共查询到20条相似文献,搜索用时 78 毫秒
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实验数据的处理是大学物理实验的一个重要环节,数据处理的准确程度直接影响学生实验的质量.学生常用的计算器虽然价廉、便携,但是无法显示计算过程,且不具备绘图、曲线方程拟合等高级功能.Origin软件是美国Microcal公司推出的一款功能强大的数据分析、处理和绘图软件.本文利用Origin7.5软件对“动态法测量杨氏模量实验”中的实验数据进行处理,并对产生的图像进行分析和拟合,从而快速、准确地得出实验结论. 相似文献
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自旋回波的简易观测方法及共振弛豫分析 总被引:7,自引:2,他引:5
在脉冲核磁共振实验中,通常采用自旋回波法测量共振弛豫时间,但模拟示波器观测难以获得准确的实验数据.通过对计算机标准配置资源声卡的性能检测及标定,使其达到物理实验测量数据定量分析的教学要求,同时利用免费的简易程序实现多通道数字信号采集功能并用于观测记录脉冲核磁共振信号.配合实验操作技术改进,既准确地测量了横向弛豫时间,又展现了符合物理实验教学的计算机应用方法. 相似文献
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物理、电子教学中,很多实验和演示实验都要使用多用表,传统的指针式多用表精度低,灵敏度低,测量结果不准确,实验效果不明显.而数字多用表能将测量结果在显示屏或者电脑上显示出来,精度高,读数准确,易读,直观性强,同时功能强大,不但能测量交直流电压、电流、电阻、二极管、 相似文献
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A STUDY OF THE PHYSICAL PROPERTIES OF ZEEMAN ABSORPTION FARADAY ANOMALOUS DISPERSION OPTICAL FILTER 下载免费PDF全文
This paper reports what is to our knowledge the first demonstration of Zeeman absorption Faraday anomalous dispersion optical filter (hereafter abbreviated to FADOF/Zeeman). The mutual relations among passband, tuning capability, cell temperature and magnetic field of FADOF/Zeeman have been studied theoretically and experimentally. The results showed that the single passband of FADOF/Zeeman was about 1 GHz, which is 3 times less than the passband of FADOF. The tuning capability was about 1 GHz/0.01 T. 相似文献
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DONG Zhengchao 《中国科学G辑(英文版)》2006,49(5)
We study the Zeeman effect on the d-wave superconductor and tunneling spectrum in normal-metal(N)/d-wave superconductor(S) junction by applying a Zeeman magnetic field to the S. It is shown that: (1) the Zeeman magnetic field can lead to the S gap decreasing, and with the increase in Zeeman energy, the superconducting state is changed to the normal state, exhibiting a first-order phase transition; (2) the Zeeman energy difference between the two splitting peaks in the conductance spectrum is equal to2h0 (h0 is the Zeeman energy); (3) both the barrier strength of interface scattering and the temperature can lower the magnitudes of splitting peaks, of which the barrier strength can lead to the splitting peaks becoming sharp and the temperature can smear out the peaks,however, neither of them can influence the Zeeman effect. 相似文献
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A single-mode frequency stabilized laser with modulation-free and moderate power is desired as a light source for an ultra-high resolution interferometer system and/or a rapid laser calibration system. For this purpose, we developed a new stabilized laser system that utilizes intermittent control of a 2 mW transverse Zeeman stabilized He-Ne laser (Zeeman laser) with an iodine stabilized He-Ne laser (I2 stabilized laser). Because of the intermittent control, working time of the I2 stabilized laser is reduced. The Zeeman laser has two operational modes: independent and slave mode. In the independent mode, the Zeeman laser is stabilized through control of Zeeman beat frequency. Temperature dependent drift of the oscillation frequency during the independent mode is periodically corrected by the slave operation utilizing frequency offset locking to the I2 stabilized laser. Frequency instability of the Zeeman laser in independent and slave modes is 7.7X10-11 and 2.0X10-11, respectively, at the sampling time of 100 s. 相似文献
