Fragment-fragment-$gamma$ triple coincident measurements of the $^{28}$Si + $^{28}$Si reaction at E$_{lab.}$ = 111.6 MeV carefully chosen to populate J = 38$^{+}$ resonance have been performed at the VIVITRON tandem facility by using Eurogam Phase II $gamma$-ray spectrometer. In the $^{28}$Si + $^{28}$Si exit-channel, the resonance behavior of the
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Fission Fragment Spectroscopy on a $^{28}$Si+$^{28}$Si Quasimolecular ResonanceNouicer, R. et al.111997
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Fitting peculiar spectral profiles in He I 10830Å absorption features
The new generation of solar instruments provides better spectral, spatial, and temporal resolution for a better understanding of the physical processes that take place on the Sun. Multiple-component profiles are more commonly observed with these instruments. Particularly, the He I 10830 Å triplet presents such peculiar spectral profiles, which give
González Manrique, S. J. et al.Fecha de publicación:
112016 -
FliPer: A global measure of power density to estimate surface gravities of main-sequence solar-like stars and red giants
Asteroseismology provides global stellar parameters such as masses, radii, or surface gravities using mean global seismic parameters and effective temperature for thousands of low-mass stars (0.8 M⊙ < M < 3 M⊙). This methodology has been successfully applied to stars in which acoustic modes excited by turbulent convection are measured. Other
Bugnet, L. et al.Fecha de publicación:
112018 -
Flow and magnetic field properties in the trailing sunspots of active region NOAA 12396
Improved measurements of the photospheric and chromospheric three-dimensional magnetic and flow fields are crucial for a precise determination of the origin and evolution of active regions. We present an illustrative sample of multi-instrument data acquired during a two-week coordinated observing campaign in August 2015 involving, among others, the
Verma, M. et al.Fecha de publicación:
112016 -
Formation of Fullerenes in H-containing Planetary Nebulae
Hydrogen depleted environments are considered an essential requirement for the formation of fullerenes. The recent detection of C60 and C70 fullerenes in what was interpreted as the hydrogen-poor inner region of a post-final helium shell flash planetary nebula (PN) seemed to confirm this picture. Here, we present strong evidence that challenges the
García-Hernández, D. A. et al.Fecha de publicación:
112010 -
Formation of lithium lines in very cool dwarfs.
We present LTE and NLTE results on the formation of LiI lines (λ6103, λ6708, and λ8126) in the atmospheres of solar metallicity dwarfs with effective temperatures in the range 5500K to 2000K. NLTE effects are governed by overionization of Li and by the interlocking effects of energy levels. For stars with T_eff_>=4000K, we confirm previous findings
Pavlenko, Y. V. et al.Fecha de publicación:
111995