LADP-1 Sistimi ea Teko ea CW NMR - Moetso o tsoetseng pele
Nuclear magnetic resonance (NMR) ke mofuta oa phetoho ea molumo o bakiloeng ke leqhubu la motlakase ka har'a matla a khoheli a sa feleng. Ho tloha ha lithuto tsena li etsoa ka 1946, mekhoa le mahlale a matla a khoheli a nyutlelie a ntlafalitsoe ka potlako mme a sebelisoa haholo hobane a ka kenella botebong ba ntho ntle le ho senya sampole, mme a ba le melemo ea ho potlaka, ho nepahala le ho phahama qeto. Matsatsing ana, ba phunyeletse ho tloha fisiks ho ea ho k'hemistri, baeloji, jioloji, kalafo ea bongaka, thepa le likarolo tse ling, ba bapala karolo e kholo ho lipatlisiso tsa mahlale le tlhahiso.
Tlhaloso
Karolo ea boikhethelo: Frequency meter, oscilloscope e ikemetseng
Sistimi ena ea liteko ea maqhubu a matla a nyutlelie a tsoelang pele (CW-NMR) a na le makenete a phahameng a homogeneity le mochini o ka sehloohong oa mochini. Ho sebelisoa makenete ea ka ho sa feleng ho fana ka matla a khoheli a kaholimo-limo a phahamisitsoeng ke tšimo e ka fetoloang ka motlakase, e hlahisoang ke likhoka, ho lumella phetoho e ntle ho matla a khoheli kaofela le ho lefella ho fetoha hoa makenete ho bakoang ke ho fapana hoa mocheso.
Hobane ho hlokahala matla a manyane feela a khoheli bakeng sa tšimo e nang le motlakase o monyane haholo, bothata ba ho futhumatsa ba sistimi bo fokotsoa. Kahoo, sistimi e ka sebetsoa khafetsa ka lihora tse 'maloa. Ke sesebelisoa se loketseng sa liteko bakeng sa lilaboratori tsa fisiks tse tsoetseng pele.
Litlhaloso
Tlhaloso |
Ga tlhaloso |
Mokokotlo o lekantsoeng | H le F |
SNR | > 46 dB (H-nuclei) |
Maqhubu a Oscillator | 17 MHz ho 23 MHz, e ka feto-fetoha khafetsa |
Sebaka sa palo ea makenete | Bophara: 100 mm; sekgeo: 20 mm |
Matšoao a NMR (tlhoro ho fihla tlhoro) | > 2 V (H-nuclei); > 200 mV (F-nuclei) |
Homogeneity ea matla a khoheli | e betere ho feta 8 ppm |
Liphetoho mefuta e fapaneng ea tšimo ea motlakase | 60 Gauss |
Palo ea maqhubu a coda | > 15 |
Teko
1. Ho shebella ts'ebetso ea nyutlelie ea matla a khoheli (NMR) ea nuclei ea hydrogen ka metsing le ho bapisa tšusumetso ea li-ion tsa paramagnetic;
2. Ho lekanya likarolo tsa hydrogen nuclei le fluorine nuclei, joalo ka spin magnetic ratio, Lande g factor, jj.