Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 68, Number 7
Monday–Friday, June 5–9, 2023; Spokane, Washington
Session N01: Poster Session II (4:00pm-6:00pm, PT)
4:00 PM,
Wednesday, June 7, 2023
Room: Exhibit Hall C
Abstract: N01.00015 : Unusual bound state of H2+*
Presenter:
Shayamal Singh
(Purdue University)
Authors:
Shayamal Singh
(Purdue University)
Chris H Greene
(Purdue University)
The H2+ molecular ion has been studied over the years using various techniques, and in some unusual regimes it continues to display remarkable properties. One of the most dramatic predictions by Ref.[1] is the existence of a first excited state in the 2pσu potential with total orbital angular momentum, L=0. This state is extremely weakly bound, with a binding energy of 1.09 x 10-9 a.u. relative to the dissociation threshold, which correlates with a huge proton-hydrogen scattering length of about 750 Bohr radii. We explore adiabatic representations [2] to study the physics of ungerade states very close to the dissociation threshold, neglecting spin-orbit and hyperfine coupling and relativistic effects.
[1] J. Carbonell et al 2003 EPL 64 316
[2] B. D. Esry and H. R. Sadeghpour, Phys. Rev. A 60, 3604 (1999)
*This research work was funded by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, Award No. DE-SC0010545.
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