Jian-yang Zhang, Kai-jun Yuan, Yuan Chen, Steven A. Harich, Xiu-yan Wang, Xue-ming Yang, Alec M. Wodtke. UV Photodissociation Dynamics of HN3 in 190-248 nm[J]. Chinese Journal of Chemical Physics , 2007, 20(4): 345-351. doi: 10.1088/1674-0068/20/04/345-351
Citation: Jian-yang Zhang, Kai-jun Yuan, Yuan Chen, Steven A. Harich, Xiu-yan Wang, Xue-ming Yang, Alec M. Wodtke. UV Photodissociation Dynamics of HN3 in 190-248 nm[J]. Chinese Journal of Chemical Physics , 2007, 20(4): 345-351. doi: 10.1088/1674-0068/20/04/345-351

UV Photodissociation Dynamics of HN3 in 190-248 nm

doi: 10.1088/1674-0068/20/04/345-351
Funds:  This work was supported by Chinese Academy of Sci-ences via the grant of the CAS international collabora-tion group, and also partly by the Ministry of Scienceand Technology of China and the National Natural Sci-ence Foundation of China.
  • Received Date: 2007-07-09
  • Rev Recd Date: 2007-08-02
  • The H+N3 channel in the ultraviolet photodissociation of HN3 has been investigated from 190 nm to 248 nm using the high-n Rydberg H-atom time-of-°ight technique. Product translational energy distributions as well as product angular anisotropy parameters were determined for the H+N3 channel at di?erent photolysis wavelengths. N3 vibrational state distribution has also been derived from the product translational energy distribution at these wavelengths. Above photolysis wavelength 225 nm, HN3 predominantly dissociatethrough the repulsive state. Below 225 nm, a new slow channel starts to appear at 220 nm in addition to the existing channel. This channel is attributed to a ring closure dissociation channel to produce the cyclic N3 product. As photolysis energy increases, this new channel becomes more important.
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UV Photodissociation Dynamics of HN3 in 190-248 nm

doi: 10.1088/1674-0068/20/04/345-351
Funds:  This work was supported by Chinese Academy of Sci-ences via the grant of the CAS international collabora-tion group, and also partly by the Ministry of Scienceand Technology of China and the National Natural Sci-ence Foundation of China.

Abstract: The H+N3 channel in the ultraviolet photodissociation of HN3 has been investigated from 190 nm to 248 nm using the high-n Rydberg H-atom time-of-°ight technique. Product translational energy distributions as well as product angular anisotropy parameters were determined for the H+N3 channel at di?erent photolysis wavelengths. N3 vibrational state distribution has also been derived from the product translational energy distribution at these wavelengths. Above photolysis wavelength 225 nm, HN3 predominantly dissociatethrough the repulsive state. Below 225 nm, a new slow channel starts to appear at 220 nm in addition to the existing channel. This channel is attributed to a ring closure dissociation channel to produce the cyclic N3 product. As photolysis energy increases, this new channel becomes more important.

Jian-yang Zhang, Kai-jun Yuan, Yuan Chen, Steven A. Harich, Xiu-yan Wang, Xue-ming Yang, Alec M. Wodtke. UV Photodissociation Dynamics of HN3 in 190-248 nm[J]. Chinese Journal of Chemical Physics , 2007, 20(4): 345-351. doi: 10.1088/1674-0068/20/04/345-351
Citation: Jian-yang Zhang, Kai-jun Yuan, Yuan Chen, Steven A. Harich, Xiu-yan Wang, Xue-ming Yang, Alec M. Wodtke. UV Photodissociation Dynamics of HN3 in 190-248 nm[J]. Chinese Journal of Chemical Physics , 2007, 20(4): 345-351. doi: 10.1088/1674-0068/20/04/345-351

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