@article{112013e794354184932db751a25a590d,
title = "Threshold behavior in metastable dissociation of multi-photon ionized thymine and uracil",
abstract = "Microsecond-timescale HNCO loss has been observed from single-color multi-photon ionized pyrimidine nucleobases in the gas phase. Photon energy thresholds for the metastable channels have been measured at 5.55 ± 0.02 eV for thymine and 5.57 ± 0.02 eV for uracil. We argue that these results can be attributed to accessing the molecules{\textquoteright} S1 states with additional vibrational energy matching the threshold energy for HNCO loss from the radical cation. Combined with previous photoionization energies, this enables the S1 adiabatic energies to be deduced: 3.67 ± 0.07 eV for thymine and 3.77 ± 0.07 eV for uracil. These values are consistent with recent calculations.",
keywords = "Mass spectrometry, Metastable fragmentation, Multi-photon ionization, Pyrimidine nucleobases, Thymine, Uracil",
author = "R. Pandey and M. Ryszka and {da Fonseca Cunha}, T. and M. Lalande and M. Dampc and P. Lim{\~a}o-Vieira and Mason, {N. J.} and Poully, {J. C.} and S. Eden",
note = "sem pdf conforme despacho. British EPSRC through a Life Sciences Interface Fellowship (EP/E039618/1), a Career Acceleration Fellowship (EP/J002577/1), and a Research Grant (EP/L002191/1). The European Commission is acknowledged for a Marie Curie Intra-European Reintegration Grant (MERG-CT-2007-207292). SE and J-CP are grateful to the steering committee of the EU/ESF COST Action XLIC (CM1204) for funding a Short-Term Scientific Mission in December 2014. The CNRS is acknowledged for a PICS grant (07390) supporting the collaboration between CIMAP/GANIL and the OU. PLV acknowledges the Portuguese National Funding agency FCT-MCTES for grant UID/FIS/00068/2013. TC acknowledges FCT-MCTES for a scholarship (SFRH/BD/52538/2014). This work was also supported by the Radiation Biology and Biophysics Doctoral Training Programme (RaBBiT, PD/00193/2010); UID/Multi/ 04378/2013 (UCIBIO). ",
year = "2017",
month = jan,
day = "1",
doi = "10.1016/j.cplett.2017.06.051",
language = "English",
volume = "684",
pages = "233--238",
journal = "Chemical Physics Letters",
issn = "0009-2614",
publisher = "Elsevier Science B.V., Amsterdam.",
}