{"id":8188,"date":"2021-10-20T16:39:17","date_gmt":"2021-10-20T09:39:17","guid":{"rendered":"https:\/\/vinatom.gov.vn\/?p=8188"},"modified":"2021-10-20T16:39:17","modified_gmt":"2021-10-20T09:39:17","slug":"mot-so-ket-qua-moi-tu-de-tai-nghien-cuu-phat-trien-thiet-bi-va-khai-thac-dong-notron-nhiet-tren-kenh-ngang-so-1-lo-phan-ung-hat-nhan-da-lat","status":"publish","type":"post","link":"https:\/\/vinatom.gov.vn\/mot-so-ket-qua-moi-tu-de-tai-nghien-cuu-phat-trien-thiet-bi-va-khai-thac-dong-notron-nhiet-tren-kenh-ngang-so-1-lo-phan-ung-hat-nhan-da-lat\/","title":{"rendered":"M\u1ed9t s\u1ed1 k\u1ebft qu\u1ea3 m\u1edbi t\u1eeb \u0111\u1ec1 t\u00e0i \u201cNghi\u00ean c\u1ee9u ph\u00e1t tri\u1ec3n thi\u1ebft b\u1ecb v\u00e0 khai th\u00e1c d\u00f2ng n\u01a1tron nhi\u1ec7t tr\u00ean k\u00eanh ngang s\u1ed1 1 l\u00f2 ph\u1ea3n \u1ee9ng h\u1ea1t nh\u00e2n \u0110\u00e0 L\u1ea1t\u201d"},"content":{"rendered":"

\u0110\u1ec1 t\u00e0i nghi\u00ean c\u1ee9u khoa h\u1ecdc \u201cNghi\u00ean c\u1ee9u ph\u00e1t tri\u1ec3n thi\u1ebft b\u1ecb v\u00e0 khai th\u00e1c d\u00f2ng n\u01a1tron nhi\u1ec7t tr\u00ean k\u00eanh ngang s\u1ed1 1 L\u00f2 ph\u1ea3n \u1ee9ng h\u1ea1t nh\u00e2n \u0110\u00e0 L\u1ea1t\u201d thu\u1ed9c Ch\u01b0\u01a1ng tr\u00ecnh khoa h\u1ecdc v\u00e0 c\u00f4ng ngh\u1ec7 tr\u1ecdng \u0111i\u1ec3m c\u1ea5p qu\u1ed1c gia (M\u00e3 s\u1ed1: KC05\/16-20) th\u1ef1c hi\u1ec7n trong th\u1eddi gian 2017-2021, do TS. Ph\u1ea1m Ng\u1ecdc S\u01a1n l\u00e0m ch\u1ee7 nhi\u1ec7m, Vi\u1ec7n Nghi\u00ean c\u1ee9u h\u1ea1t nh\u00e2n l\u00e0 \u0111\u01a1n v\u1ecb ch\u1ee7 tr\u00ec, \u0111\u00e3 \u0111\u01b0\u1ee3c nghi\u1ec7m thu c\u1ea5p Nh\u00e0 n\u01b0\u1edbc ng\u00e0y 14\/10\/2021. \u0110\u1ec1 t\u00e0i \u0111\u1eb7t ra v\u1edbi m\u1ee5c ti\u00eau chung nh\u1eb1m ph\u00e1t tri\u1ec3n ph\u00f2ng th\u00ed nghi\u1ec7m nghi\u00ean c\u1ee9u khoa h\u1ecdc v\u1edbi thi\u1ebft b\u1ecb h\u1ea1t nh\u00e2n, thi\u1ebft b\u1ecb b\u1ee9c x\u1ea1 hi\u1ec7n \u0111\u1ea1i; n\u00e2ng cao n\u0103ng l\u1ef1c nghi\u00ean c\u1ee9u t\u1ef1 ch\u1ebf t\u1ea1o, b\u1ea3o d\u01b0\u1ee1ng thi\u1ebft b\u1ecb \u0111i\u1ec7n t\u1eed h\u1ea1t nh\u00e2n; tham gia \u0111\u00e0o t\u1ea1o c\u00e1n b\u1ed9 nghi\u00ean c\u1ee9u khoa h\u1ecdc h\u1ea1t nh\u00e2n. C\u00e1c m\u1ee5c ti\u00eau c\u1ee5 th\u1ec3 g\u1ed3m: \u0110\u01b0a \u0111\u01b0\u1ee3c k\u00eanh ngang s\u1ed1 1 c\u1ee7a L\u00f2 ph\u1ea3n \u1ee9ng h\u1ea1t nh\u00e2n \u0110\u00e0 L\u1ea1t v\u00e0o tr\u1ea1ng th\u00e1i s\u1eed d\u1ee5ng, ph\u1ee5c v\u1ee5 nghi\u00ean c\u1ee9u v\u1eadt l\u00fd h\u1ea1t nh\u00e2n v\u00e0 \u0111\u00e0o t\u1ea1o; ch\u1ebf t\u1ea1o \u0111\u01b0\u1ee3c 1 h\u1ec7 \u0111o t\u00e1n x\u1ea1 n\u01a1tron s\u1eed d\u1ee5ng h\u1ec7 5 \u0111\u1ea7u d\u00f2 He-3; ho\u00e0n thi\u1ec7n ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec7n t\u1eed k\u1ef9 thu\u1eadt s\u1ed1 v\u00e0 \u00e1p d\u1ee5ng ch\u1ebf t\u1ea1o m\u1edbi 1 h\u1ec7 ph\u1ed5 k\u1ebf gamma \u0111o \u0111a k\u00eanh v\u00e0 tr\u00f9ng ph\u00f9ng k\u1ef9 thu\u1eadt s\u1ed1 s\u1eed d\u1ee5ng 2 \u0111\u1ea7u d\u00f2 b\u00e1n d\u1eabn HPGe; b\u1ed5 sung s\u1ed1 li\u1ec7u h\u1ea1t nh\u00e2n v\u00e0 c\u1ea5u tr\u00fac m\u1ee9c c\u1ee7a m\u1ed9t s\u1ed1 h\u1ea1t nh\u00e2n n\u1eb7ng kh\u00f4ng b\u1ec1n.<\/p>\n

