منابع مشابه
Bound anionic states of adenine.
Anionic states of nucleic acid bases are involved in DNA damage by low-energy electrons and in charge transfer through DNA. Previous gas phase studies of free, unsolvated nucleic acid base parent anions probed only dipole-bound states, which are not present in condensed phase environments, but did not observe valence anionic states, which for purine bases are thought to be adiabatically unbound...
متن کاملEnergies of Dipole-Bound Anionic States
Ž . Dipole-bound anionic states of CH CN, C H , and HF were studied using highly 3 3 2 2 correlated electronic structure methods and extended one-electron basis sets. The electron detachment energies were calculated using the coupled cluster method with single, double, and noniterative triple excitations. Geometrical relaxation of the molecular framework upon electron attachment and the differe...
متن کاملContribution of electron correlation to the stability of dipole-bound anionic states.
It has long been assumed that electron correlation effects are relatively unimportant for describing dipolebound anionic states. It is shown here that this assumption is incorrect: high-level electronic structure calculations on the dipole-bound anion states of CH3CN, C3H2, and C5H2 reveal that for these species a large fraction of the electron binding energy derives from the dispersion-type in...
متن کاملBound states and the Bekenstein bound
We explore the validity of the generalized Bekenstein bound, S ≤ πMa. We define the entropy S as the logarithm of the number of states which have energy eigenvalue below M and are localized to a flat space region of width a. If boundary conditions that localize field modes are imposed by fiat, then the bound encounters wellknown difficulties with negative Casimir energy and large species number...
متن کاملRelativistic Bound States
In this contribution, I will give a brief survey of present techniques to treat the bound state problem in relativistic quantum field theories. In particular, I will discuss the Bethe–Salpeter equation, various quasi–potential equations, the Feynman–Schwinger representation, and similarity transformation methods for Hamiltonian approaches in light–front quantization. Finally, I will comment on ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2007
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.0609982104