Measurement of spin precession angles of resonant tunneling neutrons (「冷中性子スピン干渉実験の進展とその応用(3)」ワークショップ--干渉性研究と冷中性子スピン干渉実験(3))

Measurement of spin precession angles of resonant tunneling neutrons (「冷中性子スピン干渉実験の進展とその応用(3)」ワークショップ--干渉性研究と冷中性子スピン干渉実験(3))
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共振隧道中子自旋进动角测量(“冷中子自旋干涉实验进展及其应用(三)”工作坊--相干性研究与冷中子自旋干涉实验(三))

DOI:
10.1103/physreva.61.013607
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发表时间:
1999
期刊:
--
影响因子:
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通讯作者:
Seiji Tasaki
Seiji Tasaki
中科院分区:
--
文献类型:
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作者:
日野 正裕;Norio Achiwa;Seiji Tasaki

文献摘要

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在n=1,2,10的情况下,我们成功地测量了隧穿和非隧穿中子的自旋进动角。这些势垒分别由一个[Permolloy 45(PA)−Ge r m a n i u m(Ge)]n−PA法布里-珀罗磁性薄膜谐振器表示的双矩形、三矩形和多矩形势垒表示。由法布里-珀罗谐振腔产生的自旋-进动角显示了作为入射角的函数的振荡曲线,并且基于一维薛定谔方程的↑和↓自旋中子波函数的理论相位差很好地再现了该曲线。我们证明,尽管透射率保持不变,但曲线的幅度与锗层(井)的数目成正比。
We have succeeded in precisely measuring spin-precession angles of tunneling and nontunneling neutrons through double-rectangular, triple-rectangular, and multirectangular potential barriers represented by a [Permalloy 45 (PA)− g e r m a n i u m (Ge)] n− PA Fabry-Perot magnetic thin-film resonator for n= 1, 2, and 10, respectively. The spin-precession angle due to the Fabry-Perot resonator shows the oscillation curve as a function of the incident angles, and the curve is well reproduced by the theoretical phase difference of↑ and↓ spin neutron wave functions based on the one-dimensional Schrödinger equation. We demonstrate that the amplitude of the curve is proportional to the number of germanium layers (wells) although the transmission probability remains constant.