru o te hihi o ngā hihi gamma he 0.01 nm. Tātaihia te pūngao photon o te hihi gamma. (Whakamahia te pūmau a Planck h = 6.626 x 10^-34 Js me te tere o te mārama c = 3 x 10^8 m/s).
Kōrero:
Ka taea te tatau i te pūngao photon mā te whakamahi i te tātai:
\[ E = \frac{h \cdot c}{\lambda} \]
E mōhiotia ana:
– Roangaru (λ) = 0.01 nm = 0.01 x 10^-9 m = 10^-11 m
– Te pūmau a Planck (h) = 6.626 x 10^-34 Js
– Te tere o te mārama (c) = 3 x 10^8 m/s
\[ E = \frac{6.626 \times 10^{-34} \times 3 \times 10^8}{10^{-11}} \]
\[ E = \frac{19.878 \times 10^{-26}}{10^{-11}} \]
\[ E = 1.9878 \times 10^{-14} \text{J} \]
Nō reira, ko te pūngao o te photon hihi gamma he 1.9878 x 10^-14 J.
Tauira Pātai 2: Te Ngongo o te Hihi-X
Pātai:
E 70% o te kaha o ngā hihi-X e rere ana i roto i tētahi rauemi ka mimitihia. Mēnā ko te kaha tīmatanga o ngā hihi-X he 5 W/m^2, he aha te kaha o ngā hihi-X i muri i te rerenga i roto i te rauemi?
Kōrero:
Ka taea te tatau i te kaha whakamutunga o ngā hihi-X (\(I_{final}\)) mā te tango i te kaha i mimitihia e te rauemi mai i te kaha tīmatanga (\(I_{initial}\)).
\[ I_{whakamutunga} = I_{tīmatanga} – (I_{tīmatanga} \times \text{ōrau mimiti}) \]
\[ I_{end} = 5 \, \text{W/m}^2 – (5 \, \text{W/m}^2 \times 0.70) \]
\[ I_{end} = 5 \, \text{W/m}^2 – 3.5 \, \text{W/m}^2 \]
\[ I_{end} = 1.5 \, \text{W/m}^2 \]
Nō reira, ko te kaha o ngā hihi-X i muri i te whitinga i roto i te rauemi he 1.5 W/m^2.
Tauira Pātai 3: Te Whakataurite i te Whakaurunga o te Hihi Gamma me te Hihi-X
Pātai:
Mena ko te kaha o ngā hihi gamma me ngā hihi-X he 1 MeV me te 100 keV, ko tēhea te mea ka pai ake te uru ki ngā rauemi totoka, ā, he aha ai?
Kōrero:
Ko te kaha o te uruhanga o te irahiko hikohiko ki roto i tētahi rauemi e whakawhirinaki ana ki te kaha o ōna photon. Ka nui ake te kaha o te photon, ka nui ake tōna kaha ki te uru ki roto i te rauemi.
– Pūngao hihi gamma: 1 MeV (1 MeV = 1 x 10^6 eV)
– Pūngao hihi-X: 100 keV (100 keV = 100 x 10^3 eV)
He nui ake te 1 MeV i te 100 keV, nō reira he nui ake te pūngao o ngā hihi gamma i ngā hihi-X. Nō reira, he pai ake te kaha o ngā hihi gamma ki te uru ki ngā rauemi totoka i ngā hihi-X.
Tauira Pātai 4: Te Whakamahinga o ngā Hihi Kamā i roto i te Rongoā
Pātai:
I roto i te rongoā irahiko matepukupuku, ka tukuna ngā hihi gamma i tētahi kaha horopeta motuhake ki te kiko e pāngia ana. Mena ko te kaha horopeta e hiahiatia ana ko 2 Grays (Gy) ā, ko te rerenga hihi gamma he 0.4 Gy/min, kia pēhea te roa o te maimoatanga?
Kōrero:
Hei whakatau i te roa o te maimoatanga, ka taea e tātou te whakamahi i te whanaungatanga i waenga i te horopeta katoa, te rere o te horopeta, me te wā.
\[ \text{Horopeta katoa} = \text{Rerenga horopeta} \times \text{Wā} \]
\[ 2 \, \text{Gy} = 0.4 \, \text{Gy/min} \times \text{Wā} \]
Na, ko te roa o te maimoatanga ko:
\[ \text{Wā} = \frac{2 \, \text{Gy}}{0.4 \, \text{Gy/min}} \]
\[ \text{Wā} = 5 \, \text{meneti} \]
Na, me mahi te maimoatanga mō te 5 meneti.
Tauira Pātai 5: Te Whakamahinga o ngā Hiko-X i roto i te Whakaahua Hauora
Pātai:
I roto i te whakaahua hihi-X, ka tukuna e te tuku hihi-X te irahiko mō te 0.1 hēkona ki tētahi mea, ā, ka puta he kiriata me tētahi kiato ahua. Mēnā ka tautuhia anō te tuku ki te tuku irahiko mō te 0.2 hēkona, ka pēhea te rerekētanga o te kiato ahua i runga i te kiriata?
Kōrero:
He rite tonu te matotoru o te ahua i runga i te kiriata hihi-X ki te nui o te irahiko e whiwhihia ana e te kiriata. Mā te whakarea i te wā whakaatu mai i te 0.1 hēkona ki te 0.2 hēkona, ka whakarea anō hoki te nui o te irahiko e whiwhihia ana.
Nō reira, ka rua te nui ake o te mātotoru o te atarangi i runga i te kiriata.
Te Katinga
Ko ngā hihi gamma me ngā hihi-X he momo hihi hikohiko tino kaha, he maha ngā whakamahinga i roto i ngā momo mara. Mā roto i ngā tauira me ngā kōrero i runga ake nei, kua kite tātou me pēhea te whakamahi i ēnei ariā taketake o te ahupūngao hihi i roto i ngā tātaitanga mahi me ngā whakamahinga o ia rā pērā i te radiotherapy matepukupuku me te whakaahua hauora.
Mā te mārama pai ki ngā tikanga mahi me ngā āhuatanga o ēnei momo irahiko e rua ka āwhina i a tātou ki te whakamahi pai ake i ngā hangarau e pā ana, me te whakapai ake i te kounga o te oranga me te hauora tūmatanui mā roto i ngā tono hauora auaha.
