Required Laser Intensity Research Articles

Stimulation of beta-decay by laser radiation

This paper deals with the study of new beta-decay acceleration mechanisms. Estimations have proved that there is a real possibility for stimulated beta-decay detection. The required laser intensity has been achieved by now. The mechanism under discussion may be characterized as the opposite process of K-electron capture. This paper makes an essential distinction between the above-mentioned mechanism and other beta-decay acceleration mechanisms.

Prospects for an atomic parity-violation experiment in U90+

Parity mixing of electron states should be extremely strong for heliumlike uranium. We calculate its size and discuss whether it could be determined experimentally. We analyze one specific scheme for such an experiment. The required laser intensities for two-photon spectroscopy of the ${2}^{3}$${\mathit{P}}_{0}$--2 $^{1}$${\mathit{S}}_{0}$level splitting is of the order of ${10}^{17}$ W/${\mathrm{cm}}^{2}$. A determination of parity mixing would require at least ${10}^{21}$ W/${\mathrm{cm}}^{2}$.

A one-dimensional microscopic quantum mechanical theory of light enhanced desorption

A one-dimensional microscopic quantum mechanical model is used to inquire whether it is possible to enhance the desorption rate by employing a laser to induce vibrational excitation of the chemisorptive bond. For model parameters simulating CO/Cu it is found that the required laser intensity is very large, roughly 10 4 times that of a conventional high power CO 2 laser (whose intensity we take to be 5 × 10 10 W cm 2 ). We suggest that surface roughness can be used to enhance substantially the effect of the laser and possibly to enable the observation of laser enhanced desorption.

The Instability of Molecules in Laser Field and Isotope Separation

Abstract In the present paper the nonlinear differential equation describing the selective decomposition of a molecule as an unimolecular reaction has be deduced from the usual time dependent semi-classical Schroedinger Equation. The selective conditions for the instability of a molecule are discussed. The thresholds of the required laser intensities for ICl and HCl diatomic molecules are estimated respectively, where one type of isotope molecules ought to be decomposed for hundred per cent in a laser pulse for different pulse widths. And possibly selective decomposition of the molecule without permanent dipole moment by Raman process is also discussed briefly.

Production of Electron Pairs from a Zero-Mass State

Results are presented for the production of electron pairs by the collision of high-energy bremsstrahlung and high-intensity laser beams. With Stanford linear accelerator bremsstrahlung parameters, it is found that the laser must be focused to about ${10}^{18}$ W/${\mathrm{cm}}^{2}$ to produce pairs. Approximately 25 laser photons participate in each event, and the required laser intensity is outside the known radius of convergence of perturbation theory for this process. The electron mass shift may also be determined.