Publication Type |
Journal Article |
School or College |
College of Science |
Department |
Chemistry |
Creator |
Morse, Michael David |
Other Author |
Linton, Colan; Simard, Benoit; Loock, Peter; Wallin, Sara; Rothschopf, Gretchen K.; Gunion, Robert F.; Armentrout, Peter B. |
Title |
Rydberg and pulsed field ionization-zero electron kinetic energy spectra of YO |
Date |
1999 |
Description |
A spectroscopic study of the Rydberg states of YO accessed from particular rotational levels of the A 2II1/2, v=0 state has been combined with a pulsed field ionization, zero electron kinetic energy (PFI-ZEKE) investigation. The results provide accurate values of the ionization energy of YO, ionization energy I.E.(YO)=49 304.316(31) cm-1 [6.112 958](4) eV], and of the rotational constant (and bond length) of the YO+ cation in its X 1?+, v=0 ground state, B0+=0.4078(3) cm21 [r0=1.7463(6) ?]. The improved value of I.E.(YO) combined with the known ionization energy of atomic yttrium then leads to the result D0 0 (Y+-O)2D0 0 (Y2O=0.1041?0.0001 eV. Combining this result with the value of D0 0 (Y+-O) obtained from guided ion beam mass spectrometry yields an improved value of D0 0 (Y+O)=7.14?0.18 eV. The PFI-ZEKE spectra display an interesting channel-coupling effect so that all rotational levels with J+?J'(A)+0.5 are observed with high intensity, where J+ is the angular momentum of the YO+ cation that is produced and J'(A) is the angular momentum of the A 2II1/2 state that is reached when the first photon is absorbed. This is thought to result from the interaction between the dipole moment of the rotating YO+ core and the Rydberg electron, which can induce changes in l and J+ subject to the dipolar coupling matrix element selection rule, ?J+=?1, ?l=?1. The channel-coupling mechanism also appears to induce an inverse autoionization process in which an unbound electron with a low value of l is captured either by its low-J+1 YO+ cation or by a second YO+ cation with the same value of J+. This inverse autoionization process is extremely sensitive to the electron kinetic energy, leading to narrow peaks in the PFI-ZEKE spectrum which are only slightly broader than the laser linewidth employed for this study (0.25 cm-1). |
Type |
Text |
Publisher |
American Institute of Physics (AIP) |
Volume |
111 |
Issue |
11 |
First Page |
5017 |
Last Page |
5026 |
DOI |
10.1063/1.479759 |
Language |
eng |
Bibliographic Citation |
Linton, C., Simard, B., Loock, P., Wallin, S., Rothschopf, G. K., Gunion, R. F., Morse, M. D., & Armentrout, P. B. (1999). Rydberg and pulsed field ionization-zero electron kinetic energy spectra of YO. Journal of Chemical Physics, 111(11), 5017-26. |
Rights Management |
©American Institute of Physics. The following article appeared in Linton, C., Simard, B., Loock, P., Wallin, S., Rothschopf, G. K., Gunion, R. F., Morse, M. D., & Armentrout, P. B. (1999). Rydberg and pulsed field ionization-zero electron kinetic energy spectra of YO. Journal of Chemical Physics, 111(11), 5017-26. and may be found at doi:10.1063/1.479759. |
Format Medium |
application/pdf |
Format Extent |
146,804 bytes |
Identifier |
ir-main,16966 |
ARK |
ark:/87278/s6571wn4 |
Setname |
ir_uspace |
ID |
706946 |
Reference URL |
https://collections.lib.utah.edu/ark:/87278/s6571wn4 |