Radiative decay probabilities of the (2s{sup 2}2p{sub 1/2}{sup 5}3s{sub 1/2}){sub J=0} level in neonlike ions

Journal Article · Sat Jan 15 00:00:00 EST 2011 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.83.012514· OSTI ID:21529073

Beiersdorfer, P ^[1]; Obst, M ^[2]; Safronova, U I ^[3]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
2. Space Sciences Laboratory, University of California, Berkeley, California 94720 (United States)
3. Physics Department, University of Nevada, Reno, Nevada 89557 (United States)

The radiative decay rates of the (2s{sup 2}2p{sub 1/2}{sup 5}3s{sub 1/2}){sub J=0} level in neonlike ions have been calculated for nuclear charges ranging from Z=10 to Z=110. The calculations include the magnetic dipole decay to the (2s{sup 2}2p{sub 3/2}{sup 5}3s{sub 1/2}){sub J=1} level, which is shown to be the dominant decay branch in low-Z and very-high-Z ions, as well as the two-electron, one-photon decays to the (2s{sup 2}2p{sub 3/2}{sup 5}3p{sub 1/2}){sub J=1} and (2s{sup 2}2p{sub 3/2}{sup 5}3p{sub 3/2}){sub J=1} levels, which dominate near Z=50. We also take into account a small magnetic quadrupole decay branch to the (2s{sup 2}2p{sub 3/2}{sup 5}3s{sub 1/2}){sub J=2} level and calculate the total radiative lifetime of the (2s{sup 2}2p{sub 1/2}{sup 5}3s{sub 1/2}){sub J=0} level. The resulting values span over 15 orders of magnitude, and much of this range is accessible with modern atomic lifetime measurement techniques. In particular, we calculate a value of 1.6x10{sup 4} s{sup -1} for the radiative decay rate of the (2s{sup 2}2p{sub 1/2}{sup 5}3s{sub 1/2}){sub J=0} level in Fe XVII and show that the corresponding magnetic dipole transition has a measurable spectral intensity for electron densities below about 1x10{sup 13} cm{sup -3}.

• OSTI ID: 21529073
• Journal Information: Physical Review. A, Vol. 83, Issue 1; Other Information: DOI: 10.1103/PhysRevA.83.012514; (c) 2011 American Institute of Physics; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ATOMIC NUMBER
ELECTRON DENSITY
ELECTRONS
LIFETIME
M1-TRANSITIONS
MAGNETIC DIPOLES
PHOTONS
PROBABILITY
RADIATIVE DECAY
BOSONS
DECAY
DIPOLES
ELEMENTARY PARTICLES
ENERGY-LEVEL TRANSITIONS
FERMIONS
LEPTONS
MASSLESS PARTICLES
MULTIPOLE TRANSITIONS
MULTIPOLES
PARTICLE DECAY