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MAGNETIC TRAPPING OF $^3\Sigma$ MOLECULES AND TIME-DOMAIN MEASUREMENT OF VIBRATIONAL LIFETIMES

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/33238

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Title: MAGNETIC TRAPPING OF $^3\Sigma$ MOLECULES AND TIME-DOMAIN MEASUREMENT OF VIBRATIONAL LIFETIMES
Creators: Campbell, Wesley C.; Hummon, Matthew T.; Lu, Hsin-I; Buuren, Laurens D. Van; Tsikata, Edem; Doyle, John M.
Issue Date: 2008
Abstract: NH molecular radicals are magnetically trapped using helium buffer-gas loading at $\sim$600 mK. The helium collision Zeeman relaxation and energy transport cross sections are measured, and the ratio of these cross sections is $\sigma_{\mathrm{d}}/\sigma_{\mathrm{in}} = 7 \times 10^4$, sufficient for trap lifetimes of order 1 s. The scaling of the helium-induced Zeeman relaxation of $^3\Sigma$ molecules is investigated by changing the radical rotational constant through isotopic substitution. We also measure the spontaneous emission lifetime of NH($X$, $v=1$), providing a precision measurement of this transition strength for the astrophysical community.
URI: http://hdl.handle.net/1811/33238
Other Identifiers: 2008-TF-12
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