Uhlelo Lokuhlola lwe-LADP-1A lwe-CW NMR – Imodeli Ethuthukisiwe

Incazelo emfushane:

I-nuclear magnetic resonance (NMR) uhlobo lokuguquguquka kwe-resonance okubangelwa yigagasi le-electromagnetic ensimini yamagnetic engaguquki. Selokhu lezi zifundo zenziwa ngo-1946, izindlela namasu e-nuclear magnetic resonance (NMR) athuthukiswe ngokushesha futhi asetshenziswa kabanzi ngoba angangena ngokujulile entweni ngaphandle kokubhubhisa isampula, futhi abe nezinzuzo zokushesha, ukunemba kanye nesinqumo esiphezulu. Namuhla, angene kusukela ku-physics kuya ku-chemistry, i-biology, i-geology, ukwelashwa, izinto zokwakha kanye neminye imikhakha, edlala indima enkulu ocwaningweni lwesayensi nasekukhiqizweni.

Sithumelele i-imeyili

Imininingwane Yomkhiqizo

Amathegi Omkhiqizo

Incazelo

Ingxenye ongayikhetha: Imitha yemvamisa, i-oscilloscope yengxenye ozilungiselele yona

Lolu hlelo lokuhlola lwe-continuous-wave nuclear magnetic resonance (CW-NMR) luqukethe i-homogeneity magnet ephezulu kanye neyunithi yomshini oyinhloko. I-permanent magnet isetshenziselwa ukuhlinzeka nge-primary magnetic field ebekwe yi-adjustable electromagnetic field, ekhiqizwa yi-pair of coils, ukuvumela ukulungiswa okuncane kwe-total magnetic field kanye nokubuyisela ukuguquguquka kwe-magnetic field okubangelwa ukushintshashintsha kwezinga lokushisa.

Ngenxa yokuthi kudingeka ugesi omncane kakhulu we-magnetizing ukuze kusetshenziswe insimu kagesi ephansi, inkinga yokushisa yesistimu iyancishiswa. Ngakho-ke, uhlelo lungasetshenziswa ngokuqhubekayo amahora amaningana. Luyithuluzi elifanele lokuhlola lama-laboratory e-physics athuthukile.

Ukuhlolwa

1. Ukubuka isimo se-nuclear magnetic resonance (NMR) se-hydrogen nuclei emanzini nokuqhathanisa ithonya lama-ion e-paramagnetic;

2. Ukukala amapharamitha e-hydrogen nuclei kanye ne-fluorine nuclei, njenge-spin magnetic ratio, i-Lande g factor, njll.

Imininingwane

Incazelo	Imininingwane
I-nucleus elinganisiwe	U-H no-F
I-SNR	> 46 dB (H-nuclei)
Imvamisa ye-oscillator	17 MHz kuya ku-23 MHz, ingalungiseka njalo
Indawo yesigxobo sikamazibuthe	Ububanzi: 100 mm; isikhala: 20 mm
Ukuphakama kwesiginali ye-NMR (ukuphakama kuya phezulu)	> 2 V (H-nuclei); > 200 mV (F-nuclei)
Ukufana kwensimu yamagnetic	kungcono kune-8 ppm
Ububanzi bokulungiswa kwensimu kagesi	AmaGauss angu-60
Inani lamagagasi e-coda	> 15