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# MILLIMETER AND SUBMILLIMETER SPECTROSCOPY OF THE UNSTABLE SPECIES $NH_{2}$ AND NaH/NaD $^{*}$

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/11737

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 Title: MILLIMETER AND SUBMILLIMETER SPECTROSCOPY OF THE UNSTABLE SPECIES $NH_{2}$ AND NaH/NaD $^{*}$ Creators: Charo, Arthur A.; Sastry, K. V. L. N.; Herbst, E.; De Lucia, Frank C. Issue Date: 1981 Abstract: We have detected and measured the fine and hyperfine structure of both the 3$_{13}-2_{20}$ and $1_{10}-1_{01}$ transitions of $NH_{2}$ in a millimeter and sub-millimeter microwave absorption experiment. These electric dipole transitions are excellent candidates for the astrophysical detection of $NH_{2}$. In this experiment $NH_{2}$ was produced by the reaction of the products of a microwave discharge of $H_{2}O$ or $H_{2}$ with hydrazine. We have also studied the J=0$\rightarrow 1$ transition of NaH and the J =$1\rightarrow2$ and J=$2\rightarrow3$ transitions of NaD. A number of excited vibrational states of these species have also been observed. The species NaH and NaD should be observable in dense interstellar clouds. NaH and NaD were observed in the positive column of a glow discharge of a mixture of hydrogen and sodium vapor. Under these conditions we found the excited states to be vibrationally hot and the lifetime of sodium hydride to be less than one $millisecond.^{*}$Work supported by ARO Contract \#DAAG-29-80-C-0026 and NSF Grant \#-8020321 $^{**}$On sabbatical leave from the University of New Brunswick. URI: http://hdl.handle.net/1811/11737 Other Identifiers: 1981-WF-3