Measurements of C3H+3, C5H+3, C6H+6, C7H+5, and C10H+8 dissociative recombination rate coefficients

1993 ◽  
Vol 99 (1) ◽  
pp. 237-243 ◽  
Author(s):  
H. Abouelaziz ◽  
J. C. Gomet ◽  
D. Pasquerault ◽  
B. R. Rowe ◽  
J. B. A. Mitchell
Keyword(s):  
Recombination Rate ◽  
Dissociative Recombination ◽  
Rate Coefficients

The dissociative recombination rate coefficients of H+3, HN+2, and HCO+

1990 ◽  
Vol 92 (11) ◽  
pp. 6492-6501 ◽  
Author(s):  
T. Amano
Keyword(s):  
Recombination Rate ◽  
Dissociative Recombination ◽  
Rate Coefficients

On the effective recombination coefficient in Saturn's ionosphere

2020 ◽  
Author(s):  
Joshua Dreyer ◽  
Erik Vigren ◽  
Michiko Morooka ◽  
Jan-Erik Wahlund ◽  
Stephan Buchert ◽  
...  
Keyword(s):  
Electron Temperature ◽  
Rate Constants ◽  
Recombination Rate ◽  
Negative Ions ◽  
Dissociative Recombination ◽  
Rate Coefficients ◽  
Recombination Coefficient ◽  
Positive Ions ◽  
Electron Production ◽  
Upper Limits

<p>The present study combines RPWS/LP and INMS data from Cassini's orbit 292, which reached an altitude of 1685 km at the lowest point, to constrain the effective recombination coefficient α<sub>300</sub> from measured densities and electron temperatures at a reference electron temperature of 300 K. Assuming photochemical equilibrium at these low altitudes and linking established methods to calculate the electron production rate and the dissociative recombination rate results in a formula to calculate an upper limit for α<sub>300</sub>. This is then compared against rate constants of individual recombination reactions as measured in the laboratory.<br>We derive upper limits for α<sub>300</sub> of ∼ 2.5∗10<sup>-7</sup>cm<sup>3 </sup>s<sup>-1</sup>, which suggest that Saturn's ionospheric positive ions are dominated by species with low recombination rate coefficients. An ionosphere dominated by water group ions or complex hydrocarbons, as previously suggested, is incompatible with this result, as these species have recombination rate constants > 5∗10<sup>-7 </sup>cm<sup>3 </sup>s<sup>-1</sup> at an electron temperature of 300 K. The results do not give constraints on the nature of the negative ions.</p>

scholarly journals High resolution low-energy dielectronic recombination rate coefficients of beryllium-like germanium: QED test bench for two-valence-electron systems

2009 ◽  
Vol 163 ◽  
pp. 012058 ◽  
Author(s):  
D A Orlov ◽  
C Krantz ◽  
D Bernhardt ◽  
C Brandau ◽  
J Hoffmann ◽  
...  
Keyword(s):  
High Resolution ◽  
Recombination Rate ◽  
Valence Electron ◽  
Test Bench ◽  
Dielectronic Recombination ◽  
Low Energy ◽  
Rate Coefficients ◽  
Electron Systems

Dissociative recombination of the methane family ions: rate coefficients and implications

2004 ◽  
Vol 33 (2) ◽  
pp. 216-220 ◽  
Author(s):  
C.H. Sheehan ◽  
J.-P. St.-Maurice
Keyword(s):  
Dissociative Recombination ◽  
Rate Coefficients

Dielectronic recombination rate coefficients for the CoI isoelectronic sequence

2009 ◽  
Vol 42 (10) ◽  
pp. 105203 ◽  
Author(s):  
Fan-Chang Meng ◽  
Li Zhou ◽  
Min Huang ◽  
Chong-Yang Chen ◽  
Yan-Sen Wang ◽  
...  
Keyword(s):  
Recombination Rate ◽  
Dielectronic Recombination ◽  
Rate Coefficients ◽  
Isoelectronic Sequence

Theoretical dielectronic recombination rate coefficients for ground-state hydrogen-like neon

1986 ◽  
Vol 116 (4) ◽  
pp. 172-174 ◽  
Author(s):  
K.R. Karim ◽  
C.P. Bhalla
Keyword(s):  
Ground State ◽  
Recombination Rate ◽  
Dielectronic Recombination ◽  
Rate Coefficients

Further measurements of the H+3(v=0,1,2) dissociative recombination rate coefficient

1992 ◽  
Vol 97 (2) ◽  
pp. 1028-1037 ◽  
Author(s):  
A. Canosa ◽  
J. C. Gomet ◽  
B. R. Rowe ◽  
J. B. A. Mitchell ◽  
J. L. Queffelec
Keyword(s):  
Recombination Rate ◽  
Rate Coefficient ◽  
Dissociative Recombination ◽  
Recombination Rate Coefficient

scholarly journals Experimental N V and Ne VIII low-temperature dielectronic recombination rate coefficients

2005 ◽  
Vol 437 (3) ◽  
pp. 1151-1157 ◽  
Author(s):  
S. Böhm ◽  
A. Müller ◽  
S. Schippers ◽  
W. Shi ◽  
M. Fogle ◽  
...  
Keyword(s):  
Low Temperature ◽  
Recombination Rate ◽  
Dielectronic Recombination ◽  
Rate Coefficients

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.

Sign in / Sign up

Export Citation Format

Share Document