Numerical simulation on highly efficient isotope separation using terahertz wave

Yokoyama, Keiichi  ; Hashimoto, Masashi; Matsuoka, Leo; Kasajima, Tatsuya

Enhancement of isotope separation by a phase-locked pulse train of terahertz wave is numerically demonstrated by solving close-coupling time-dependent Schroedinger equations. The terahertz wave is transform-limited and has the center frequency of 0.5 THz with the bandwidth of 0.55 THz FWHM. Individual pulse energy is 1.56 J. Irradiation of 16 such pulses to lithium chloride vapor is simulated at 70 K. At the pulse interval of 24.04 ps, the rotational state distribution of LiCl is largely displaced, while that of LiCl is not. Assuming multi-photon decomposition as a subsequent process, the enrichment factor is calculated and found to be enhanced by three orders of magnitude, while decomposition probability of the target isotope is kept up 0.3.