| dbo:abstract |
In nuclear physics, a beta decay transition is the change in state of an atomic nucleus undergoing beta decay. (β-decay) When undergoing beta decay, a nucleus emits a beta particle and a corresponding neutrino, transforming the original nuclide into one with the same mass, but differing charge. (an isobar) There are several types of beta decay transition. In a Fermi transition, the spins of the two emitted particles are anti-parallel, for a combined spin . As a result, the total angular momentum of the nucleus is unchanged by the transition. By contrast, in a Gamow-Teller transition, the spins of the two emitted particles are parallel, with total spin , leading to a change in angular momentum between the initial and final states of the nucleus. The theoretical work in describing these transitions was done between 1934 and 1936 by George Gamow and Edward Teller at George Washington University. (en) 伽莫夫 - 泰勒跃迁是一个属于一种β衰变，其中，发射的电子（正电子）和反中微子（中微子）的自旋耦合为，导致初态和末态的角动量变化 ，这是相对于费米跃迁来说的，其中的发射粒子的自旋耦合到 ，初态和末态的角动量自旋不变。伽莫夫 - 泰勒跃迁和费米跃迁对应于两种不同形式的非相对论极限下的弱相互作用哈密顿量主导作用： = 质子到中子的同位旋过渡矩阵，反之亦然。 = 泡利自旋矩阵，得 。 = 旋转空间的恒等算子, 使得 不变。 = 弱矢量耦合常数。 =弱轴矢量耦合常数。 (zh) |
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| rdfs:comment |
伽莫夫 - 泰勒跃迁是一个属于一种β衰变，其中，发射的电子（正电子）和反中微子（中微子）的自旋耦合为，导致初态和末态的角动量变化 ，这是相对于费米跃迁来说的，其中的发射粒子的自旋耦合到 ，初态和末态的角动量自旋不变。伽莫夫 - 泰勒跃迁和费米跃迁对应于两种不同形式的非相对论极限下的弱相互作用哈密顿量主导作用： = 质子到中子的同位旋过渡矩阵，反之亦然。 = 泡利自旋矩阵，得 。 = 旋转空间的恒等算子, 使得 不变。 = 弱矢量耦合常数。 =弱轴矢量耦合常数。 (zh) In nuclear physics, a beta decay transition is the change in state of an atomic nucleus undergoing beta decay. (β-decay) When undergoing beta decay, a nucleus emits a beta particle and a corresponding neutrino, transforming the original nuclide into one with the same mass, but differing charge. (an isobar) The theoretical work in describing these transitions was done between 1934 and 1936 by George Gamow and Edward Teller at George Washington University. (en) |
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Gamow-Teller-Übergang (de) Beta decay transition (en) 伽莫夫 - 泰勒跃迁 (zh) |
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