{"id":5608,"date":"2016-05-31T17:16:26","date_gmt":"2016-05-31T10:16:26","guid":{"rendered":"http:\/\/ttud.com.vn\/?p=5608"},"modified":"2017-10-03T08:48:44","modified_gmt":"2017-10-03T01:48:44","slug":"cac-nha-vat-ly-hungary-tim-thay-dau-hieu-ve-su-ton-tai-cua-luc-co-ban-thu-nam","status":"publish","type":"post","link":"https:\/\/casta.ttud.com.vn\/index.php\/cac-nha-vat-ly-hungary-tim-thay-dau-hieu-ve-su-ton-tai-cua-luc-co-ban-thu-nam\/","title":{"rendered":"C\u00e1c nh\u00e0 v\u1eadt l\u00fd Hungary t\u00ecm th\u1ea5y d\u1ea5u hi\u1ec7u v\u1ec1 s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a l\u1ef1c c\u01a1 b\u1ea3n th\u1ee9 n\u0103m"},"content":{"rendered":"

Ch\u00fang ta \u0111\u1ec1u bi\u1ebft t\u1ed3n t\u1ea1i 4 l\u1ef1c c\u01a1 b\u1ea3n c\u1ee7a t\u1ef1 nhi\u00ean: l\u1ef1c h\u1ea5p d\u1eabn, l\u1ef1c \u0111i\u1ec7n t\u1eeb, l\u1ef1c h\u1ea1t nh\u00e2n m\u1ea1nh v\u00e0 l\u1ef1c h\u1ea1t nh\u00e2n y\u1ebfu. Nh\u01b0ng c\u00f3 th\u1ec3 v\u1eabn c\u00f2n c\u00f3 m\u1ed9t l\u1ef1c c\u01a1 b\u1ea3n th\u1ee9 5 ch\u01b0a \u0111\u01b0\u1ee3c kh\u00e1m ph\u00e1? M\u1ed9t th\u00ed nghi\u1ec7m th\u1ef1c hi\u1ec7n g\u1ea7n \u0111\u00e2y \u1edf Hungary cho th\u1ea5y kh\u1ea3 n\u0103ng n\u00e0y kh\u00f4ng ph\u1ea3i ho\u00e0n to\u00e0n kh\u00f4ng c\u00f3. M\u1ed9t nh\u00f3m c\u00e1c nh\u00e0 v\u1eadt l\u00fd d\u1eabn \u0111\u1ea7u b\u1edfi Attila Krasznahorkay \u0111\u1ebfn t\u1eeb Vi\u1ec7n h\u00e0n l\u00e2m Khoa h\u1ecdc Hungary \u0111\u00e3 xu\u1ea5t b\u1ea3n m\u1ed9t b\u00e0i b\u00e1o kh\u00e1 khi\u00eau kh\u00edch v\u00e0o cu\u1ed1i n\u0103m ngo\u00e1i tr\u00ean t\u1ea1p ch\u00ed Physical Review Letters, tuy\u00ean b\u1ed1 r\u1eb1ng m\u1ed9t ki\u1ec3u ph\u00e2n r\u00e3 ph\u00f3ng x\u1ea1 b\u1ea5t th\u01b0\u1eddng ch\u00ednh l\u00e0 d\u1ea5u hi\u1ec7u cho th\u1ea5y s\u1ef1 t\u1ed3n t\u1ea1i c\u1ee7a m\u1ed9t l\u1ef1c c\u01a1 b\u1ea3n ch\u01b0a x\u00e1c \u0111\u1ecbnh.<\/strong><\/p>\n

