Vibrational cooling of H-2(+) and D-2(+) in a storage ring studied by means of two-dimensional fragment imaging - art. no. 062707

Citation
M. Saito et al., Vibrational cooling of H-2(+) and D-2(+) in a storage ring studied by means of two-dimensional fragment imaging - art. no. 062707, PHYS REV A, 6106(6), 2000, pp. 2707
Citations number
23
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW A
ISSN journal
1050-2947 → ACNP
Volume
6106
Issue
6
Year of publication
2000
Database
ISI
SICI code
1050-2947(200006)6106:6<2707:VCOHAD>2.0.ZU;2-J
Abstract
The vibrational cooling of H-2(+) and D-2(+), having no dipole moment, has been studied at the storage ring TARN II. A two-dimensional imaging techniq ue was used to measure the kinetic-energy release (KER) in the dissociative recombination of H-2(+) and D-2(+) as a function of the storage time at a relative energy of 0 eV. The vibrational-level populations of the H-2(+) an d D-2(+) beams were estimated from the KER data. The estimation shows that the relative population of H-2(+) ions in their vibrational ground states r eaches more than 90% at a storage time of 26 s. This result is in agreement with the recent result in TARN II [T. Tanabe et al., Phys. Rev. Lett. 83, 2163 (1999)]. The relative population of D-2(+) ions in their vibrational g round states is estimated to be more than 90% for a storage time of 10 s.