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Title: Photoionization and photofragmentation of the C 60 + molecular ion

Abstract

Cross-section measurements are reported for single and double photoionization of C$$+\atop{60}$$ ions in the photon energy range 18-150 eV accompanied by the loss of zero to seven pairs of carbon atoms, as well as for fragmentation without ionization resulting in loss of two to eight pairs of C atoms in the photon energy range 18-65 eV. Absolute measurements were performed by merging a beam of C$$+\atop{60}$$ molecular ions with a beam of monochromatized synchrotron radiation. Product channels involving dissociation yielding smaller fullerene fragment ions account for nearly half of the total measured oscillator strength in this energy range. The sum of cross sections for the measured product channels is compared to a published calculation of the total photoabsorption cross section of neutral C 60 based on time-dependent density-functional theory. Lastly, this comparison and an accounting of oscillator strengths indicate that with the exception of C$$+\atop{58}$$, the most important product channels resulting from photoabsorption were accounted for in the experiment. Threshold energies for the successive removal of carbon atom pairs accompanying photoionization are also determined from the measurements.

Authors:
 [1];  [1];  [1];  [1];  [2];  [1];  [3];  [4];  [5];  [1]
  1. Univ. of Nevada, Reno, NV (United States)
  2. Univ. of Nevada, Reno, NV (United States). Dept. of Physics; Justus Liebig Univ. Giessen, Giessen (Germany). Inst. fur Atom-und Molekulphysik
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  4. Justus Liebig Univ. Giessen, Giessen (Germany). Inst. fur Atom-und Molekulphysik
  5. Justus Liebig Univ. Giessen, Giessen (Germany). Inst. fur Atom-und Molekulphysik, I. Physikalisches Inst.
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); German Research Foundation (DFG)
OSTI Identifier:
1393031
DOE Contract Number:  
AC02-05CH11231; FG02-03ER15424; AC03-76SF0098; Mu 1068/10; Mu 1068/22
Resource Type:
Journal Article
Journal Name:
Physical Review A
Additional Journal Information:
Journal Volume: 93; Journal Issue: 3; Journal ID: ISSN 2469-9926
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
Photoionization

Citation Formats

Baral, K. K., Aryal, N. B., Esteves-Macaluso, D. A., Thomas, C. M., Hellhund, J., Lomsadze, R., Kilcoyne, A. L. D., Müller, A., Schippers, S., and Phaneuf, R. A. Photoionization and photofragmentation of the C60+ molecular ion. United States: N. p., 2016. Web. doi:10.1103/PhysRevA.93.033401.
Baral, K. K., Aryal, N. B., Esteves-Macaluso, D. A., Thomas, C. M., Hellhund, J., Lomsadze, R., Kilcoyne, A. L. D., Müller, A., Schippers, S., & Phaneuf, R. A. Photoionization and photofragmentation of the C60+ molecular ion. United States. doi:10.1103/PhysRevA.93.033401.
Baral, K. K., Aryal, N. B., Esteves-Macaluso, D. A., Thomas, C. M., Hellhund, J., Lomsadze, R., Kilcoyne, A. L. D., Müller, A., Schippers, S., and Phaneuf, R. A. Tue . "Photoionization and photofragmentation of the C60+ molecular ion". United States. doi:10.1103/PhysRevA.93.033401.
@article{osti_1393031,
title = {Photoionization and photofragmentation of the C60+ molecular ion},
author = {Baral, K. K. and Aryal, N. B. and Esteves-Macaluso, D. A. and Thomas, C. M. and Hellhund, J. and Lomsadze, R. and Kilcoyne, A. L. D. and Müller, A. and Schippers, S. and Phaneuf, R. A.},
abstractNote = {Cross-section measurements are reported for single and double photoionization of C$+\atop{60}$ ions in the photon energy range 18-150 eV accompanied by the loss of zero to seven pairs of carbon atoms, as well as for fragmentation without ionization resulting in loss of two to eight pairs of C atoms in the photon energy range 18-65 eV. Absolute measurements were performed by merging a beam of C$+\atop{60}$ molecular ions with a beam of monochromatized synchrotron radiation. Product channels involving dissociation yielding smaller fullerene fragment ions account for nearly half of the total measured oscillator strength in this energy range. The sum of cross sections for the measured product channels is compared to a published calculation of the total photoabsorption cross section of neutral C60 based on time-dependent density-functional theory. Lastly, this comparison and an accounting of oscillator strengths indicate that with the exception of C$+\atop{58}$, the most important product channels resulting from photoabsorption were accounted for in the experiment. Threshold energies for the successive removal of carbon atom pairs accompanying photoionization are also determined from the measurements.},
doi = {10.1103/PhysRevA.93.033401},
journal = {Physical Review A},
issn = {2469-9926},
number = 3,
volume = 93,
place = {United States},
year = {2016},
month = {3}
}

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