Unexpected dipole instabilities in small molecules after ultrafast XUV irradiation
P.-G. Reinhard, D. Dundas, P. M. Dinh, M. Vincendon, and E. Suraud
Phys. Rev. A 107, L020801 (2023) - Published 17 February, 2023
The authors show how ultrashort laser pulses can be used to almost immediately remove deep-lying electrons from small molecules. By suitably tuning the laser, the authors show that dipole instabilities can be driven whereby the dipole signal spontaneously reappears long after the original signal dies out. An experimental approach for observing these instabilities is proposed.
Measurements of electron bremsstrahlung double-differential cross sections for solid targets down to low photon energies: No polarization contribution
Ling Li, Zhu An, Jingjun Zhu, Weiping Lin, Scott Williams, Fan Bai, Peng Wang, Yixiang Fan, and Gen Liu
Phys. Rev. A 107, L020802 (2023) - Published 24 February, 2023
The authors measured the bremsstrahlung double-differential cross sections for some solid thin-film elemental targets by kilovolt electron impact down to low photon energies. The results definitely show that there is no polarization bremsstrahlung contribution in solid-target experiments.
Precision measurement of -ion and transition frequencies
P. Hao, K. Deng, F. F. Wu, Z. Y. Ma, W. Z. Wei, W. H. Yuan, Y. B. Du, H. L. Liu, H. X. Zhang, L. R. Pang, B. Wang, J. Zhang, and Z. H. Lu
Phys. Rev. A 107, L020803 (2023) - Published 27 February, 2023
The authors report the precision measurement of Mg ion-doublet transition frequencies using a decoherence-assisted spectroscopy method with the full use of spontaneous emission signals to improve the detection sensitivity. The results indicate that consideration of additional physical effects in theoretical calculations, such as the possible capture of electron correlations, is required.
