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We report magnetic confinement of neutral, ground state OH at a density of approximately 3 x 10(3) cm(-3) and temperature of approximately 30 mK. An adjustable electric field sufficiently large to polarize the OH is superimposed on the trap in various geometries, making an overall potential arising from both Zeeman and Stark effects. An effective molecular Hamiltonian is constructed, with Monte Carlo simulations accurately modeling the observed single-molecule dynamics in various trap configurations. Magnetic trapping of cold polar molecules under adjustable electric fields may enable study of low energy dipolar interactions. 相似文献
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L. Nordborg M. Dronjak K. Gramm S.P. Hörnfeldt 《Journal of magnetism and magnetic materials》1981,23(3):323-332
The Zeeman splitting of conduction electrons in platinum with nickel or iron impurities has been studied using the de Haas-van Alphen effect. It is found that 200 ppm iron increases the Zeeman splitting by about 15%, while nickel up to 2000 ppm has no detectable influence on the Zeeman splitting. 相似文献
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Dong Zhengchao 《中国科学G辑(英文版)》2006,49(5):597-605
We study the Zeeman effect on the d-wave superconductor and tunneling spectrum in normal-metal(N)/d-wave superconductor(S) junction by applying a Zeeman magnetic field to the S. It is shown that: (1) the Zeeman magnetic field
can lead to the S gap decreasing, and with the increase in Zeeman energy, the superconducting state is changed to the normal
state, exhibiting a first-order phase transition; (2) the Zeeman magnetic field may make the zero-bias conductance peak split
into two peaks, and the energy difference between the two splitting peaks in the conductance spectrum is equal to 2h
0 (h
0 is the Zeeman energy); (3) both the barrier strength of interface scattering and the temperature can lower the magnitudes
of splitting peaks, of which the barrier strength can lead to the splitting peaks becoming sharp and the temperature can smear
out the peaks, however, neither of them can influence the Zeeman effect. 相似文献
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在超导中通过外加塞曼磁场,研究正常金属/超导/正常金属双隧道结中的量子相干输运。同时考虑从一个正常金属电极注入一电子,从另一个正常金属电极注入一空穴,推导出系统的微分电导的一般公式。研究表明,电导谱随偏压展示振荡行为,随着温度和磁场的增大,其振荡振幅被降低,且塞曼能可导致电导峰的塞曼劈裂。在隧道极限下,超导体中会形成一系列束缚态。 相似文献
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Spin-1 condensates in the polar (antiferromagnetic) phase in two dimensions are shown to undergo a transition of the Ising type, in addition to the expected Kosterlitz-Thouless (KT) transition of half-vortices, due to the quadratic Zeeman effect. We establish the phase diagram in terms of temperature and the strength of the Zeeman effect using Monte Carlo simulations. When the Zeeman effect is sufficiently strong, the Ising and KT transitions meet. For very strong Zeeman field the remaining transition is of the familiar integer KT type. 相似文献
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S. Singh V. B. Tiwari S. R. Mishra H. S. Rawat 《Journal of Experimental and Theoretical Physics》2018,126(4):441-445
We report the studies on the effect of Zeeman slower beam power on the loading rate and collision loss rate in an atomic beam loaded krypton magneto-optical trap (MOT). The results show that an increase in Zeeman slower beam power initially increases the MOT loading rate and reduces the background collision loss rate to increase the number of cold atoms in the MOT to an optimum value. With further increase in the Zeeman slower beam power, the number of cold atoms in the MOT decreases due to increased background collision loss rate and decrease in the trap loading rate. However, the cold collision loss rate is observed to remain unaffected by the variation in the Zeeman slower beam power. Therefore, the study emphasizes the need to optimize the Zeeman slower beam power to trap maximum number of cold atoms in an atomic beam loaded MOT. 相似文献