{"id":1943,"date":"2018-08-28T15:14:40","date_gmt":"2018-08-28T08:14:40","guid":{"rendered":"http:\/\/vinatom.gov.vn\/?p=1943"},"modified":"2023-11-28T16:18:36","modified_gmt":"2023-11-28T09:18:36","slug":"seminar-khoa-hoc-tai-trung-tam-hat-nhan-thanh-pho-ho-chi-minh","status":"publish","type":"post","link":"https:\/\/vinatom.gov.vn\/seminar-khoa-hoc-tai-trung-tam-hat-nhan-thanh-pho-ho-chi-minh\/","title":{"rendered":"Seminar khoa h\u1ecdc t\u1ea1i Trung t\u00e2m H\u1ea1t nh\u00e2n Th\u00e0nh ph\u1ed1 H\u1ed3 Ch\u00ed Minh"},"content":{"rendered":"<p style=\"text-align: justify;\">Chi\u1ec1u ng\u00e0y 24\/08\/2018, Trung t\u00e2m H\u1ea1t nh\u00e2n Tp. H\u1ed3 Ch\u00ed Minh \u0111\u00e3 t\u1ed5 ch\u1ee9c seminar khoa h\u1ecdc v\u1ec1 <strong><em>M\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 t\u00ednh to\u00e1n m\u00f4 ph\u1ecfng h\u1ec7 th\u1ed1ng chum Positron ch\u1eadm s\u1eed d\u1ee5ng ch\u01b0\u01a1ng tr\u00ecnh Simion<\/em><\/strong>, do C\u1eed nh\u00e2n Cao Thanh Long, c\u00e1n b\u1ed9 Ph\u00f2ng V\u1eadt l\u00fd v\u00e0 Ph\u00e2n t\u00edch h\u1ea1t nh\u00e2n tr\u00ecnh b\u00e0y.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\">Tham d\u1ef1 seminar c\u00f3 c\u00e1c c\u00e1n b\u1ed9 nghi\u00ean c\u1ee9u c\u1ee7a Trung t\u00e2m H\u1ea1t nh\u00e2n Tp. H\u1ed3 Ch\u00ed Minh.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-13269\" src=\"http:\/\/tvdt.vinatom.gov.vn\/wp-content\/uploads\/2018\/08\/28.8.18.1.jpg\" alt=\"\" width=\"800\" height=\"558\" srcset=\"https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2018\/08\/28.8.18.1.jpg 800w, https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2018\/08\/28.8.18.1-300x209.jpg 300w, https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2018\/08\/28.8.18.1-150x105.jpg 150w, https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2018\/08\/28.8.18.1-768x536.jpg 768w, https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2018\/08\/28.8.18.1-100x70.jpg 100w, https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2018\/08\/28.8.18.1-696x485.jpg 696w, https:\/\/vinatom.gov.vn\/wp-content\/uploads\/2018\/08\/28.8.18.1-602x420.jpg 602w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p style=\"text-align: justify;\">Nh\u1eefng n\u1ed9i dung ch\u00ednh trong b\u00e1o c\u00e1o:<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\">Ph\u01b0\u01a1ng ph\u00e1p ph\u1ed5 k\u1ebf hu\u1ef7 c\u1eb7p positron (<strong>P<\/strong>ositron <strong>A<\/strong>nnihilation <strong>S<\/strong>pectroscopy \u2013 <strong>PAS<\/strong>) \u0111\u00f3ng vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c nghi\u00ean c\u1ee9u c\u00e1c d\u1ea1ng sai h\u1ecfng v\u1eadt li\u1ec7u, c\u1ea5u tr\u00fac nano c\u0169ng nh\u01b0 tr\u1ea1ng th\u00e1i kim lo\u1ea1i, t\u1ea1p ch\u1ea5t b\u00ean trong v\u1eadt li\u1ec7u. Do c\u00e1c ngu\u1ed3n positron \u0111\u1ed3ng v\u1ecb truy\u1ec1n th\u1ed1ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong ph\u01b0\u01a1ng ph\u00e1p PAS c\u00f3 \u0111\u1eb7c tr\u01b0ng ph\u00e1t positron v\u1edbi ph\u1ed5 ph\u00e2n b\u1ed1 n\u0103ng l\u01b0\u1ee3ng