  Recent studies [Sci Rep 12, 11256 (2022)] on laser interaction (wavelength
800~nm, intensity $>10^{16}\, \Wcmcm$) with deuterium nano-cluster in an
ambient magnetic field ($B_0$) demonstrate that collisionless absorption of
laser occurs in two stages via anharmonic resonance (AHR) and
electron-cyclotron resonance (ECR) or relativistic ECR (RECR) processes.
Auxiliary $B_0$ enhances coupling of laser to cluster-electrons via improved
frequency-matching for ECR/RECR as well as phase-matching for prolonged
duration of the 5-fs (fwhm) broadband pulse and the average absorbed energy per
electron $\overline{\mathcal{E}}_A$ significantly jumps up $\approx 36-70$
times of its ponderomotive energy ($\Up$). In this paper, we report energy
dispersion of these energetic electrons and their angular distribution in
position and momentum space by performing hybrid-PIC simulations. By simulating
bigger clusters (radius $R_0 \approx 3-4$~nm) at high intensities $\approx
10^{16} - 10^{18}\,\Wcmcm$, we find $\overline{\mathcal{E}}_A\approx
36-70\,\Up$ similar to a small cluster ($R_0\approx 2$~nm), but total energy
absorption increases almost linearly with increasing cluster size due to more
number of available energy carriers.
