Stability and Cooling of the C_{7}^{2-} Dianion

P. K. Najeeb; M. H. Stockett; E. K. Anderson; M. K. Kristiansson; P. Reinhed; A. Simonsson; S. Rosén; R. D. Thomas; K. C. Chartkunchand; H. Gnaser; R. Golser; D. Hanstorp; Å. Larson; H. Cederquist; H. T. Schmidt; H. Zettergren

doi:10.1103/PhysRevLett.131.113003

Stability and Cooling of the C_{7}^{2-} Dianion

P. K. Najeeb, M. H. Stockett, E. K. Anderson, M. K. Kristiansson, P. Reinhed, A. Simonsson, S. Rosén, R. D. Thomas, K. C. Chartkunchand, H. Gnaser, R. Golser, D. Hanstorp, Å. Larson, H. Cederquist, H. T. Schmidt, H. Zettergren (Corresponding author)

Isotope Physics

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Abstract

We have studied the stability of the smallest long-lived all carbon molecular dianion (C72-) in new time domains and with a single ion at a time using a cryogenic electrostatic ion-beam storage ring. We observe spontaneous electron emission from internally excited dianions on millisecond timescales and monitor the survival of single colder C72- molecules on much longer timescales. We find that their intrinsic lifetime exceeds several minutes - 6 orders of magnitude longer than established from earlier experiments on C72-. This is consistent with our calculations of vertical electron detachment energies predicting one inherently stable isomer and one isomer which is stable or effectively stable behind a large Coulomb barrier for C72-→C7-+e- separation.

Original language	English
Article number	113003
Number of pages	6
Journal	Physical Review Letters
Volume	131
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevLett.131.113003
Publication status	Published - 15 Sep 2023

Austrian Fields of Science 2012

103013 Ion physics

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Najeeb, P. K., Stockett, M. H., Anderson, E. K., Kristiansson, M. K., Reinhed, P., Simonsson, A., Rosén, S., Thomas, R. D., Chartkunchand, K. C., Gnaser, H., Golser, R., Hanstorp, D., Larson, Å., Cederquist, H., Schmidt, H. T., & Zettergren, H. (2023). Stability and Cooling of the C_{7}^{2-} Dianion. Physical Review Letters, 131(11), [113003]. https://doi.org/10.1103/PhysRevLett.131.113003

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abstract = "We have studied the stability of the smallest long-lived all carbon molecular dianion (C72-) in new time domains and with a single ion at a time using a cryogenic electrostatic ion-beam storage ring. We observe spontaneous electron emission from internally excited dianions on millisecond timescales and monitor the survival of single colder C72- molecules on much longer timescales. We find that their intrinsic lifetime exceeds several minutes - 6 orders of magnitude longer than established from earlier experiments on C72-. This is consistent with our calculations of vertical electron detachment energies predicting one inherently stable isomer and one isomer which is stable or effectively stable behind a large Coulomb barrier for C72-→C7-+e- separation.",

author = "Najeeb, {P. K.} and Stockett, {M. H.} and Anderson, {E. K.} and Kristiansson, {M. K.} and P. Reinhed and A. Simonsson and S. Ros{\'e}n and Thomas, {R. D.} and Chartkunchand, {K. C.} and H. Gnaser and R. Golser and D. Hanstorp and {\AA}. Larson and H. Cederquist and Schmidt, {H. T.} and H. Zettergren",

note = "Publisher Copyright: {\textcopyright} 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the {"}https://creativecommons.org/licenses/by/4.0/{"}Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by {"}https://www.kb.se/samverkan-och-utveckling/oppen-tillgang-och-bibsamkonsortiet/bibsamkonsortiet.html{"}Bibsam.",

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Najeeb, PK, Stockett, MH, Anderson, EK, Kristiansson, MK, Reinhed, P, Simonsson, A, Rosén, S, Thomas, RD, Chartkunchand, KC, Gnaser, H, Golser, R, Hanstorp, D, Larson, Å, Cederquist, H, Schmidt, HT & Zettergren, H 2023, 'Stability and Cooling of the C_{7}^{2-} Dianion', Physical Review Letters, vol. 131, no. 11, 113003. https://doi.org/10.1103/PhysRevLett.131.113003

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AU - Anderson, E. K.

AU - Kristiansson, M. K.

AU - Reinhed, P.

AU - Simonsson, A.

AU - Rosén, S.

AU - Thomas, R. D.

AU - Chartkunchand, K. C.

AU - Gnaser, H.

AU - Golser, R.

AU - Hanstorp, D.

AU - Larson, Å.

AU - Cederquist, H.

AU - Schmidt, H. T.

AU - Zettergren, H.

N1 - Publisher Copyright: © 2023 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the "https://creativecommons.org/licenses/by/4.0/"Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by "https://www.kb.se/samverkan-och-utveckling/oppen-tillgang-och-bibsamkonsortiet/bibsamkonsortiet.html"Bibsam.

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N2 - We have studied the stability of the smallest long-lived all carbon molecular dianion (C72-) in new time domains and with a single ion at a time using a cryogenic electrostatic ion-beam storage ring. We observe spontaneous electron emission from internally excited dianions on millisecond timescales and monitor the survival of single colder C72- molecules on much longer timescales. We find that their intrinsic lifetime exceeds several minutes - 6 orders of magnitude longer than established from earlier experiments on C72-. This is consistent with our calculations of vertical electron detachment energies predicting one inherently stable isomer and one isomer which is stable or effectively stable behind a large Coulomb barrier for C72-→C7-+e- separation.

AB - We have studied the stability of the smallest long-lived all carbon molecular dianion (C72-) in new time domains and with a single ion at a time using a cryogenic electrostatic ion-beam storage ring. We observe spontaneous electron emission from internally excited dianions on millisecond timescales and monitor the survival of single colder C72- molecules on much longer timescales. We find that their intrinsic lifetime exceeds several minutes - 6 orders of magnitude longer than established from earlier experiments on C72-. This is consistent with our calculations of vertical electron detachment energies predicting one inherently stable isomer and one isomer which is stable or effectively stable behind a large Coulomb barrier for C72-→C7-+e- separation.

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JF - Physical Review Letters

SN - 0031-9007

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ER -

Stability and Cooling of the C_{7}^{2-} Dianion

Abstract

Austrian Fields of Science 2012

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