  Valuable theoretical predictions of nuclear dipole excitations in the whole
nuclear chart are of great interest for different applications, including in
particular nuclear astrophysics. We present here the systematic study of the
electric dipole (E1) photon strength functions (PSFs) combining the microscopic
Hartree-Fock-Bogoliubov plus Quasiparticle Random Phase Approximation
(HFB+QRPA) model and the parametrizations constrained by the available
experimental giant dipole resonance (GDR) data. For about 10000 nuclei with
8<Z<124 lying between the proton and the neutron drip-lines on nuclear chart,
the particle-hole strength distributions are computed using the HFB+QRPA model
under the assumption of spherical symmetry and making use of the BSk27 Skyrme
effective interaction derived from the most accurate HFB mass model (HFB-27) so
far achieved. Large-scale calculations of the BSk27+QRPA E1 PSFs are performed
in the framework of a specific folding procedure, in which three
phenomenological improvements are considered. First, two interference factors
are introduced and adjusted to reproduce at best the available experimental GDR
data. Second, an empirical expression accounting for the deformation effect is
applied to describe the peak splitting of the strength function. Third, the
width of the strength function is corrected by a temperature-dependent term,
which effectively increases the de-excitation photon strength function at
low-energy. The E1 PSFs as well as the extracted GDR peaks and widths are
compared with available experimental data. A relatively good agreement with
data indicates the reliability of the calculations. Eventually, the
astrophysical (n,g) rates for all the 10000 nuclei with 8<Z<124 are estimated
using the present E1 PSFs. The resulting reaction rates are compared with
previous BSk7+QRPA results and Gogny-HFB+QRPA predictions based on the D1M
interaction.
