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Updated: Jul 21, 2026

Blast Quantification Using Hopkinson Pressure Bars
09:41

Blast Quantification Using Hopkinson Pressure Bars

Published on: July 5, 2016

间接核旋转-旋转合张力器的周期趋势:对于介质二氧化的相对论密度函数计算

David L Bryce1, Roderick E Wasylishen, Jochen Autschbach

  • 1Department of Chemistry, Dalhousie University, Halifax, Nova Scotia, Canada.

Journal of the American Chemical Society
|April 25, 2002
PubMed
概括

使用ZORA-DFT的相对论计算准确地预测了二原子素中的核自旋-自旋合 (J) 张量. 这些J张量显示了原子数的线性趋势,突出显示了重原子自旋轨道效应的重要性.

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Atomic Nuclei: Nuclear Spin State Population Distribution

Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
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The earth's gravitational field produces a 'twisting force' perpendicular to the angular momentum of a spinning mass (such as a spinning top) that causes the mass to 'wobble' around the gravitational field axis in a phenomenon called precession. Similarly, the magnetic moment (μ) of a spinning nucleus precesses due to an external magnetic field directed along the z-axis. The precession of the magnetic moment vector about the magnetic field is called Larmor precession, and the angular frequency...
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Spin–Spin Coupling Constant: Overview

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