{"id":10909,"date":"2021-11-22T17:32:00","date_gmt":"2021-11-22T10:32:00","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=10909"},"modified":"2021-11-22T18:19:45","modified_gmt":"2021-11-22T11:19:45","slug":"lam-the-nao-de-xac-dinh-duoc-nien-dai-cua-do-gom-da-duoc-khai-quat","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/lam-the-nao-de-xac-dinh-duoc-nien-dai-cua-do-gom-da-duoc-khai-quat\/","title":{"rendered":"L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c ni\u00ean \u0111\u1ea1i c\u1ee7a \u0111\u1ed3 g\u1ed1m \u0111\u00e3 \u0111\u01b0\u1ee3c khai qu\u1eadt?"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u1ede c\u00e1c n\u01a1i khai qu\u1eadt \u0111\u01b0\u1ee3c \u0111\u1ed3 g\u1ed1m th\u01b0\u1eddng c\u00f3 m\u1ed9t \u00edt m\u1ea3nh g\u1ed7 b\u1ecb than h\u00f3a ho\u1eb7c m\u1ed9t \u00edt tro than g\u1ed7. Ngo\u00e0i ra trong c\u00e1c ng\u00f4i m\u1ed9 x\u00e2y b\u1eb1ng v\u1ecf s\u00f2 th\u01b0\u1eddng c\u00f3 v\u1ecf s\u00f2, khi khai qu\u1eadt \u0111\u1ed3 g\u1ed1m \u0111\u1ed3ng th\u1eddi c\u0169ng khai qu\u1eadt \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 x\u01b0\u01a1ng \u0111\u1ed9ng v\u1eadt. C\u00e1c nh\u00e0 kh\u1ea3o c\u1ed5 c\u00f3 kinh nghi\u1ec7m kh\u00f4ng ch\u1ec9 \u0111o v\u00e0 ph\u00e1t hi\u1ec7n l\u01b0\u1ee3ng cacbon trong tro v\u00e0 c\u00e1c m\u1ea3nh g\u1ed7 c\u00f3 trong ph\u1ea9n m\u1ed9 m\u00e0 c\u00f2n \u0111o h\u00e0m l\u01b0\u1ee3ng c\u00e1c bon \u1edf d\u1ea1ng h\u1ee3p ch\u1ea5t canxi c\u00e1cbon trong x\u01b0\u01a1ng \u0111\u1ed9ng v\u1eadt v\u00e0 v\u1ecf s\u00f2.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong h\u00e0m l\u01b0\u1ee3ng c\u00e1cbon c\u00f3 c\u00e1c nguy\u00ean t\u1eed c\u00e1c bon c\u00f3 nguy\u00ean t\u1eed l\u01b0\u1ee3ng kh\u00e1c nhau (c\u00e1c \u0111\u1ed3ng v\u1ecb c\u00e1c bon 12, 13, 14). Nguy\u00ean t\u1eed cacbon c\u00f3 kh\u1ed1i l\u01b0\u1ee3ng nguy\u00ean t\u1eed b\u1eb1ng 14 \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 \u0111\u1ed3ng v\u1ecb ph\u00f3ng x\u1ea1 C14 . C\u00e1c bon ph\u00f3ng x\u1ea1 tr\u1ea3i qua th\u1eddi gian s\u1ebd d\u1ea9n d\u1ea9n bi\u1ebfn th\u00e0nh nguy\u00ean t\u1eed nit\u01a1. Th\u1eddi gian \u0111\u1ec3 l\u01b0\u1ee3ng nguy\u00ean t\u1eed c\u00e1c bon C14 c\u00f2n m\u1ed9t n\u1eeda l\u01b0\u1ee3ng ban \u0111\u1ea9u l\u00e0 5730+40 n\u0103m (c\u00f2n g\u1ecdi l\u00e0 chu k\u1ef3 b\u00e1n r\u00e3 hay chu k\u1ef3 t\u00e1n hu\u1ef7). Do v\u1eady ch\u1ec9 c\u1ea9n \u0111o t\u00ednh ph\u00f3ng x\u1ea1 c\u1ee7a C14 c\u00f3 trong g\u1ed7, trong v\u1ecf s\u00f2 khai qu\u1eadt \u0111\u01b0\u1ee3c, ng\u01b0\u1eddi ta c\u00f3 th\u1ec3 bi\u1ebft \u0111\u01b0\u1ee3c ni\u00ean \u0111\u1ea1i c\u1ee5 th\u1ec3 c\u1ee7a ch\u00fang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5 \u1edf Nh\u1eadt B\u1ea3n , \u0111\u1ed3 g\u1ed1m \u0111\u00e0o \u0111\u01b0\u1ee3c \u1edf huy\u1ec7n Catagawa c\u00f3 ni\u00ean \u0111\u1ea1i s\u1edbm nh\u1ea5t 9450+40 n\u0103m v\u1ec1 tr\u01b0\u1edbc, tr\u01b0\u1edbc \u0111\u00e2y, ng\u01b0\u1eddi ta cho r\u1eb1ng d\u01b0 ch\u1ec9 \u1edf huy\u1ec7n Shiba c\u00f3 ni\u00ean \u0111\u1ea1i 5100+40 n\u0103m nh\u01b0ng t\u00ednh theo ph\u01b0\u01a1ng ph\u00e1p \u0111o cacbon ph\u00f3ng xa ni\u00ean \u0111\u1ea1i c\u1ee7a d\u01b0 ch\u1ec9 n\u00e0y l\u00e0 kho\u1ea3ng 1950 n\u0103m.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u1ede c\u00e1c n\u01a1i khai qu\u1eadt \u0111\u01b0\u1ee3c \u0111\u1ed3 g\u1ed1m th\u01b0\u1eddng c\u00f3 m\u1ed9t \u00edt m\u1ea3nh g\u1ed7 b\u1ecb than h\u00f3a ho\u1eb7c m\u1ed9t \u00edt tro than g\u1ed7. Ngo\u00e0i ra trong c\u00e1c ng\u00f4i m\u1ed9 x\u00e2y b\u1eb1ng v\u1ecf s\u00f2 th\u01b0\u1eddng c\u00f3 v\u1ecf s\u00f2, khi khai qu\u1eadt \u0111\u1ed3 g\u1ed1m \u0111\u1ed3ng th\u1eddi c\u0169ng khai qu\u1eadt \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 x\u01b0\u01a1ng \u0111\u1ed9ng v\u1eadt. C\u00e1c nh\u00e0 [&hellip;]<\/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":[1,15],"tags":[],"class_list":["post-10909","post","type-post","status-publish","format-standard","hentry","category-general","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10909","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=10909"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/10909\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=10909"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=10909"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=10909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}