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ħ½ÇÐýתºË´Å¹²Õñ²¨Æ×·¨ NMRÖÐÓÐħ½ÇЧӦ£¨magic angle effect£© ħ½ÇÐýת¼¼Êõ£¨magic-angle spinning£© |
4Â¥2021-03-10 10:28:06
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2Â¥2021-03-09 22:54:20
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3Â¥2021-03-10 08:06:53
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https://en.jinzhao.wiki/wiki/Magic_angle The magic angle is a precisely defined angle, the value of which is approximately 54.7356¡ã. The magic angle is a root of a second-order Legendre polynomial, P2(cos ¦È) = 0, and so any interaction which depends on this second-order Legendre polynomial vanishes at the magic angle. This property makes the magic angle of particular importance in magic angle spinning solid-state NMR spectroscopy. In magnetic resonance imaging, structures with ordered collagen, such as tendons and ligaments, oriented at the magic angle may appear hyperintense in some sequences; this is called the magic angle artifact or effect. |
5Â¥2021-03-10 10:37:07













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