li\u00ean t\u1ee5c, ph\u01b0\u01a1ng ph\u00e1p n\u00e0y kh\u00f4ng cung c\u1ea5p \u0111\u01b0\u1ee3c nh\u1eefng th\u00f4ng tin chi ti\u1ebft v\u1ec1 c\u00e1c sai h\u1ecfng b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u n\u1eb1m \u1edf c\u00e1c \u0111\u1ed9 s\u00e2u kh\u00e1c nhau. \u0110\u1ec3 kh\u1eafc ph\u1ee5c nh\u01b0\u1ee3c \u0111i\u1ec3m tr\u00ean, c\u00e1c h\u1ec7 th\u1ed1ng ch\u00f9m positron ch\u1eadm (Slow positron beam system) \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o v\u00e0 \u0111\u01b0a v\u00e0o ho\u1ea1t \u0111\u1ed9ng t\u1ea1i m\u1ed9t s\u1ed1 Vi\u1ec7n nghi\u00ean c\u1ee9u, ph\u00f2ng th\u00ed nghi\u1ec7m v\u00e0 c\u00e1c Tr\u01b0\u1eddng \u0110\u1ea1i h\u1ecdc l\u1edbn \u1edf c\u00e1c n\u01b0\u1edbc ph\u00e1t tri\u1ec3n nh\u1eb1m m\u1ee5c \u0111\u00edch t\u1ea1o ra c\u00e1c ch\u00f9m positron \u0111\u01a1n n\u0103ng c\u00f3 n\u0103ng l\u01b0\u1ee3ng th\u1ea5p v\u00e0 c\u00f3 th\u1ec3 thay \u0111\u1ed5i \u0111\u01b0\u1ee3c n\u0103ng l\u01b0\u1ee3ng \u0111\u1ec3 ph\u1ee5c v\u1ee5 cho c\u00e1c nghi\u00ean c\u1ee9u c\u1ea7n thi\u1ebft. C\u00e1c h\u1ec7 th\u1ed1ng n\u00e0y m\u1eb7c d\u00f9 c\u00f3 c\u00e1c thi\u1ebft k\u1ebf kh\u00e1c nhau nh\u01b0ng v\u1eabn tu\u00e2n theo m\u1ed9t nguy\u00ean l\u00fd ho\u1ea1t \u0111\u1ed9ng chung. M\u1ed9t t\u1ec9 l\u1ec7 c\u00e1c positron c\u00f3 n\u0103ng l\u01b0\u1ee3ng cao ph\u00e1t ra t\u1eeb ngu\u1ed3n ph\u00e1t \u0111\u01b0\u1ee3c l\u00e0m ch\u1eadm \u0111\u1ec3 tr\u1edf th\u00e0nh c\u00e1c positron ch\u1eadm c\u00f3 n\u0103ng l\u01b0\u1ee3ng th\u1ea5p (v\u00e0i eV) v\u00e0 t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u01a1n n\u0103ng. C\u00e1c positron ch\u1eadm sau \u0111\u00f3 \u0111\u01b0\u1ee3c gia t\u1ed1c nh\u1eb9 nh\u1edd b\u1ed9 ph\u1eadn ti\u1ec1n gia t\u1ed1c v\u00e0 \u0111\u01b0\u1ee3c d\u1eabn qua m\u1ed9t b\u1ed9 ph\u1eadn l\u1ecdc n\u0103ng l\u01b0\u1ee3ng \u0111\u1ec3 gi\u1eef l\u1ea1i c\u00e1c h\u1ea1t positron c\u00f3 n\u0103ng l\u01b0\u1ee3ng th\u1ea5p v\u00e0 \u0111\u01a1n n\u0103ng ra kh\u1ecfi ch\u00f9m tia. Ch\u00f9m positron ch\u1eadm t\u01b0\u01a1ng \u0111\u1ed1i \u0111\u01a1n n\u0103ng sau khi \u0111\u01b0\u1ee3c l\u1ecdc ra kh\u1ecfi ch\u00f9m tia ban \u0111\u1ea7u ti\u1ebfp t\u1ee5c \u0111\u01b0\u1ee3c d\u1eabn qua m\u1ed9t b\u1ed9 ph\u1eadn gia t\u1ed1c \u0111\u1ec3 \u0111\u01b0\u1ee3c gia t\u1ed1c \u0111\u1ebfn m\u1ed9t m\u1ee9c n\u0103ng l\u01b0\u1ee3ng c\u1ea7n thi\u1ebft v\u00e0 \u0111\u01b0\u1ee3c d\u1eabn \u0111\u1ebfn bu\u1ed3ng ch\u1ee9a m\u1eabu \u0111\u1ec3 b\u1eafn ph\u00e1 b\u1ec1 m\u1eb7t c\u1ee7a v\u1eadt li\u1ec7u c\u1ea7n kh\u1ea3o s\u00e1t.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\">Trung t\u00e2m H\u1ea1t nh\u00e2n Th\u00e0nh ph\u1ed1 H\u1ed3 Ch\u00ed Minh \u0111\u00e3 b\u01b0\u1edbc \u0111\u1ea7u \u00e1p d\u1ee5ng c\u00e1c ph\u01b0\u01a1ng ph\u00e1p PAS bao g\u1ed3m ph\u01b0\u01a1ng ph\u00e1p \u0111o th\u1eddi gian s\u1ed1ng positron v\u00e0 gi\u00e3n n\u1edf Doppler \u0111\u1ec3 nghi\u00ean c\u1ee9u m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t v\u1eadt li\u1ec7u kim lo\u1ea1i, \u1ed1ng