“Ch\u00e1u mu\u1ed1n tr\u1edf th\u00e0nh n\u1eef ti\u1ebfp vi\u00ean h\u00e0ng kh\u00f4ng nh\u01b0ng nghe n\u00f3i bay tr\u00ean cao d\u1ec5 b\u1ecb nhi\u1ec5m ph\u00f3ng x\u1ea1. Xin gi\u1ea3i th\u00edch r\u00f5 \u0111i\u1ec1u n\u00e0y v\u00e0 nh\u1eefng v\u1ea5n \u0111\u1ec1 kh\u00e1c li\u00ean quan \u0111\u1ebfn s\u1ee9c kh\u1ecfe trong c\u00e1c chuy\u1ebfn bay xa”.<\/p>\n\n\n\n
M\u1ed7i ng\u01b0\u1eddi s\u1ed1ng tr\u00ean m\u1eb7t \u0111\u1ea5t h\u1eb1ng n\u0103m h\u1ea5p thu m\u1ed9t li\u1ec1u ph\u00f3ng x\u1ea1 kho\u1ea3ng 1 milisiviert (1 mSv) do ph\u1ea3i th\u01b0\u1eddng xuy\u00ean ti\u1ebfp x\u00fac v\u1edbi c\u00e1c b\u1ee9c x\u1ea1 ion h\u00f3a t\u1eeb v\u0169 tr\u1ee5, t\u1eeb c\u00e1c \u0111\u1ed3ng v\u1ecb ph\u00f3ng x\u1ea1 hi\u1ec7n h\u1eefu trong kh\u00f4ng kh\u00ed, n\u01b0\u1edbc, \u0111\u1ea5t\u2026(trong \u0111\u00f3, ph\u1ea7n t\u1eeb v\u0169 tr\u1ee5 chi\u1ebfm h\u01a1n 1\/4).<\/p>\n\n\n\n
C\u00e0ng l\u00ean cao, b\u1ee9c x\u1ea1 c\u00e0ng l\u1edbn. \u1ede \u0111\u1ed9 cao 6.000-8.000 m, b\u1ee9c x\u1ea1 t\u0103ng t\u1edbi 55-70 l\u1ea7n. Do \u0111\u00f3, c\u00e0ng bay cao, bay l\u00e2u, con ng\u01b0\u1eddi c\u00e0ng ph\u1ea3i h\u1ea5p thu li\u1ec1u ph\u00f2ng x\u1ea1 l\u1edbn h\u01a1n. Ch\u1ec9 tr\u00ean m\u1ed9t chuy\u1ebfn bay trong 12 gi\u1edd t\u1eeb Paris \u0111i Tokyo, m\u1ed7i h\u00e0nh kh\u00e1ch \u0111\u00e3 ph\u1ea3i h\u1ea5p thu 0,20-0,25 mSv. Theo T\u1ed5 ch\u1ee9c ph\u00f2ng v\u1ec7 ph\u00f3ng x\u1ea1 th\u1ebf gi\u1edbi, li\u1ec1u h\u1ea5p thu ph\u00f3ng x\u1ea1 cho ph\u00e9p h\u1eb1ng n\u0103m c\u1ee7a ng\u01b0\u1eddi b\u00ecnh th\u01b0\u1eddng l\u00e0 1 mSv, c\u1ee7a ng\u01b0\u1eddi l\u00e0m ngh\u1ec1 c\u00f3 li\u00ean quan \u0111\u1ebfn ph\u00f3ng x\u1ea1 l\u00e0 20 mSv.<\/p>\n\n\n\n
M\u1ed9t c\u00f4ng tr\u00ecnh nghi\u00ean c\u1ee9u t\u1ea1i \u0110\u1ee9c cho th\u1ea5y, c\u00e1c phi c\u00f4ng v\u00e0 ti\u1ebfp vi\u00ean h\u00e0ng kh\u00f4ng th\u00e2m ni\u00ean c\u1ee7a n\u01b0\u1edbc n\u00e0y c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng bi\u1ebfn \u0111\u1ed5i b\u1ea5t th\u01b0\u1eddng \u1edf nhi\u1ec5m s\u1eafc th\u1ec3, gi\u1ed1ng nh\u01b0 \u1edf ng\u01b0\u1eddi nhi\u1ec5m x\u1ea1. So v\u1edbi nh\u1eefng ng\u01b0\u1eddi l\u00e0m vi\u1ec7c trong nh\u00e0 m\u00e1y \u0111i\u1ec7n nguy\u00ean t\u1eed, h\u1ecd h\u1ea5p thu m\u1ed9t li\u1ec1u b\u1ee9c x\u1ea1 cao g\u1ea5p 5 l\u1ea7n.<\/p>\n\n\n\n
C\u0169ng theo c\u00f4ng tr\u00ecnh tr\u00ean, khi xem x\u00e9t 23 tri\u1ec7u h\u00e0nh kh\u00e1ch c\u1ee7a H\u00e3ng h\u00e0ng kh\u00f4ng Lufthansa, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u th\u1ea5y trung b\u00ecnh m\u1ed7i n\u0103m c\u00f3 kho\u1ea3ng 140 ng\u01b0\u1eddi ch\u1ebft v\u00ec ung th\u01b0 do nhi\u1ec5m x\u1ea1, m\u1ed9t con s\u1ed1 cao h\u01a1n t\u1eed vong v\u00ec tai n\u1ea1n m\u00e1y bay.<\/p>\n\n\n\n
Nh\u01b0 v\u1eady, kh\u00f4ng ch\u1ec9 phi c\u00f4ng v\u00e0 ti\u1ebfp vi\u00ean h\u00e0ng kh\u00f4ng m\u00e0 c\u1ea3 nh\u1eefng kh\u00e1ch h\u00e0ng th\u01b0\u1eddng xuy\u00ean c\u1ee7a c\u00e1c h\u00e3ng h\u00e0ng kh\u00f4ng c\u0169ng ph\u1ea3i h\u1ea5p thu m\u1ed9t li\u1ec1u b\u1ee9c x\u1ea1 l\u1edbn h\u01a1n nhi\u1ec1u so v\u1edbi khi \u1edf tr\u00ean m\u1eb7t \u0111\u1ea5t.<\/p>\n\n\n\n
