Hyperfine-induced depolarization effect in the X-ray line emission 1s2p3P2→1s21S0 of He-like ions

• Published in: The European physical journal. D, Atomic, molecular, and optical physics Vol. 75; no. 6
• Main Authors: Bensaid, R., Ferouani, A. K., Sahlaoui, M.
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 2021; Springer Nature B.V
• Subjects: Applications of Nonlinear Dynamics and Chaos Theory; Atomic; Depolarization; Electric dipoles; Interference; Linear polarization; Manganese; Molecular; Niobium; Nuclear spin; Optical and Plasma Physics; Physical Chemistry; Physics; Physics and Astronomy; Quadrupoles; Quantum Information Technology; Quantum Physics; Regular Article - Atomic Physics; Spectroscopy/Spectrometry; Spintronics
• DOI: 10.1140/epjd/s10053-021-00190-9
• EISSN: 1434-6079
• ISSN: 1434-6060

The degree of linear polarization of the line
x
corresponding to the transition
1
s
2
p
3
P
2
→
1
s
2
1
S
0
is considered for Helium-like ions with non-zero nuclear spin. We are interested in this paper to seven ions: P
13
+
, V
21
+
, Mn
23
+
, As
31
+
, Rb
35
+
, Y
35
+
and Nb
39
+
which are excited by electrons beam. In such ions, two kind of transitions occurs in the line
x
: the hyperfine-induced electric dipole E1 transition and the magnetic quadrupole M2 transition. From our results, we find that when we take into account this two kind of transitions without interference between the two channels E1 and M2, this leads to a drastic depolarization. However, the consideration of the interference effect leads to an increase in the polarization degree, slight for the whole line
x
and substantial for its individual hyperfine components.
Graphic Abstract