Magnetic quadrupole (M2) X-ray laser transitions from neon-like arsenic As+23

Abstract

Neon-like arsenic As+23 are studied theoretically where 457 energy levels are calculated. Highly energetic electrons are considered as the main pumping source for the population of the energy levels. Relativistic calculations are considered through calculations, and the possible X-ray laser transitions are determined with their gain coefficients. The soft X-ray laser transitions (λ ≈ 17–27 nm) are dominated by the magnetic quadrupole M2. The results show good agreement with the observed data and, moreover, new transitions that are not given in the literature are calculated together with their gain values.