\u0110\u00f3 l\u00e0 ch\u01b0a k\u1ec3 \u0111\u1ebfn tr\u01b0\u1eddng h\u1ee3p h\u1ea5p thu ph\u00f3ng x\u1ea1 khi ti\u1ebfn h\u00e0nh ki\u1ec3m tra h\u00e0nh l\u00fd b\u1eb1ng tia X, s\u1eed d\u1ee5ng c\u00e1c ngu\u1ed3n b\u1ee9c x\u1ea1 gamma do y\u00eau c\u1ea7u c\u1ee7a thi\u1ebft b\u1ecb k\u1ef9 thu\u1eadt, hay v\u1eadn chuy\u1ec3n tr\u00e1i ph\u00e9p c\u00e1c ngu\u1ed3n ph\u00f3ng x\u1ea1\u2026 H\u00e0ng kh\u00f4ng, v\u00ec v\u1eady, kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t ng\u00e0nh “d\u1ec5 ch\u1ecbu” nh\u01b0 ta v\u1eabn t\u01b0\u1edfng khi ch\u1ec9 nh\u00ecn b\u1ed9 c\u00e1nh h\u1ea5p d\u1eabn c\u1ee7a ti\u1ebfp vi\u00ean, trang ph\u1ee5c s\u00e1ng ng\u1eddi c\u1ee7a phi c\u00f4ng, khi h\u00ecnh dung ra c\u1ea3nh phi\u00eau di\u00eau tr\u00ean ch\u00edn t\u1ea7ng m\u00e2y v\u00e0 s\u1ed1 l\u01b0\u01a1ng kha kh\u00e1.<\/p>\n\n\n\n
Khi ph\u1ea3i qua nhi\u1ec1u m\u00fai gi\u1edd, c\u01a1 th\u1ec3 ng\u01b0\u1eddi \u0111i m\u00e1y bay tr\u1ea3i qua nh\u1eefng thay \u0111\u1ed5i v\u1ec1 \u0111\u1ed3ng h\u1ed3 sinh h\u1ecdc, l\u00e0m \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn n\u00e3o. Gi\u1eefa n\u0103m 2001, m\u1ed9t nghi\u00ean c\u1ee9u c\u1ee7a Anh tr\u00ean ti\u1ebfp vi\u00ean nh\u1eefng chuy\u1ebfn bay qua h\u01a1n 7 m\u00fai gi\u1edd cho th\u1ea5y, \u1edf nh\u00f3m ch\u1ec9 \u0111\u01b0\u1ee3c ngh\u1ec9 5 ng\u00e0y gi\u1eefa hai chuy\u1ebfn bay, th\u00f9y th\u00e1i d\u01b0\u01a1ng ph\u1ea3i c\u1ee7a n\u00e3o b\u1ecb teo nh\u1ecf, k\u00e8m theo r\u1ed1i lo\u1ea1n ghi nh\u1edb v\u00e0 ti\u1ebfp nh\u1eadn; c\u00f2n nh\u00f3m ngh\u1ec9 14 ng\u00e0y v\u1eabn b\u00ecnh th\u01b0\u1eddng.<\/p>\n\n\n\n
Ngo\u00e0i ra, khi bay \u0111\u01b0\u1eddng d\u00e0i, nh\u1eefng ai ng\u1ed3i qu\u00e1 l\u00e2u m\u1ed9t ch\u1ed7 m\u00e0 kh\u00f4ng v\u1eadn \u0111\u1ed9ng s\u1ebd d\u1ec5 b\u1ecb vi\u00eam t\u1eafc t\u0129nh m\u1ea1ch chi d\u01b0\u1edbi, c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nguy c\u01a1 t\u1eafc huy\u1ebft, g\u00e2y t\u1eed vong.<\/p>\n","protected":false},"excerpt":{"rendered":"
“Ch\u00e1u mu\u1ed1n tr\u1edf th\u00e0nh n\u1eef ti\u1ebfp vi\u00ean h\u00e0ng kh\u00f4ng nh\u01b0ng nghe n\u00f3i bay tr\u00ean cao d\u1ec5 b\u1ecb nhi\u1ec5m ph\u00f3ng x\u1ea1. Xin gi\u1ea3i th\u00edch r\u00f5 \u0111i\u1ec1u n\u00e0y v\u00e0 nh\u1eefng v\u1ea5n \u0111\u1ec1 kh\u00e1c li\u00ean quan \u0111\u1ebfn s\u1ee9c kh\u1ecfe trong c\u00e1c chuy\u1ebfn bay xa”. M\u1ed7i ng\u01b0\u1eddi s\u1ed1ng tr\u00ean m\u1eb7t \u0111\u1ea5t h\u1eb1ng n\u0103m h\u1ea5p thu m\u1ed9t li\u1ec1u ph\u00f3ng x\u1ea1 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[21],"tags":[],"class_list":["post-11791","post","type-post","status-publish","format-standard","hentry","category-y-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/11791","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=11791"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/11791\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=11791"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=11791"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=11791"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}