nano carbon, zeolite v\u00e0 \u0111\u00e3 c\u00f3 \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 nh\u1ea5t \u0111\u1ecbnh. Tuy nhi\u00ean ngu\u1ed3n ph\u00e1t positron ch\u1ee7 y\u1ebfu \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng l\u00e0 ngu\u1ed3n Na<sup>22<\/sup> c\u00f3 ph\u1ed5 n\u0103ng l\u01b0\u1ee3ng r\u1ed9ng, g\u00e2y h\u1ea1n ch\u1ebf r\u1ea5t l\u1edbn \u0111\u1ed1i v\u1edbi c\u00e1c nghi\u00ean c\u1ee9u t\u00ednh ch\u1ea5t b\u1ec1 m\u1eb7t v\u1eadt li\u1ec7u. Do \u0111\u00f3, nhu c\u1ea7u x\u00e2y d\u1ef1ng m\u1ed9t h\u1ec7 th\u1ed1ng ch\u00f9m positron ch\u1eadm trong t\u01b0\u01a1ng lai t\u1ea1i Trung t\u00e2m \u0111\u1ec3 ph\u1ee5c v\u1ee5 cho c\u00e1c nghi\u00ean c\u1ee9u chuy\u00ean s\u00e2u l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft. \u0110\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh kh\u1ea3 thi cho vi\u1ec7c x\u00e2y d\u1ef1ng h\u1ec7 th\u1ed1ng, c\u00f4ng vi\u1ec7c ti\u00ean quy\u1ebft c\u1ea7n l\u00e0m \u1edf giai \u0111o\u1ea1n \u0111\u1ea7u l\u00e0 t\u00ecm hi\u1ec3u v\u00e0 s\u1eed d\u1ee5ng c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh m\u00f4 ph\u1ecfng qu\u1ef9 \u0111\u1ea1o h\u1ea1t \u0111\u1ec3 ph\u1ee5c v\u1ee5 cho vi\u1ec7c thi\u1ebft k\u1ebf nguy\u00ean t\u1eafc cho h\u1ec7 th\u1ed1ng. Trong s\u1ed1 c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh m\u00f4 ph\u1ecfng ti\u00eau bi\u1ec3u, ch\u01b0\u01a1ng tr\u00ecnh Simion v\u1edbi nhi\u1ec1u t\u00ednh n\u0103ng t\u1ed1t \u0111\u00e3 v\u00e0 \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i v\u1edbi \u1ee9ng d\u1ee5ng ch\u00ednh l\u00e0 m\u00f4 ph\u1ecfng c\u00e1c tr\u01b0\u1eddng \u0111i\u1ec7n t\u1eeb v\u00e0 t\u00ednh to\u00e1n qu\u1ef9 \u0111\u1ea1o c\u1ee7a h\u1ea1t mang \u0111i\u1ec7n trong \u0111i\u1ec7n t\u1eeb tr\u01b0\u1eddng. Ch\u01b0\u01a1ng tr\u00ecnh Simion \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho vi\u1ec7c nghi\u00ean c\u1ee9u x\u00e2y d\u1ef1ng c\u00e1c h\u1ec7 th\u1ed1ng ch\u00f9m positron ch\u1eadm t\u1ea1i m\u1ed9t s\u1ed1 ph\u00f2ng th\u00ed nghi\u1ec7m tr\u00ean th\u1ebf gi\u1edbi.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\">Nguy\u00ean l\u00fd thi\u1ebft k\u1ebf c\u1ee7a m\u1ed9t h\u1ec7 th\u1ed1ng ch\u00f9m positron ch\u1eadm c\u00f9ng t\u1ed5ng quan v\u1ec1 ch\u01b0\u01a1ng tr\u00ecnh m\u00f4 ph\u1ecfng Simion. Ngo\u00e0i ra, m\u1ed9t s\u1ed1 t\u00ednh to\u00e1n m\u00f4 ph\u1ecfng th\u1eed nghi\u1ec7m d\u1ef1a tr\u00ean thi\u1ebft k\u1ebf tham kh\u1ea3o c\u1ee7a h\u1ec7 th\u1ed1ng SPONSOR thu\u1ed9c Vi\u1ec7n nghi\u00ean c\u1ee9u Rossendorf b\u1eb1ng ch\u01b0\u01a1ng tr\u00ecnh Simion \u0111\u00e3 \u0111\u01b0\u1ee3c nh\u00f3m nghi\u00ean c\u1ee9u t\u1ea1i Ph\u00f2ng V\u1eadt l\u00fd v\u00e0 Ph\u00e2n t\u00edch h\u1ea1t nh\u00e2n th\u1ef1c hi\u1ec7n v\u00e0 s\u1ef1 ph\u00f9 h\u1ee3p gi\u1eefa k\u1ebft qu\u1ea3 m\u00f4 ph\u1ecfng v\u1edbi c\u00e1c k\u1ebft qu\u1ea3 t\u00ednh to\u00e1n, \u0111o \u0111\u1ea1c th\u1ef1c nghi\u1ec7m c\u1ee7a h\u1ec7 th\u1ed1ng SPONSOR \u0111\u00e3 ch\u1ee9ng t\u1ecf ch\u01b0\u01a1ng tr\u00ecnh Simion