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Units in quantum mechanical problem about 4-He
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[QUOTE="physicsisgreat, post: 4976927, member: 538681"] [h2]Homework Statement [/h2] Units of the problem are chosen to be such as K[SUB]B[/SUB] = 1 and ħ = 1 so that energies are expressed in Kelvin and lengths in Å. The professor says the resulting value of ħ[SUP]2[/SUP] / 2 m for a 4-He atom is 6.0599278: how is that possibile? [h2]Homework Equations[/h2] Natural units websites give many conversion factors: [URL]https://thespectrumofriemannium.wordpress.com/2013/01/30/log070-natural-units/[/URL] [URL]http://en.wikipedia.org/wiki/Natural_units[/URL] [h2]The Attempt at a Solution[/h2] as the 4-He mass is m ≈ 6 * 10[SUP]-27[/SUP] Kg ħ[SUP]2[/SUP] / 2 m ≈ 8,4 * 10^[SUP]-43[/SUP] m[SUP]2[/SUP]/s Now using conversions of meters and seconds to eV (given at [URL]https://thespectrumofriemannium.wordpress.com/2013/01/30/log070-natural-units/[/URL]) we find m[SUP]2[/SUP]/s ≈ 0,0169 so the result is wrong. I tried in many other ways, starting for example from ħ = 1 and converting the 4-He mass, but I cannot find any way to get the result ħ[SUP]2[/SUP] / 2 m ≈ 6.0599278 Thank you very much in advance for your help! [/QUOTE]
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Units in quantum mechanical problem about 4-He
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