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\u0110\u1ec3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u00e1c m\u1ee5c ti\u00eau \u0111\u1eb7t ra, c\u00e1c ph\u01b0\u01a1ng ph\u00e1p nghi\u00ean c\u1ee9u, k\u1ef9 thu\u1eadt \u0111\u00e3 \u00e1p d\u1ee5ng bao g\u1ed3m: s\u1eed d\u1ee5ng ph\u01b0\u01a1ng ph\u00e1p m\u00f4 ph\u1ecfng Monte-Carlo th\u00f4ng qua c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh m\u00f4 ph\u1ecfng nh\u01b0 MCNP5, PHITS-3.17 \u0111\u1ec3 t\u00ednh to\u00e1n v\u00e0 l\u1ef1a ch\u1ecdn m\u00f4 h\u00ecnh t\u1ed1i \u01b0u thi\u1ebft k\u1ebf h\u1ec7 th\u1ed1ng d\u1eabn d\u00f2ng v\u00e0 che ch\u1eafn b\u1ee9c x\u1ea1; \u1ee9ng d\u1ee5ng k\u1ef9 thu\u1eadt DSP v\u00e0 FPGA l\u1eadp tr\u00ecnh x\u1eed l\u00fd t\u00edn hi\u1ec7u t\u1eeb \u0111\u1ea7u d\u00f2 HPGe s\u1eed d\u1ee5ng ADC nhanh, vi m\u1ea1ch l\u1eadp tr\u00ecnh \u0111\u01b0\u1ee3c FPGA v\u00e0 b\u1ed9 c\u00f4ng c\u1ee5 l\u1eadp tr\u00ecnh c\u1ee7a Xilinx, LabVIEW. K\u1ebft qu\u1ea3 ch\u00ednh \u0111\u00e3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u1ee7a \u0111\u1ec1 t\u00e0i bao g\u1ed3m:<\/p>\n