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M\u1eb7c d\u00f9 \u0111\u01b0a ra m\u1ed9t tuy\u00ean b\u1ed1 kh\u00f3 tin, b\u00e0i b\u00e1o c\u1ee7a h\u1ecd \u0111\u00e3 ch\u00ecm v\u00e0o qu\u00ean l\u00e3ng, m\u00e3i cho \u0111\u1ebfn khi nh\u00e0 v\u1eadt l\u00fd h\u1ecdc Jonathan Feng v\u00e0 c\u00e1c \u0111\u1ed3ng nghi\u1ec7p c\u1ee7a \u00f4ng t\u1ea1i \u0110\u1ea1i h\u1ecdc California (M\u1ef9) quy\u1ebft \u0111\u1ecbnh t\u00ecm hi\u1ec3u k\u1ef9 h\u01a1n v\u00e0 nh\u1eadn th\u1ea5y c\u00e1c nh\u00e0 khoa h\u1ecdc Hungary \u0111\u00e3 kh\u00f4ng sai. Th\u1ebf gi\u1edbi v\u1eadt l\u00fd hi\u1ec7n nay \u0111\u1ea7y r\u1eaby nh\u1eefng kh\u1ea3 n\u0103ng v\u1ec1 s\u1ef1 c\u00f3 m\u1eb7t c\u1ee7a m\u1ed9t l\u1ef1c c\u01a1 b\u1ea3n ch\u01b0a \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn. Nh\u1eefng suy \u0111o\u00e1n v\u1ec1 l\u1ef1c th\u1ee9 5 n\u00e0y \u0111\u00e3 t\u1ed3n t\u1ea1i trong nhi\u1ec1u n\u0103m qua, m\u1ed9t ph\u1ea7n do s\u1ef1 b\u1ea5t l\u1ef1c c\u1ee7a m\u00f4 h\u00ecnh chu\u1ea9n c\u1ee7a v\u1eadt l\u00fd h\u1ea1t, trong vi\u1ec7c \u0111\u01b0a ra l\u1eddi gi\u1ea3i th\u00edch r\u00f5 r\u00e0ng nh\u1ea5t \u0111\u1ed1i v\u1edbi v\u1eadt ch\u1ea5t t\u1ed1i – thu\u1eadt ng\u1eef d\u00f9ng \u0111\u1ec3 ch\u1ec9 th\u1ee9 v\u1eadt ch\u1ea5t gi\u1ea3 thuy\u1ebft, bao g\u1ed3m m\u1ed9t ph\u1ea7n r\u1ea5t l\u1edbn kh\u1ed1i l\u01b0\u1ee3ng v\u00e0 n\u0103ng l\u01b0\u1ee3ng c\u00f3 trong v\u0169 tr\u1ee5.<\/p>\n

Tr\u00ean th\u1ef1c t\u1ebf, c\u00e1c nh\u00e0 khoa h\u1ecdc Hungary \u0111\u00e3 t\u00ecm ra c\u00e1i g\u1ecdi l\u00e0 \u201cphoton t\u1ed1i\u201d, khi h\u1ecd \u0111ang th\u1ef1c hi\u1ec7n m\u1ed9t vi\u1ec7c kh\u00e1c. Trong th\u00ed nghi\u1ec7m c\u1ee7a m\u00ecnh, c\u00e1c nh\u00e0 nghi\u00ean c\u1ee9u \u0111\u00e3 b\u1eafn proton v\u00e0o m\u1ed9t b\u1ea3n m\u1ecfng lithium. Khi h\u1ea5p th\u1ee5 proton, h\u1ea1t nh\u00e2n lithium tr\u1edf n\u00ean kh\u00f4ng b\u1ec1n v\u00e0 bi\u1ebfn th\u00e0nh m\u1ed9t phi\u00ean b\u1ea3n berili kh\u00f4ng \u1ed5n \u0111\u1ecbnh, \u2018phun ra\u2019 c\u00e1c c\u1eb7p electron v\u00e0 positron (ph\u1ea3n h\u1ea1t c\u1ee7a electron). Khi c\u00e1c proton \u0111\u1eadp v\u00e0o lithium \u1edf g\u00f3c ch\u00ednh x\u00e1c 140 \u0111\u1ed9, nhi\u1ec1u electron v\u00e0 positron s\u1ea3n sinh h\u01a1n so v\u1edbi d\u1ef1 ki\u1ebfn. Krasznahorkay v\u00e0 c\u00e1c c\u1ed9ng s\u1ef1 c\u1ee7a \u00f4ng \u0111\u01b0a ra gi\u1ea3 thuy\u1ebft r\u1eb1ng ph\u1ea7n d\u01b0 n\u00e0y \u0111\u1ebfn t\u1eeb m\u1ed9t h\u1ea1t m\u1edbi n\u1eb7ng h\u01a1n 34 l\u1ea7n electron, d\u1ea5u hi\u1ec7u cho th\u1ea5y s\u1ef1 g\u00f3p m\u1eb7t c\u1ee7a m\u1ed9t l\u1ef1c ch\u01b0a \u0111\u01b0\u1ee3c kh\u00e1m ph\u00e1.<\/p>\n

