LADP-1A Pūnaehana Hoʻokolohua o CW NMR – Kiʻi Hōʻike Hōʻikeʻike Kiʻekiʻe

LADP-1A Pūnaehana Hoʻokolohua o CW NMR - Kūlana Kiʻekiʻe

ʻO ka wehewehe pōkole:

ʻO ka nuclear magnetic resonance (NMR) kahi ʻano o ka hoʻololi ʻana i ka resonance i hoʻokumu ʻia e ka nalu electromagnetic i loko o kahi māla mau. Mai ka wā i hana ʻia ai kēia mau haʻawina i ka makahiki 1946, ua hoʻomohala wikiwiki ʻia nā ʻano a me nā ʻenehana o ka nuclear magnetic resonance (NMR) no ka mea hiki iā lākou ke komo hohonu i loko o ka waiwai me ka ʻole o ka luku ʻana i ka hāpana, a loaʻa nā pono o ka wikiwiki, pololei a me ka hoʻonā kiʻekiʻe. I kēia mau lā, ua komo lākou mai ka physics a hiki i ka chemistry, biology, geology, lāʻau lapaʻau, nā mea a me nā ʻoihana ʻē aʻe, e pāʻani nui ana i ka noiʻi ʻepekema a me ka hana ʻana.

E hoʻouna i ka leka uila iā mākou

Huahana Huahana

wehewehe

Mahele koho: ʻO ka mika pinepine, ʻāpana oscilloscope hoʻomākaukau ponoʻī

ʻO kēia ʻōnaehana hoʻokolohua o ka hoʻomau mau ʻana o ka nuclear magnetic resonance (CW-NMR) me kahi magnet homogeneity kiʻekiʻe a me kahi ʻāpana mīkini nui. Hoʻohana ʻia kahi magnet paʻa no ka hāʻawi ʻana i kahi māla magnetic mua i hoʻopaʻa ʻia e kahi māla electromagnetic hiki ke hoʻololi ʻia, i hana ʻia e nā coils ʻelua, e ʻae i ka hoʻoponopono maikaʻi ʻana i ka huina magnetic a e hoʻopaʻi i ka fluctuations o ke kahua magnetic i hoʻokumu ʻia e nā ʻano wela.

No ka mea e pono ai ke au magnetizing liʻiliʻi no ke kahua electromagnetic haʻahaʻa, hoʻemi ʻia ka pilikia wela o ka ʻōnaehana. No laila, hiki ke hoʻohana mau ʻia ka ʻōnaehana no kekahi mau hola. He mea hana hoʻokolohua maikaʻi loa ia no nā laboratories physics kiʻekiʻe.

Hoao

1. No ka nānā 'ana i ka nuclear magnetic resonance (NMR) hanana o ka hydrogen nuclei i loko o ka wai a ho'ohālikelike i ka mana o nā ion paramagnetic;

2. No ke ana i na palena o ka hydrogen nuclei a me ka fluorine nuclei, e like me ka spin magnetic ratio, Lande g factor, etc.

Nā kikoʻī

wehewehe	Hōʻike
Ana nucleus	H a me F
SNR	> 46 dB (H-nuclei)
Oscillator frequency	17 MHz a 23 MHz, hiki ke hoʻololi mau ʻia
ʻĀpana o ka pou magnet	Anawaena: 100 mm; kaawale: 20 mm
NMR hōʻailona amplitude (peak to peak)	> 2 V (H-nuclei); > 200 mV (F-nuclei)
Homogeneity o ke kahua magnetic	ʻoi aku ka maikaʻi ma mua o 8 ppm
Ka laulā hoʻololi o ke kahua electromagnetic	60 Gauss
Ka helu o nā nalu coda	> 15