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\u0110\u00e3 t\u1ea1o \u0111\u01b0\u1ee3c ch\u00f9m n\u01a1tron nhi\u1ec7t c\u00f3 ch\u1ea5t l\u01b0\u1ee3ng t\u1ed1t tr\u00ean c\u01a1 s\u1edf k\u00eanh ngang s\u1ed1 1 v\u00e0 \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o ho\u1ea1t \u0111\u1ed9ng c\u00f9ng v\u1edbi h\u1ec7 thi\u1ebft b\u1ecb t\u1ea1o d\u00f2ng n\u01a1tron nhi\u1ec7t v\u00e0 che ch\u1eafn b\u1ee9c x\u1ea1. C\u00e1c k\u1ebft qu\u1ea3 \u0111o th\u1ef1c nghi\u1ec7m cho th\u1ea5y r\u1eb1ng v\u1edbi c\u1ea5u h\u00ecnh chu\u1ea9n tr\u1ef1c h\u00ecnh tr\u1ee5 l\u00e0 c\u1ea5u h\u00ecnh k\u00eanh \u0111\u00e3 l\u1eafp \u0111\u1eb7t hi\u1ec7n t\u1ea1i (h\u00ecnh 1) c\u00f3 th\u00f4ng l\u01b0\u1ee3ng n\u01a1tron nhi\u1ec7t l\u00e0 6,68×10^{6<\/sup> n\/cm^{2<\/sup>\/s v\u00e0 su\u1ea5t li\u1ec1u b\u1ee9c x\u1ea1 trung b\u00ecnh t\u1ea1i \u0111a s\u1ed1 c\u00e1c v\u1ecb tr\u00ed xung quanh k\u00eanh ngang < 5 \u03bcSv\/h. V\u1edbi c\u1ea5u h\u00ecnh chu\u1ea9n tr\u1ef1c n\u00e0y, hi\u1ec7n nay k\u00eanh ngang s\u1ed1 1 ho\u00e0n to\u00e0n \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng ch\u00f9m n\u01a1tron nhi\u1ec7t v\u00e0 an to\u00e0n b\u1ee9c x\u1ea1, ph\u1ee5c v\u1ee5 ho\u1ea1t \u0111\u1ed9ng nghi\u00ean c\u1ee9u khoa h\u1ecdc v\u00e0 \u0111\u00e0o t\u1ea1o v\u1ec1 v\u1eadt l\u00fd h\u1ea1t nh\u00e2n th\u1ef1c nghi\u1ec7m.<\/p>\n}}

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$\"\"$ H\u00ecnh 1. M\u00f4 h\u00ecnh thi\u1ebft k\u1ebf k\u00eanh ngang s\u1ed1 1, L\u00f2 ph\u1ea3n \u1ee9ng h\u1ea1t nh\u00e2n \u0110\u00e0 L\u1ea1t<\/em><\/p>\n

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\u0110\u00e3 nghi\u00ean c\u1ee9u thi\u1ebft k\u1ebf, ch\u1ebf t\u1ea1o v\u00e0 l\u1eafp \u0111\u1eb7t th\u00e0nh c\u00f4ng m\u1ed9t h\u1ec7 \u0111o tr\u00f9ng ph\u00f9ng gamma-gamma b\u1eb1ng ph\u01b0\u01a1ng ph\u00e1p \u0111i\u1ec7n t\u1eed k\u1ef9 thu\u1eadt s\u1ed1 (h\u00ecnh 2). C\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh c\u1ea5u th\u00e0nh h\u1ec7 \u0111o n\u00e0y bao g\u1ed3m 1 b\u1ea3ng m\u1ea1ch l\u1eadp tr\u00ecnh \u0111\u01b0\u1ee3c FPGA (Virtex-7 VC707), b\u1ea3ng m\u1ea1ch ADC (FMC104, 4-Channel 250 MSPS), 02 \u0111\u1ea7u d\u00f2 HPGe (GMX25P4-Ortec) v\u00e0 ph\u1ea7n m\u1ec1m do \u0111\u1ec1 t\u00e0i ph\u00e1t tri\u1ec3n \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00edch h\u1ee3p \u0111\u1ec3 ph\u00e1t tri\u1ec3n th\u00e0nh c\u00f4ng m\u1ed9t h\u1ec7 ph\u1ed5 k\u1ebf tr\u00f9ng ph\u00f9ng k\u1ef9 thu\u1eadt s\u1ed1 4 \u0111\u01b0\u1eddng t\u00edn hi\u1ec7u Input \u0111\u1ed9c l\u1eadp, 16 K k\u00eanh. C\u00e1c th\u00f4ng s\u1ed1 \u0111\u1ed9 ph\u00e2n gi\u1ea3i n\u0103ng l\u01b0\u1ee3ng c\u1ee7a to\u00e0n h\u1ec7 ph\u1ed5 k\u1ebf \u0111\u1ea1t 2,7 keV (t\u1ea1i n\u0103ng l\u01b0\u1ee3ng 1332 keV, ngu\u1ed3n chu\u1ea9n Co-60) v\u00e0 \u0111\u1ed9 ph\u00e2n gi\u1ea3i th\u1eddi gian tr\u00f9ng ph\u00f9ng l\u00e0 7,0 ns.<\/p>\n

