Talk:Hyperpolarization (physics)

confusing

The "explanation" is using a wording that makes it not understandable for non professionals maybe even for them. — Preceding unsigned comment added by Jangirke (talk • contribs) 18:50, 31 January 2014 (UTC)

As a professional in this field, I'll say that this is the standard intro that one would give to this concept, more or less. The idea of hyperpolarization may not be easy to understand without first understanding the concept of polarization in general (and of thermal polarization), but with that concept understood, it seems straightforward enough. I imagine that it is also difficult to understand the concept of Diffeomorphism just by reading the introductory sentence of the wikipedia article, but as in this article, there are pipelinks that are useful in clarifying the core concepts, I think that's about all we can ask for in situations like this.

This misses the point altogether, and more pertinently, misunderstands the target-audience for Wikipedia articles. JohndanR (talk) 16:30, 29 January 2022 (UTC)

That said, I'm think the concept of hyperpolarization might be more general than its application to nuclear spins (though I'm having trouble coming up with any obvious counter-examples), so we may want to broaden the language a bit. I'd also say that an expanded "background" section is justified. 0x0077BE (talk) 23:42, 3 February 2014 (UTC)

Article certainly is confusing. One reason, as a general article on "hyperpolarization (physics)", it ignores quite a lot of solid state physics. See for example Wind, R.A.; Duijvestijn, M.J.; Van Der Lugt, C.; Manenschijn, A.; Vriend, J. (1985). "Applications of dynamic nuclear polarization in ¹³C NMR in solids". Progress in Nuclear Magnetic Resonance Spectroscopy. 17: 33–67. doi:10.1016/0079-6565(85)80005-4. Curiously, the hyperpolarization via DNP is mentioned for small molecules by freezing them in a solid matrix containing a radical. Perhaps the article should be retitled or subsumed into another that specifically discusses biomedical applications like the hyperpolarization of gases. In any case article needs revision. Tachyon (talk) 16:18, 16 February 2019 (UTC)

Spin-exchange

The article says “The angular momentum is transferred from the alkali metal electrons to the noble gas nuclei through collisions.” Can this be true? The electrons of the alkali metal collide with the noble gas nuclei? Appears very strange to me.--141.3.200.233 (talk) 09:05, 1 July 2015 (UTC)

It is true, but the article does not explain that the alkali metal, e.g. Rb, is in the vapor phase. See Rice, Charles V.; Raftery, Daniel (2002). "Rubidium–xenon spin exchange and relaxation rates measured at high pressure and high magnetic field". J. Chem. Phys. 117: 5632. doi:10.1063/1.1500733. Tachyon (talk) 12:56, 22 May 2019 (UTC)

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"To explain...easier,"

The following 'explanation' is suitable only for post-grads, and the grammar of that introductory clause is appropriate only to children. The whole thing is a pedagogical nightmare and needs to be cleaned up so that it can be understood more easily. JohndanR (talk) 16:35, 29 January 2022 (UTC)