Department of Chemistry, Visva-Bharati, Santiniketan 731 235, India.
Phys Chem Chem Phys. 2011 May 28;13(20):9445-51. doi: 10.1039/c1cp20155g. Epub 2011 Apr 11.
In this paper we have investigated the effect of a magnetic field on the barrier crossing rate of a charged particle. At the low friction regime we have observed a new turnover phenomenon for the variation of rate as a function of field strength. Thus although the force due to the magnetic field is not dissipative in nature, it plays a role in the steady state barrier crossing rate similar to that of a dissipative force in the weak damping regime. For appreciable damping strength, the rate monotonically decreases with the increase of field strength. We have demonstrated an interesting resonance effect due to the variation of frequency of the harmonic oscillator associated with the y-component motion at low damping and magnetic field strength.
在本文中，我们研究了磁场对带电粒子势垒穿越率的影响。在低摩擦条件下，我们观察到速率随场强变化的新的转折现象。因此，尽管磁场力本质上不是耗散的，但它在稳态势垒穿越率中起着类似于弱阻尼条件下耗散力的作用。对于可观的阻尼强度，速率随场强的增加单调减小。我们在低阻尼和磁场强度下，由于与 y 分量运动相关的简谐振荡器的频率变化，演示了一个有趣的共振效应。
