{"id":4710,"date":"2020-02-19T10:13:37","date_gmt":"2020-02-19T03:13:37","guid":{"rendered":"https:\/\/vinatom.gov.vn\/?p=4710"},"modified":"2020-02-19T10:13:37","modified_gmt":"2020-02-19T03:13:37","slug":"mo-ta-thong-nhat-phuong-trinh-trang-thai-cua-chat-hat-nhan-va-the-quang-hoc-nucleon-tren-co-so-truong-trung-binh-vi-mo","status":"publish","type":"post","link":"https:\/\/vinatom.gov.vn\/mo-ta-thong-nhat-phuong-trinh-trang-thai-cua-chat-hat-nhan-va-the-quang-hoc-nucleon-tren-co-so-truong-trung-binh-vi-mo\/","title":{"rendered":"M\u00f4 t\u1ea3 th\u1ed1ng nh\u1ea5t ph\u01b0\u01a1ng tr\u00ecnh tr\u1ea1ng th\u00e1i c\u1ee7a ch\u1ea5t h\u1ea1t nh\u00e2n v\u00e0 th\u1ebf quang h\u1ecdc nucleon tr\u00ean c\u01a1 s\u1edf tr\u01b0\u1eddng trung b\u00ecnh vi m\u00f4"},"content":{"rendered":"

<\/p>\n

Trong c\u00e1c m\u1eabu t\u00ednh to\u00e1n vi m\u00f4 NMF, ph\u01b0\u01a1ng ph\u00e1p Hartree-Fock (HF) \u0111\u00e3 v\u00e0 \u0111ang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c nghi\u00ean c\u1ee9u c\u1ea5u tr\u00fac h\u1ea1t nh\u00e2n v\u00e0 EOS c\u1ee7a CHN v\u1edbi tham s\u1ed1 \u0111\u1ea7u v\u00e0o l\u00e0 nh\u1eefng phi\u00ean b\u1ea3n kh\u00e1c nhau c\u1ee7a t\u01b0\u01a1ng t\u00e1c NN hi\u1ec7u d\u1ee5ng. C\u00e1c t\u01b0\u01a1ng t\u00e1c NN hi\u1ec7u d\u1ee5ng n\u00e0y \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng ph\u1ee5 thu\u1ed9c t\u01b0\u1eddng minh v\u00e0o m\u1eadt \u0111\u1ed9 nucleon t\u1ea1i m\u00f4i tr\u01b0\u1eddng h\u1ea1t nh\u00e2n bao quanh hai nucleon t\u01b0\u01a1ng t\u00e1c. M\u1ed9t trong nh\u1eefng l\u1ef1a ch\u1ecdn cho t\u01b0\u01a1ng t\u00e1c NN hi\u1ec7u d\u1ee5ng l\u00e0 c\u00e1c phi\u00ean b\u1ea3n ph\u1ee5 thu\u1ed9c m\u1eadt \u0111\u1ed9 CDM3Yn, t\u01b0\u01a1ng t\u00e1c \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng t\u1eeb nh\u1eefng n\u0103m 90 b\u1edfi nh\u00f3m nghi\u00ean c\u1ee9u t\u1ea1i Vi\u1ec7n Khoa h\u1ecdc v\u00e0 K\u1ef9 thu\u1eadt h\u1ea1t nh\u00e2n v\u00e0 \u0111\u00e3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ea5t hi\u1ec7u qu\u1ea3 trong c\u00e1c t\u00ednh to\u00e1n vi m\u00f4 th\u1ebf t\u00e1n x\u1ea1 nucleon-h\u1ea1t nh\u00e2n v\u00e0 h\u1ea1t nh\u00e2n-h\u1ea1t nh\u00e2n theo m\u1eabu folding. G\u1ea7n \u0111\u00e2y, nh\u00f3m nghi\u00ean c\u1ee9u \u0111\u00e3 x\u00e2y d\u1ef1ng th\u00e0nh c\u00f4ng m\u00f4 h\u00ecnh NMF theo ph\u01b0\u01a1ng ph\u00e1p HF m\u1edf r\u1ed9ng \u0111\u1ec3 m\u00f4 t\u1ea3 th\u1ed1ng nh\u1ea5t th\u1ebf \u0111\u01a1n h\u1ea1t nucleon li\u00ean k\u1ebft trong ch\u1ea5t h\u1ea1t nh\u00e2n v\u00e0 th\u1ebf quang h\u1ecdc nucleon t\u00e1n x\u1ea1 tr\u00ean CHN c\u00f3 t\u00ednh \u0111\u1ebfn th\u00e0nh ph\u1ea7n t\u00e1i ch\u1ec9nh h\u1ee3p (RT), s\u1ed1 h\u1ea1ng xu\u1ea5t hi\u1ec7n t\u1ef1 nhi\u00ean trong th\u1ebf \u0111\u01a1n h\u1ea1t do t\u01b0\u01a1ng t\u00e1c nucleon-nucleon hi\u1ec7u d\u1ee5ng ph\u1ee5 thu\u1ed9c m\u1eadt \u0111\u1ed9. C\u00e1c \u0111\u1ea1i l\u01b0\u1ee3ng v\u1eadt l\u00fd quan tr\u1ecdng nh\u01b0 n\u0103ng l\u01b0\u1ee3ng \u0111\u1ed1i x\u1ee9ng v\u00e0 kh\u1ed1i l\u01b0\u1ee3ng hi\u1ec7u d\u1ee5ng c\u0169ng \u0111\u01b0\u1ee3c kh\u1ea3o s\u00e1t c\u1ee5 th\u1ec3 qua m\u1ed1i li\u00ean h\u1ec7 v\u1edbi th\u1ebf \u0111\u01a1n h\u1ea1t nucleon.<\/p>\n

