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Crepin C Broquier M Dubost H Galaup JP Le Gouet JL Ortega JM 《Physical review letters》2000,85(5):964-967
Infrared picosecond accumulated photon echo experiments have been performed for the first time, using the Orsay Free Electron Laser, on the v = 0-->v = 1 transition of CO in solid nitrogen. The vibrational dephasing time is found to be exceptionally long ( T2>/=120 ns) at low temperature. The analysis of the observed spectral diffusion leads one to assume different energy transfer mechanisms depending on the CO concentration. 相似文献
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V. Dexheimer G. Pagliara L. Tolós J. Schaffner-Bielich S. Schramm 《The European Physical Journal A - Hadrons and Nuclei》2008,38(1):105-113
The equation of state of beta-stable and charge neutral nucleonic matter is computed within theSU(2) parity doublet model in mean-field and in the relativistic Hartree approximation. The mass of the chiral partner of the
nucleon is assumed to be 1200MeV. The transition to the chiral restored phase turns out to be a smooth crossover in all the
cases considered, taking place at a baryon density of just 2ρ0 . The mass-radius relations of compact stars are calculated to constrain the model parameters from the maximum mass limit
of neutron stars. It is demonstrated that chiral symmetry starts to be restored, which in this model implies the appearance
of the chiral partners of the nucleons, in the center of neutron stars. However, the analysis of the decay width of the assumed
chiral partner of the nucleon poses limits on the validity of the present version of the model to describe vacuum properties. 相似文献