  Elemental abundances can be determined from stellar spectra, making it
possible to study galactic formation and evolution. Accurate atomic data is
essential for the reliable interpretation and modeling of astrophysical
spectra. In this work, we perform laboratory studies on neutral aluminium. This
element is found, for example, in young, massive stars and it is a key element
for tracing ongoing nucleosynthesis throughout the Galaxy. The near-infrared
(NIR) wavelength region is of particular importance, since extinction in this
region is lower than for optical wavelengths. This makes the NIR wavelength
region a better probe for highly obscured regions, such as those located close
to the Galactic center.
  We investigate the spectrum of neutral aluminium with the aim to provide
oscillator strengths (f-values) of improved accuracy for lines in the NIR and
optical regions (670 - 4200 nm).
  Measurements of high-resolution spectra were performed using a Fourier
transform spectrometer and a hollow cathode discharge lamp. The f-values were
derived from experimental line intensities combined with published radiative
lifetimes.
  We report oscillator strengths for 12 lines in the NIR and optical spectral
regions, with an accuracy between 2 and 11%, as well as branching fractions for
an additional 16 lines.