<\/p>\n

Ngo\u00e0i ra, m\u00f4 t\u1ea3 t\u00e1n x\u1ea1 nucleon-h\u1ea1t nh\u00e2n theo c\u00e1c ph\u01b0\u01a1ng ph\u00e1p vi m\u00f4 nh\u01b0 m\u1eabu folding v\u1edbi y\u1ebfu t\u1ed1 \u0111\u1ea7u v\u00e0o l\u00e0 t\u01b0\u01a1ng t\u00e1c NN hi\u1ec7u d\u1ee5ng v\u00e0 h\u00e0m s\u00f3ng c\u1ee7a nucleon li\u00ean k\u1ebft trong h\u1ea1t nh\u00e2n l\u00e0 c\u00f4ng c\u1ee5 \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 c\u00e1c m\u1eabu c\u1ea5u tr\u00fac c\u0169ng nh\u01b0 c\u00e1c m\u00f4 h\u00ecnh t\u01b0\u01a1ng t\u00e1c NN hi\u1ec7u d\u1ee5ng. V\u1edbi hi\u1ec7u \u1ee9ng quan tr\u1ecdng c\u1ee7a RT g\u00e2y b\u1edfi t\u01b0\u01a1ng quan nhi\u1ec1u h\u1ea1t, th\u1ebf quang h\u1ecdc nucleon t\u00e1n x\u1ea1 l\u00ean h\u1ea1t nh\u00e2n h\u1eefu h\u1ea1n c\u0169ng \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh theo m\u1eabu folding m\u1edf r\u1ed9ng (c\u00f3 t\u00ednh \u0111\u1ebfn \u0111\u00f3ng g\u00f3p c\u1ee7a RT), gi\u00fap m\u00f4 t\u1ea3 t\u1ed1t t\u00e1n x\u1ea1 \u0111\u00e0n h\u1ed3i nucleon l\u00ean m\u1ed9t s\u1ed1 h\u1ea1t nh\u00e2n b\u1ec1n nh\u01b0 ^{40,48<\/sup>Ca, ^{90<\/sup>Zr v\u00e0 ^{208<\/sup>Pb t\u1ea1i n\u0103ng l\u01b0\u1ee3ng th\u1ea5p v\u00e0 trung b\u00ecnh. Hi\u1ec7u \u1ee9ng phi \u0111\u1ecbnh x\u1ee9 c\u1ee7a th\u1ebf quang h\u1ecdc nucleon, hi\u1ec7u \u1ee9ng v\u1eadt l\u00fd xu\u1ea5t ph\u00e1t t\u1eeb th\u00e0nh ph\u1ea7n trao \u0111\u1ed5i c\u1ee7a th\u1ebf (do nguy\u00ean l\u00fd Pauli) v\u00e0 \u0111\u00f3ng g\u00f3p c\u1ee7a c\u00e1c k\u00eanh t\u00e1n x\u1ea1 kh\u00f4ng \u0111\u00e0n h\u1ed3i, \u0111\u01b0\u1ee3c kh\u1ea3o s\u00e1t c\u1ee5 th\u1ec3 qua so s\u00e1nh c\u00e1c k\u1ebft qu\u1ea3 t\u00ednh to\u00e1n ti\u1ebft di\u1ec7n t\u00e1n x\u1ea1 \u0111\u00e0n h\u1ed3i c\u1ee7a nucleon tr\u00ean c\u00e1c h\u1ea1t nh\u00e2n bia kh\u00e1c nhau, s\u1eed d\u1ee5ng th\u1ebf quang h\u1ecdc \u0111\u1ecbnh x\u1ee9 v\u00e0 phi \u0111\u1ecbnh x\u1ee9 t\u00ednh theo m\u1eabu folding m\u1edf r\u1ed9ng. Nh\u1eefng k\u1ebft qu\u1ea3 thu \u0111\u01b0\u1ee3c \u0111\u00e3 kh\u1eb3ng \u0111\u1ecbnh vai tr\u00f2 quan tr\u1ecdng c\u1ee7a th\u00e0nh ph\u1ea7n t\u00e1i ch\u1ec9nh h\u1ee3p (RT) trong m\u00f4 t\u1ea3 c\u00e1c \u0111\u1eb7c tr\u01b0ng c\u01a1 b\u1ea3n c\u1ee7a CHN c\u0169ng nh\u01b0 trong nghi\u00ean c\u1ee9u t\u00e1n x\u1ea1 \u0111\u00e0n h\u1ed3i nucleon-h\u1ea1t nh\u00e2n.<\/p>\n}}}