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$\"\"$ H\u00ecnh 2. K\u00eanh ngang s\u1ed1 1 v\u00e0 h\u1ec7 \u0111i\u1ec7n t\u1eed k\u1ef9 thu\u1eadt s\u1ed1 \u0111o tr\u00f9ng ph\u00f9ng gamma-gamma<\/em><\/p>\n

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\u0110\u00e3 nghi\u00ean c\u1ee9u ph\u00e1t tri\u1ec3n v\u00e0 ho\u00e0n th\u00e0nh l\u1eafp \u0111\u1eb7t m\u1ed9t h\u1ec7 \u0111o ti\u1ebft di\u1ec7n t\u00e1n x\u1ea1 n\u01a1tron (h\u00ecnh 3). H\u1ec7 \u0111o t\u00e1n x\u1ea1 n\u01a1tron n\u00e0y s\u1eed d\u1ee5ng 05 \u0111\u1ea7u d\u00f2 He-3 v\u00e0 h\u1ec7 ph\u1ed5 k\u1ebf ph\u00e2n t\u00edch \u0111a k\u00eanh b\u1eb1ng k\u1ef9 thu\u1eadt t\u01b0\u01a1ng t\u1ef1 (\u0111o \u0111\u1ed3ng th\u1eddi 5 k\u00eanh t\u00edn hi\u1ec7u Input). \u0110\u1ec1 t\u00e0i \u0111\u00e3 th\u1ef1c hi\u1ec7n vi\u1ec7c ch\u1ebf t\u1ea1o h\u1ec7 c\u01a1 kh\u00ed di chuy\u1ec3n \u0111\u1ea7u d\u00f2, h\u1ec7 gi\u00e1 \u0111\u1ee1 v\u00e0 chu\u1ea9n tr\u1ef1c cho h\u1ec7 \u0111o ti\u1ebft di\u1ec7n t\u00e1n x\u1ea1 n\u01a1tron. Vi\u1ec7c l\u1eafp \u0111\u1eb7t v\u00e0 th\u1eed nghi\u1ec7m to\u00e0n b\u1ed9 h\u1ec7 th\u1ed1ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n t\u1ea1i L\u00f2 ph\u1ea3n \u1ee9ng h\u1ea1t nh\u00e2n \u0110\u00e0 L\u1ea1t. K\u1ebft qu\u1ea3 th\u1ef1c nghi\u1ec7m cho th\u1ea5y, h\u1ec7 c\u01a1 kh\u00ed quay theo g\u00f3c, h\u1ec7 \u0111i\u1ec7n t\u1eed \u0111i\u1ec1u khi\u1ec3n v\u00e0 h\u1ec7 \u0111o n\u01a1tron v\u1edbi 5 \u1ed1ng \u0111\u1ebfm He-3 ho\u1ea1t \u0111\u1ed9ng ch\u00ednh x\u00e1c, \u1ed5n \u0111\u1ecbnh v\u00e0 tin c\u1eady. \u0110\u1ed9 ph\u00e2n gi\u1ea3i g\u00f3c gi\u1eefa c\u00e1c \u0111\u1ea7u d\u00f2 l\u00e0 1,8^{o<\/sup> v\u00e0 g\u00f3c kh\u1ed1i d(\u03a9) t\u01b0\u01a1ng \u1ee9ng v\u1edbi m\u1ed7i \u0111\u1ea7u d\u00f2 l\u00e0 0,67^{o<\/sup>.<\/p>\n}}

