Ground State of the Helium‐Hydride Ion

1956 ◽  
Vol 24 (1) ◽  
pp. 150-152 ◽  
Author(s):  
Arthur A. Evett
Keyword(s):  
Ground State ◽  
Hydride Ion ◽  
Helium Hydride

Ground State of the Helium Hydride Ion

1955 ◽  
Vol 23 (6) ◽  
pp. 1169-1170 ◽  
Author(s):  
Arthur A. Evett
Keyword(s):  
Ground State ◽  
Hydride Ion ◽  
Helium Hydride

scholarly journals Quantum-state–selective electron recombination studies suggest enhanced abundance of primordial HeH+

Science ◽  
2019 ◽  
Vol 365 (6454) ◽  
pp. 676-679 ◽  
Author(s):  
Oldřich Novotný ◽  
Patrick Wilhelm ◽  
Daniel Paul ◽  
Ábel Kálosi ◽  
Sunny Saurabh ◽  
...  
Keyword(s):  
Galaxy Formation ◽  
Dissociative Recombination ◽  
Molecular Ions ◽  
Rate Coefficients ◽  
Specific Rate ◽  
Electron Recombination ◽  
Recombination Rates ◽  
Rotational States ◽  
Hydride Ion ◽  
Helium Hydride

The epoch of first star formation in the early Universe was dominated by simple atomic and molecular species consisting mainly of two elements: hydrogen and helium. Gaining insight into this constitutive era requires a thorough understanding of molecular reactivity under primordial conditions. We used a cryogenic ion storage ring combined with a merged electron beam to measure state-specific rate coefficients of dissociative recombination, a process by which electrons destroy molecular ions. We found a pronounced decrease of the electron recombination rates for the lowest rotational states of the helium hydride ion (HeH+), compared with previous measurements at room temperature. The reduced destruction of cold HeH+ translates into an enhanced abundance of this primordial molecule at redshifts of first star and galaxy formation.

scholarly journals Astrophysical detection of the helium hydride ion HeH+

Nature ◽  
2019 ◽  
Vol 568 (7752) ◽  
pp. 357-359 ◽  
Author(s):  
Rolf Güsten ◽  
Helmut Wiesemeyer ◽  
David Neufeld ◽  
Karl M. Menten ◽  
Urs U. Graf ◽  
...  
Keyword(s):  
Hydride Ion ◽  
Helium Hydride

Rovibrational levels of helium hydride ion

2012 ◽  
Vol 137 (20) ◽  
pp. 204314 ◽  
Author(s):  
Krzysztof Pachucki ◽  
Jacek Komasa
Keyword(s):  
Hydride Ion ◽  
Helium Hydride

Helium Hydride Ion

1933 ◽  
Vol 1 (12) ◽  
pp. 886-887 ◽  
Author(s):  
George Glockler ◽  
D. L. Fuller
Keyword(s):  
Hydride Ion ◽  
Helium Hydride

scholarly journals Detection of Vibrational Emissions from the Helium Hydride Ion (HeH+) in the Planetary Nebula NGC 7027

2020 ◽  
Vol 894 (1) ◽  
pp. 37 ◽  
Author(s):  
David A. Neufeld ◽  
Miwa Goto ◽  
T. R. Geballe ◽  
Rolf Güsten ◽  
Karl M. Menten ◽  
...  
Keyword(s):  
Planetary Nebula ◽  
Hydride Ion ◽  
Ngc 7027 ◽  
Helium Hydride

Renilla Bioluminescence: A Morphologic Approach to the Location of Photocytes

1974 ◽  
Vol 32 ◽  
pp. 208-209
Author(s):  
Ben O. Spurlock ◽  
Milton J. Cormier
Keyword(s):  
Excited State ◽  
Ground State ◽  
Molecular Basis ◽  
Light Emission ◽  
Chemical Basis ◽  
Electronic Excited State ◽  
Colonial Form ◽  
The Common ◽  
Eighteenth And Nineteenth Centuries ◽  
Catalyzed Oxidation

The phenomenon of bioluminescence has fascinated layman and scientist alike for many centuries. During the eighteenth and nineteenth centuries a number of observations were reported on the physiology of bioluminescence in Renilla, the common sea pansy. More recently biochemists have directed their attention to the molecular basis of luminosity in this colonial form. These studies have centered primarily on defining the chemical basis for bioluminescence and its control. It is now established that bioluminescence in Renilla arises due to the luciferase-catalyzed oxidation of luciferin. This results in the creation of a product (oxyluciferin) in an electronic excited state. The transition of oxyluciferin from its excited state to the ground state leads to light emission.

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