vibrational state
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2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yao Chang ◽  
Feng An ◽  
Zhichao Chen ◽  
Zijie Luo ◽  
Yarui Zhao ◽  
...  

AbstractVibrationally excited molecular hydrogen has been commonly observed in the dense photo-dominated regions (PDRs). It plays an important role in understanding the chemical evolution in the interstellar medium. Until recently, it was widely accepted that vibrational excitation of interstellar H2 was achieved by shock wave or far-ultraviolet fluorescence pumping. Here we show a further pathway to produce vibrationally excited H2 via the water photochemistry. The results indicate that the H2 fragments identified in the O(1S) + H2(X1Σg+) channel following vacuum ultraviolet (VUV) photodissociation of H2O in the wavelength range of λ = ~100-112 nm are vibrationally excited. In particular, more than 90% of H2(X) fragments populate in a vibrational state v = 3 at λ~112.81 nm. The abundance of water and VUV photons in the interstellar space suggests that the contributions of these vibrationally excited H2 from the water photochemistry could be significant and should be recognized in appropriate interstellar chemistry models.



2021 ◽  
pp. 100049
Author(s):  
Ardhendu Pal ◽  
Biswajit Panda ◽  
Sanchi Maithani ◽  
Manik Pradhan
Keyword(s):  


2021 ◽  
Vol 103 (3) ◽  
Author(s):  
Anna Zakharova ◽  
Alexander Petrov


2021 ◽  
Vol 161 (3) ◽  
pp. 111
Author(s):  
V. Dike ◽  
M. R. Morris ◽  
R. M. Rich ◽  
M. O. Lewis ◽  
L. H. Quiroga-Nuñez ◽  
...  




Author(s):  
D.P. ALEYNIKOV ◽  
◽  
A.V. LUKYANOV ◽  
P.N. KOSTIN ◽  
◽  
...  


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