کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5395819 | 1505734 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
New insight into dissociative photoionization of N2O at â¼20Â eV using threshold photoelectron-photoion coincidence velocity imaging
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: New insight into dissociative photoionization of N2O at â¼20Â eV using threshold photoelectron-photoion coincidence velocity imaging New insight into dissociative photoionization of N2O at â¼20Â eV using threshold photoelectron-photoion coincidence velocity imaging](/preview/png/5395819.png)
چکیده انگلیسی
Dissociative photoionization (DPI) of N2O at â¼20 eV has been reinvestigated with threshold photoelectron-photoion coincidence (TPEPICO) velocity imaging. In threshold photoelectron spectrum, a shoulder peak at 20.045 eV is observed close to the ground vibrational level of C2Σ+ state at 20.100 eV. Through comparing the coincident mass spectra recorded at 20.045 and 20.100 eV, the assignment of the shoulder band is corrected to a vibrational excited D2Î ionic state from the previous conclusions of the vibrationless level of b4Î or hot band of C2Σ+ state. For the dominant photofragment of NO+ at 20.045 eV, TPEPICO time-sliced velocity image is measured to obtain the corresponding total kinetic energy and angular distributions. Interestingly, both the bimodal vibrational population and angular distribution of NO+ fragment from dissociation of N2O+(D2Î ) are very similar to those of N2O+(C2Σ+) ions. With the aid of potential energy curves, the DPI mechanisms of N2O via D2Î ionic state at 20.045 eV along the NO+(X1Σ+) + N(2D) and NO+(X1Σ+) + N(2P) dissociation channels are clarified, in which the internal conversion from D2Î to B2Î state is the rate-determined step.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 196, October 2014, Pages 43-48
Journal: Journal of Electron Spectroscopy and Related Phenomena - Volume 196, October 2014, Pages 43-48
نویسندگان
Xiaofeng Tang, Xiaoguo Zhou, Binglin Qiu, Shilin Liu, Fuyi Liu, Xiaobin Shan, Liusi Sheng,