Abstract
The relative abundances of metastable H*3 and D 3* molecules in collimated beams of neutralized ions are analyzed by the technique of collisional reionization (charge stripping). The fraction of metastable/dissociative species formed in the electron transfer process H3 + (D3 +)+K(g) →H*3(D*3)+K+ diminishes if the precursor ions have excess internal energy. The abundance ratio of H*3/D*3 for equivalent 6 keV beam fluxes increases sharply when the time span between neutralization and reionization is increased. The measurements show that a state of D*3 with low rotational quantum numbers (N>0) is decaying on the time scale of the beam transit with a lifetime of about 0.2 μs. Results are interpreted in reference to the predissociation behavior of the 2p 2A″2 electronic state of the radical. The disproportionate ratio of IH *3/ID*3 ≫ 1 is a consequenceof the relative abundances of precursor levels in H3 + and D 3 + that can transform into metastables by electron transfer.
| Original language | English |
|---|---|
| Pages (from-to) | 4916-4919 |
| Number of pages | 4 |
| Journal | The Journal of Chemical Physics |
| Volume | 82 |
| Issue number | 11 |
| Publication status | Published - 1985 |
| Externally published | Yes |
Fingerprint
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Physical and Theoretical Chemistry
Cite this
Isotope effects on the populations of metastable H3 and D 3 molecules in neutralized ion beams. / Jeon, Seung-Joon; Raksit, Asit B.; Gellene, Gregory I.; Porter, Richard F.
In: The Journal of Chemical Physics, Vol. 82, No. 11, 1985, p. 4916-4919.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Isotope effects on the populations of metastable H3 and D 3 molecules in neutralized ion beams
AU - Jeon, Seung-Joon
AU - Raksit, Asit B.
AU - Gellene, Gregory I.
AU - Porter, Richard F.
PY - 1985
Y1 - 1985
N2 - The relative abundances of metastable H*3 and D 3* molecules in collimated beams of neutralized ions are analyzed by the technique of collisional reionization (charge stripping). The fraction of metastable/dissociative species formed in the electron transfer process H3 + (D3 +)+K(g) →H*3(D*3)+K+ diminishes if the precursor ions have excess internal energy. The abundance ratio of H*3/D*3 for equivalent 6 keV beam fluxes increases sharply when the time span between neutralization and reionization is increased. The measurements show that a state of D*3 with low rotational quantum numbers (N>0) is decaying on the time scale of the beam transit with a lifetime of about 0.2 μs. Results are interpreted in reference to the predissociation behavior of the 2p 2A″2 electronic state of the radical. The disproportionate ratio of IH *3/ID*3 ≫ 1 is a consequenceof the relative abundances of precursor levels in H3 + and D 3 + that can transform into metastables by electron transfer.
AB - The relative abundances of metastable H*3 and D 3* molecules in collimated beams of neutralized ions are analyzed by the technique of collisional reionization (charge stripping). The fraction of metastable/dissociative species formed in the electron transfer process H3 + (D3 +)+K(g) →H*3(D*3)+K+ diminishes if the precursor ions have excess internal energy. The abundance ratio of H*3/D*3 for equivalent 6 keV beam fluxes increases sharply when the time span between neutralization and reionization is increased. The measurements show that a state of D*3 with low rotational quantum numbers (N>0) is decaying on the time scale of the beam transit with a lifetime of about 0.2 μs. Results are interpreted in reference to the predissociation behavior of the 2p 2A″2 electronic state of the radical. The disproportionate ratio of IH *3/ID*3 ≫ 1 is a consequenceof the relative abundances of precursor levels in H3 + and D 3 + that can transform into metastables by electron transfer.
UR - http://www.scopus.com/inward/record.url?scp=36549098155&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=36549098155&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:36549098155
VL - 82
SP - 4916
EP - 4919
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
SN - 0021-9606
IS - 11
ER -