l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 t\u00ednh to\u00e1n th\u00edch h\u1ee3p, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho vi\u1ec7c thi\u1ebft k\u1ebf nguy\u00ean t\u1eafc h\u1ec7 th\u1ed1ng ch\u00f9m positron ch\u1eadm. B\u00ean c\u1ea1nh \u0111\u00f3, m\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 trong vi\u1ec7c x\u00e2y d\u1ef1ng c\u00e1c m\u00f4 h\u00ecnh thi\u1ebft k\u1ebf kh\u1ea3 thi c\u1ee7a h\u1ec7 th\u1ed1ng d\u1ef1a tr\u00ean nguy\u00ean l\u00fd thi\u1ebft k\u1ebf c\u1ee7a m\u1ed9t s\u1ed1 h\u1ec7 th\u1ed1ng ti\u00eau bi\u1ec3u \u0111\u00e3 \u0111\u01b0\u1ee3c ch\u1ebf t\u1ea1o tr\u00ean th\u1ebf gi\u1edbi \u0111\u1ec3 l\u00e0m c\u01a1 s\u1edf cho vi\u1ec7c thi\u1ebft k\u1ebf chi ti\u1ebft k\u1ef9 thu\u1eadt, ch\u1ebf t\u1ea1o, x\u00e2y d\u1ef1ng cho h\u1ec7 th\u1ed1ng ch\u00f9m positron ch\u1eadm c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong t\u01b0\u01a1ng lai t\u1ea1i Trung t\u00e2m.<\/p>\n<p>&nbsp;<\/p>\n<p style=\"text-align: justify;\">K\u1ebft th\u00fac b\u00e1o c\u00e1o, c\u00e1c c\u00e1n b\u1ed9 tham gia h\u1ed9i th\u1ea3o \u0111\u00e3 c\u00f3 nh\u1eefng trao \u0111\u1ed5i, tranh lu\u1eadn s\u00f4i n\u1ed5i v\u00e0 \u0111\u01b0a ra nh\u1eefng \u00fd ki\u1ebfn \u0111\u00f3ng g\u00f3p thi\u1ebft th\u1ef1c cho n\u1ed9i dung tr\u00ecnh b\u00e0y seminar.<\/p>\n<p style=\"text-align: justify;\"><strong><em>\u00a0<\/em><\/strong><\/p>\n<p style=\"text-align: right;\"><strong>Trung t\u00e2m H\u1ea1t nh\u00e2n Tp. H\u1ed3 Ch\u00ed Minh<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Chi\u1ec1u ng\u00e0y 24\/08\/2018, Trung t\u00e2m H\u1ea1t nh\u00e2n Tp. H\u1ed3 Ch\u00ed Minh \u0111\u00e3 t\u1ed5 ch\u1ee9c seminar khoa h\u1ecdc v\u1ec1 M\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 t\u00ednh to\u00e1n m\u00f4 ph\u1ecfng h\u1ec7 th\u1ed1ng chum Positron ch\u1eadm s\u1eed d\u1ee5ng ch\u01b0\u01a1ng tr\u00ecnh Simion, do C\u1eed nh\u00e2n Cao Thanh Long, c\u00e1n b\u1ed9 Ph\u00f2ng V\u1eadt l\u00fd v\u00e0 Ph\u00e2n t\u00edch h\u1ea1t nh\u00e2n tr\u00ecnh b\u00e0y. &nbsp; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":13269,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,24,16],"tags":[],"class_list":["post-1943","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hoi-nghi-hoi-thao","category-tin-hoat-dong-cua-vien","category-tin-tuc"],"_links":{"self":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/posts\/1943","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/comments?post=1943"}],"version-history":[{"count":3,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/posts\/1943\/revisions"}],"predecessor-version":[{"id":13272,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/posts\/1943\/revisions\/13272"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/media\/13269"}],"wp:attachment":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/media?parent=1943"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/categories?post=1943"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/tags?post=1943"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}