Hyperfine Splitting of [Al VI] 3.66 μm and the Al Isotopic Ratio

Details Hyperfine Splitting of [Al VI] 3.66 μm and the Al Isotopic Ratio Hyperfine Splitting of [Al VI] 3.66 μm and the Al Isotopic Ratio

Nov 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aipc..804..152c&link_type=abstract

PLANETARY NEBULAE AS ASTRONOMICAL TOOLS: International Conference on Planetary Nebulae as Astronomical Tools. AIP Conference Pr

Astronomy and Astrophysics

Astronomy

Planetary Nebulae, Hyperfine Structure, Planetary Nebulae, Planetary Nebulae, Atomic Processes And Interactions, Atomic And Molecular Data, Spectra, And Spectral Parameters

Scientific paper

Spectra of [Al VI] 3.66 μm 3P2 <--3P1 in the coronal region of PN NGC 6302, obtained with Phoenix on Gemini-South at resolving powers of up to 75000, resolve the line into five hyperfine components separated by 20 to 60 km s-1 due to the coupling of the I = 5/2 nuclear spin of 27Al with the total electronic angular momentum J. 26Al has a different nuclear spin of I = 5, and a different hyperfine structure (HFS), which allows us to place a 3 σ upper limit on the 26Al/27Al ratio of 1/33. We measure the HFS magnetic-dipole coupling constants for [Al VI], and provide the first observational estimates of atomic electric-quadrupole HFS coupling constants.

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