Khi Nature \u0111\u0103ng t\u1ea3i b\u00e0i vi\u1ebft v\u1ec1 s\u1ef1 vi\u1ec7c tr\u00ean, ch\u1eafc ch\u1eafn s\u1ebd xu\u1ea5t hi\u1ec7n kh\u00f4ng \u00edt nh\u1eefng ho\u00e0i nghi c\u0169ng nh\u01b0 s\u1ef1 ph\u1ea5n kh\u00edch v\u1ec1 k\u1ebft qu\u1ea3 th\u1eed nghi\u1ec7m. C\u00e1c nh\u00e0 v\u1eadt l\u00fd v\u1eabn \u0111ang suy ngh\u0129 theo nh\u1eefng c\u00e1ch kh\u00e1c nhau \u0111\u1ec3 xem x\u00e9t ph\u00e1t hi\u1ec7n th\u00fa v\u1ecb n\u00e0y. Trong khi \u0111\u00f3, nh\u1eefng nh\u00e0 nghi\u00ean c\u1ee9u t\u1ea1i M\u00e1y gia t\u1ed1c qu\u1ed1c gia Thomas Jefferson v\u00e0 c\u00e1c nh\u00f3m chuy\u00ean gia kh\u00e1c \u1edf Hoa K\u1ef3 v\u00e0 ch\u00e2u \u00c2u, hi\u1ec7n c\u0169ng \u0111ang l\u00e0m vi\u1ec7c \u0111\u1ec3 hi\u1ec3u r\u00f5 v\u1ea5n \u0111\u1ec1. H\u1ecd hy v\u1ecdng c\u00f3 th\u1ec3 \u0111\u01b0a ra k\u1ebft lu\u1eadn cu\u1ed1i c\u00f9ng, ho\u1eb7c x\u00e1c nh\u1eadn, ho\u1eb7c l\u00e0 h\u1ee7y b\u1ecf k\u1ebft qu\u1ea3 th\u00ed nghi\u1ec7m c\u1ee7a Hungary trong v\u00f2ng 1 n\u0103m.<\/p>\n

Tham kh\u1ea3o: Nature, \u1ea2nh: Sciencealert\u200b<\/em><\/strong><\/p>\n

Ngu\u1ed3n tinhte.vn<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Ch\u00fang ta \u0111\u1ec1u bi\u1ebft t\u1ed3n t\u1ea1i 4 l\u1ef1c c\u01a1 b\u1ea3n c\u1ee7a t\u1ef1 nhi\u00ean: l\u1ef1c h\u1ea5p d\u1eabn, l\u1ef1c \u0111i\u1ec7n t\u1eeb, l\u1ef1c h\u1ea1t nh\u00e2n m\u1ea1nh v\u00e0 l\u1ef1c h\u1ea1t nh\u00e2n y\u1ebfu. Nh\u01b0ng c\u00f3 th\u1ec3 v\u1eabn c\u00f2n c\u00f3 m\u1ed9t l\u1ef1c c\u01a1 b\u1ea3n th\u1ee9 5 ch\u01b0a \u0111\u01b0\u1ee3c kh\u00e1m ph\u00e1? M\u1ed9t th\u00ed nghi\u1ec7m th\u1ef1c hi\u1ec7n g\u1ea7n \u0111\u00e2y \u1edf Hungary cho th\u1ea5y […]<\/p>\n","protected":false},"author":17,"featured_media":6219,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[47],"tags":[],"class_list":["post-5608","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/5608","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/comments?post=5608"}],"version-history":[{"count":3,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/5608\/revisions"}],"predecessor-version":[{"id":6220,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/posts\/5608\/revisions\/6220"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media\/6219"}],"wp:attachment":[{"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/media?parent=5608"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/categories?post=5608"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casta.ttud.com.vn\/index.php\/wp-json\/wp\/v2\/tags?post=5608"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}