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$\"\"$ H\u00ecnh 3. H\u1ec7 \u0111o t\u00e1n x\u1ea1 n\u01a1tron \u0111\u00e0n h\u1ed3i t\u1ea1i L\u00f2 ph\u1ea3n \u1ee9ng h\u1ea1t nh\u00e2n \u0110\u00e0 L\u1ea1t<\/em><\/p>\n

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Ngo\u00e0i ra, c\u00e1c k\u1ebft qu\u1ea3 c\u1ee7a \u0111\u1ec1 t\u00e0i \u0111\u00e3 \u0111\u01b0\u1ee3c \u0111\u0103ng t\u1ea3i trong 03 b\u00e0i b\u00e1o khoa h\u1ecdc t\u1ea1p ch\u00ed qu\u1ed1c t\u1ebf (ISI) v\u00e0 07 b\u00e0i b\u00e1o t\u1ea1p ch\u00ed n\u01b0\u1edbc ngo\u00e0i, trong n\u01b0\u1edbc v\u00e0 b\u00e1o c\u00e1o t\u1ea1i H\u1ed9i ngh\u1ecb VINANST-13. \u0110\u1ec1 t\u00e0i c\u0169ng \u0111\u00e3 h\u1ed7 tr\u1ee3 \u0111\u00e0o t\u1ea1o 03 NCS v\u00e0 05 h\u1ecdc vi\u00ean cao h\u1ecdc.<\/p>\n

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H\u1ed9i \u0111\u1ed3ng khoa h\u1ecdc \u0111\u00e1nh gi\u00e1, nghi\u1ec7m thu c\u1ea5p Nh\u00e0 n\u01b0\u1edbc \u0111\u00e3 \u0111\u00e1nh gi\u00e1 cao c\u00e1c k\u1ebft qu\u1ea3 v\u00e0 s\u1ea3n ph\u1ea9m \u0111\u00e3 \u0111\u1ea1t \u0111\u01b0\u1ee3c c\u1ee7a \u0111\u1ec1 t\u00e0i.<\/p>\n

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Ph\u1ea1m Ng\u1ecdc S\u01a1n, Vi\u1ec7n Nghi\u00ean c\u1ee9u h\u1ea1t nh\u00e2n<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

\u0110\u1ec1 t\u00e0i nghi\u00ean c\u1ee9u khoa h\u1ecdc \u201cNghi\u00ean c\u1ee9u ph\u00e1t tri\u1ec3n thi\u1ebft b\u1ecb v\u00e0 khai th\u00e1c d\u00f2ng n\u01a1tron nhi\u1ec7t tr\u00ean k\u00eanh ngang s\u1ed1 1 L\u00f2 ph\u1ea3n \u1ee9ng h\u1ea1t nh\u00e2n \u0110\u00e0 L\u1ea1t\u201d thu\u1ed9c Ch\u01b0\u01a1ng tr\u00ecnh khoa h\u1ecdc v\u00e0 c\u00f4ng ngh\u1ec7 tr\u1ecdng \u0111i\u1ec3m c\u1ea5p qu\u1ed1c gia (M\u00e3 s\u1ed1: KC05\/16-20) th\u1ef1c hi\u1ec7n trong th\u1eddi gian 2017-2021, do TS. Ph\u1ea1m […]<\/p>\n","protected":false},"author":1,"featured_media":8191,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[26],"tags":[],"class_list":["post-8188","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tong-hop"],"_links":{"self":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/posts\/8188","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=8188"}],"version-history":[{"count":0,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/posts\/8188\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/"}],"wp:attachment":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/media?parent=8188"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/categories?post=8188"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/tags?post=8188"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}