{"id":26270,"date":"2023-01-18T10:42:10","date_gmt":"2023-01-18T13:42:10","guid":{"rendered":"https:\/\/mindthegraph.com\/blog\/viruses-that-can-cause-cancer-copy\/"},"modified":"2023-01-25T10:55:01","modified_gmt":"2023-01-25T13:55:01","slug":"nuclear-fusion","status":"publish","type":"post","link":"https:\/\/mindthegraph.com\/blog\/ro\/fuziune-nucleara\/","title":{"rendered":"Fuziunea nuclear\u0103: O introducere u\u0219or de \u00een\u021beles"},"content":{"rendered":"

Oamenii de \u0219tiin\u021b\u0103 au f\u0103cut o descoperire semnificativ\u0103 \u00een domeniul fuziunii nucleare, care ar putea deschide calea c\u0103tre o energie curat\u0103 \u0219i abundent\u0103 \u00een viitor. <\/p>\n\n\n\n

Aceast\u0103 descoperire a fost posibil\u0103 doar datorit\u0103 celor peste o jum\u0103tate de secol de cercet\u0103ri \u00een domeniul fuziunii nucleare. <\/p>\n\n\n\n

Iat\u0103 o introducere u\u0219or de \u00een\u021beles despre fuziunea nuclear\u0103, astfel \u00eenc\u00e2t s\u0103 pute\u021bi \u00een\u021belege corect aceast\u0103 veste interesant\u0103.<\/p>\n\n\n\n

Ce este fuziunea nuclear\u0103?<\/h2>\n\n\n\n

Fuziunea nuclear\u0103 este un fel de proces nuclear care are loc atunci c\u00e2nd dou\u0103 sau mai multe nuclee atomice se combin\u0103 pentru a produce un singur nucleu mai mare. <\/p>\n\n\n\n

Reac\u021biile de fuziune au loc \u00eentr-o stare a materiei cunoscut\u0103 sub numele de plasm\u0103, care este un gaz fierbinte, \u00eenc\u0103rcat, compus din ioni pozitivi \u0219i electroni \u00een mi\u0219care liber\u0103, cu caracteristici diferite de cele ale solidelor, lichidelor sau gazelor. <\/p>\n\n\n\n

Pe scurt, fuziunea nuclear\u0103 este mecanismul prin care se produce fuziunea nuclear\u0103. Soarele \u0219i alte stele \u00ee\u0219i ob\u021bin energia<\/strong>.<\/p>\n\n\n\n

De exemplu: Atomii de tritiu \u0219i deuteriu (izotopi ai hidrogenului, hidrogenul 3 \u0219i, respectiv, hidrogenul 2) se combin\u0103 pentru a genera un neutron \u0219i un izotop al heliului. \u00cempreun\u0103 cu aceasta, se elibereaz\u0103 o cantitate masiv\u0103 de energie.<\/p>\n\n\n\n

Aceast\u0103 energie poate fi utilizat\u0103 pentru a crea electricitate sau pentru a alimenta alte lucruri. \u0218i este considerat\u0103 a fi o surs\u0103 de energie curat\u0103 \u0219i poten\u021bial infinit\u0103. <\/p>\n\n\n\n

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Pentru a fuziona, nucleele trebuie s\u0103 intre \u00een contact la temperaturi extraordinar de ridicate, poate 10 milioane de grade Celsius. Datorit\u0103 temperaturii ridicate, acestea au suficient\u0103 energie pentru a dep\u0103\u0219i rezisten\u021ba electric\u0103 reciproc\u0103. Atunci c\u00e2nd nucleele sunt foarte aproape unul de cel\u0103lalt, atrac\u021bia nuclear\u0103 dintre ele dep\u0103\u0219e\u0219te repulsia electric\u0103 \u0219i le permite s\u0103 fuzioneze \u0219i, ca rezultat, s\u0103 creeze energie.<\/p>\n\n\n\n

Fuziunea nuclear\u0103 vs. fisiunea nuclear\u0103<\/h2>\n\n\n\n

At\u00e2t fisiunea, c\u00e2t \u0219i fuziunea sunt reac\u021bii nucleare care schimb\u0103 atomii pentru a produce energie, dar care este diferen\u021ba dintre cele dou\u0103? <\/p>\n\n\n\n

Fuziunea reprezint\u0103 \u00eembinarea a doi atomi mai u\u0219ori pentru a produce un atom mai mare, \u00een timp ce fisiunea reprezint\u0103 \u00eemp\u0103r\u021birea unui atom \u00een dou\u0103. \u00cen esen\u021b\u0103, acestea sunt procese opuse.<\/p>\n\n\n\n

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Predic\u021bia lui Albert Einstein conform c\u0103reia masa poate fi transformat\u0103 \u00een energie a inspirat descoperirea diviziunii nucleului. Oamenii de \u0219tiin\u021b\u0103 au \u00eenceput s\u0103 fac\u0103 experimente \u00een 1939, iar Enrico Fermi a construit primul reactor nuclear un an mai t\u00e2rziu.<\/p>\n\n\n\n

Un izotop foarte instabil este aruncat \u00een aer cu particule de mare vitez\u0103, \u00een general, neutroni care sunt accelera\u021bi, for\u021b\u00e2ndu-i s\u0103 se ciocneasc\u0103 cu izotopul instabil, declan\u0219\u00e2nd fisiunea \u0219i sp\u0103rg\u00e2ndu-se \u00een doi izotopi mai mici, trei neutroni de mare vitez\u0103 \u0219i o cantitate imens\u0103 de energie. Uraniul-235 este utilizat ca neutron \u00een marea majoritate a reactoarelor nucleare. <\/p>\n\n\n\n

