Observation of a spin-orbit-induced forbidden x-ray transition in lithiumlike magnesium

Journal Article · Thu Nov 01 04:00:00 EST 1979 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.20.1972· OSTI ID:5909577

Mowat, J R; Jones, K W; Johnson, B M

High-resolution spectra of delayed x rays emitted by fast foil-excited magnesium ions are found to contain a feature at 1321.45 +- 0.74 eV. That energy is in good agreement with previously measured photon energies for the spin-forbidden radiative transitions (1s2p/sup 2/) /sup 4/P/sup tse/..-->.. (1s /sup 2/2p) /sup 2/P/sup tso/ and (1s2s2p) /sup 4/P/sup tso/..-->.. (1s/sup 2/2s) /sup 2/S/sup e/ in the three-electron ion. Time-of-flight decay curves taken at 25- and 50-MeV ion energies yield a 170 +- 13 ps lifetime, in good agreement with a recently published theoretical value of 169 ps for the (1s2p/sup 2/) /sup 4/P/sup tse//sub 1/2/ state. The authors argue that, for the conditions of this experiment, the 4P/sup tse//sub 1/2/ state is produced primarily by a two-step collision process: 2s-2p outer-shell excitation followed by 1s-2p inner-shell excitation.

• Research Organization: Department of Physics, The City College of the City University of New York, New York, New York 10031
• OSTI ID: 5909577
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 20:5; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
ATOMIC IONS
BEAMS
CHARGED PARTICLES
COLLISIONS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
FORBIDDEN TRANSITIONS
ION BEAMS
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
MAGNESIUM IONS
MEV RANGE
MEV RANGE 10-100
MULTICHARGED IONS
SPECTRA
X-RAY SPECTRA