\u00a0<\/em><\/p>\n

$\"\"$ H\u00ecnh v\u1ebd: Ti\u1ebft di\u1ec7n t\u00e1n x\u1ea1 \u0111\u00e0n h\u1ed3i neutron l\u00ean c\u00e1c h\u1ea1t nh\u00e2n bia ^{40<\/sup>Ca,\u00a0 ^{48<\/sup>Ca v\u00e0 ^{90<\/sup>Zr t\u1ea1i c\u00e1c n\u0103ng l\u01b0\u1ee3ng l\u1ea7n l\u01b0\u1ee3t l\u00e0 16.9, 16.8 v\u00e0 24 MeV thu \u0111\u01b0\u1ee3c v\u1edbi th\u1ebf folding phi \u0111\u1ecbnh x\u1ee9 s\u1eed d\u1ee5ng t\u01b0\u01a1ng t\u00e1c CDM3Y6 trong hai tr\u01b0\u1eddng h\u1ee3p c\u00f3 (Nonlocal with RT) v\u00e0 kh\u00f4ng c\u00f3 (Nonlocal without RT) \u0111\u00f3ng g\u00f3p c\u1ee7a RT. K\u1ebft qu\u1ea3 \u0111\u01b0\u1ee3c so s\u00e1nh v\u1edbi tr\u01b0\u1eddng h\u1ee3p s\u1eed d\u1ee5ng th\u1ebf folding \u0111\u1ecbnh x\u1ee9 c\u00f3 \u0111\u00f3ng g\u00f3p c\u1ee7a RT (Local with RT).<\/em><\/p>\n}}}

<\/p>\n

C\u00e1c k\u1ebft qu\u1ea3 nghi\u00ean c\u1ee9u c\u1ee7a nh\u00f3m t\u00e1c gi\u1ea3 \u0111\u00e3 \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 tr\u00ean c\u00e1c t\u1ea1p ch\u00ed khoa h\u1ecdc qu\u1ed1c t\u1ebf c\u00f3 uy t\u00edn:<\/p>\n

Doan Thi Loan, Nguyen Hoang Phuc, and Dao T. Khoa,<\/em> “Rearrangement term in the folding model of the nucleon optical potential”<\/em>,<\/em> J. Phys. G: Nucl. Part. Phys<\/em> (2019).<\/em><\/p>\n

Doan Thi Loan, Bui Minh Loc, and Dao T. Khoa, “Extended Hartree-Fock study of the single-particle potential: The nuclear symmetry energy, nucleon effective mass, and folding model of the nucleon optical potential”, Physical<\/em> Review C<\/em> 034304 (2015)<\/em><\/p>\n

<\/p>\n

Do\u00e3n Th\u1ecb Loan, Vi\u1ec7n Khoa h\u1ecdc v\u00e0 K\u1ef9 thu\u1eadt h\u1ea1t nh\u00e2n<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Kh\u00e1i ni\u1ec7m tr\u01b0\u1eddng trung b\u00ecnh h\u1ea1t nh\u00e2n (nuclear mean field – NMF) \u0111\u00e3 \u0111\u01b0\u1ee3c Hans Bethe \u0111\u1ec1 xu\u1ea5t l\u1ea7n \u0111\u1ea7u ti\u00ean c\u00e1ch \u0111\u00e2y g\u1ea7n 80 n\u0103m d\u00f9ng \u0111\u1ec3 m\u00f4 t\u1ea3 th\u1ebf n\u0103ng \u0111\u01a1n h\u1ea1t (single particle potential) c\u1ee7a m\u1ed9t nucleon chuy\u1ec3n \u0111\u1ed9ng trong tr\u01b0\u1eddng th\u1ebf sinh b\u1edfi t\u01b0\u01a1ng t\u00e1c m\u1ea1nh gi\u1eefa nucleon \u0111\u00f3 v\u1edbi c\u00e1c […]<\/p>\n","protected":false},"author":1,"featured_media":4711,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-4710","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-hoat-dong-cua-vien"],"_links":{"self":[{"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/posts\/4710","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=4710"}],"version-history":[{"count":0,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/posts\/4710\/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=4710"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/categories?post=4710"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vinatom.gov.vn\/wp-json\/wp\/v2\/tags?post=4710"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}