Energia generat\u0103 este utilizat\u0103 pentru a \u00eenc\u0103lzi apa \u00een reactoarele nucleare, care produc ulterior energie electric\u0103. \u00cen timp ce neutronii de mare vitez\u0103 sunt desc\u0103rca\u021bi \u0219i devin proiectile, ace\u0219tia declan\u0219eaz\u0103 noi procese de fisiune, cunoscute \u0219i sub numele de reac\u021bii \u00een lan\u021b. <\/p>\n\n\n\n

Fisiunea nuclear\u0103 genereaz\u0103 o cantitate mare de de\u0219euri radioactive, care pot fi periculoase \u0219i trebuie depozitate cu grij\u0103 - poate pentru sute de ani. \u00cen timp ce fuziunea nuclear\u0103 produce energie curat\u0103, f\u0103r\u0103 de\u0219euri radioactive.<\/p>\n\n\n\n

De asemenea, merit\u0103 subliniat faptul c\u0103 fisiunea nuclear\u0103 nu este un proces natural \u0219i trebuie s\u0103 fie indus\u0103, \u00een timp ce fuziunea nuclear\u0103 este un proces natural, de exemplu, soarele produce energie prin fuziune nuclear\u0103.<\/p>\n\n\n\n

De ce este important\u0103 fuziunea nuclear\u0103?<\/h2>\n\n\n\n

Reactoarele de fuziune au capacitatea de a furniza energie electric\u0103 cu emisii minime sau chiar f\u0103r\u0103 emisii de gaze cu efect de ser\u0103, de\u0219euri radioactive sau alte consecin\u021be asupra mediului. Acestea ar putea oferi o surs\u0103 practic nelimitat\u0103 de energie curat\u0103, reduc\u00e2nd dependen\u021ba noastr\u0103 de combustibilii fosili \u0219i de alte surse de energie limitate.<\/p>\n\n\n\n

Deoarece reactoarele de fuziune nu genereaz\u0103 de\u0219euri radioactive de nivel \u00eenalt, precum reactoarele de fisiune, eliminarea acestora va fi mai u\u0219oar\u0103. \u00cen plus, spre deosebire de reactoarele de fisiune, de\u0219eurile nu vor include elemente radioactive de calitate militar\u0103.<\/p>\n\n\n\n

Descoperire \u00een domeniul fuziunii nucleare <\/h2>\n\n\n\n

Potrivit Financial Times, oamenii de \u0219tiin\u021b\u0103 au reu\u0219it s\u0103 elibereze 2,5 MJ de energie dup\u0103 ce au folosit doar 2,1 MJ pentru a \u00eenc\u0103lzi combustibilul cu ajutorul laserelor. Aceast\u0103 descoperire trebuie s\u0103 fie validat\u0103 de National Ignition Facility (NIF) din cadrul Lawrence Livermore National Laboratory din California, dar este o veste fantastic\u0103.<\/p>\n\n\n\n

Aceasta este o realizare \u0219tiin\u021bific\u0103 semnificativ\u0103 \u00een domeniul fuziunii nucleare, \u00een primul r\u00e2nd pentru c\u0103 este prima dat\u0103 c\u00e2nd oamenii de \u0219tiin\u021b\u0103 au reu\u0219it s\u0103 stabileasc\u0103 un proces de fuziune nuclear\u0103 cu un c\u00e2\u0219tig net de energie pozitiv\u0103. <\/p>\n\n\n\n

Desigur, mai sunt \u00eenc\u0103 multe de f\u0103cut pentru ca aceast\u0103 op\u021biune s\u0103 devin\u0103 fezabil\u0103, dar faptul c\u0103 oamenii de \u0219tiin\u021b\u0103 au reu\u0219it s\u0103 genereze mai mult\u0103 energie dec\u00e2t atunci c\u00e2nd au \u00eenceput experimentul este un pas \u00eenainte semnificativ pentru \u0219tiin\u021b\u0103. Acest lucru ofer\u0103 context \u0219i semnifica\u021bie cercet\u0103rii.<\/p>\n\n\n\n

R\u0103sp\u00e2ndirea comunic\u0103rii \u0219tiin\u021bifice vizuale \u00een \u00eentreaga lume<\/h2>\n\n\n\n

R\u0103sp\u00e2ndi\u021bi-v\u0103 munca \u00een \u00eentreaga lume prin utilizarea de afi\u0219e vizuale. Pe l\u00e2ng\u0103 faptul c\u0103 v\u0103 face lucrarea mai potrivit\u0103 pentru o lectur\u0103 scurt\u0103, un poster creat cu pricepere v\u0103 poate ajuta s\u0103 ajunge\u021bi la un public pe care nu vi l-a\u021bi imaginat niciodat\u0103. Afi\u0219ele sunt mai u\u0219or de livrat \u0219i de diseminat \u0219i cu siguran\u021b\u0103 \u00eei pot face pe oameni s\u0103-\u0219i aminteasc\u0103 cercet\u0103rile dumneavoastr\u0103.<\/p>\n\n\n\n

Folosi\u021bi un instrument u\u0219or de creat afi\u0219e. Utiliza\u021bi Mind The Graph.<\/p>\n\n\n\n

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M\u0103re\u0219te-mi cercetarea cu ajutorul ilustra\u021biilor<\/a><\/div>\n<\/div>\n\n\n\n
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Oamenii de \u0219tiin\u021b\u0103 au realizat recent progrese \u00een domeniul fuziunii nucleare. Arunca\u021bi o privire la aceast\u0103 introducere u\u0219oar\u0103 pentru a afla totul despre aceasta.<\/p>","protected":false},"author":28,"featured_media":26279,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[959,28],"tags":[],"yoast_head":"\nNuclear Fusion: An easy-to-understand introduction<\/title>\n<meta name=\"description\" content=\"Scientists have recently achieved advances in nuclear fusion. 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