Nuclear level density and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>γ</mml:mi></mml:math> -ray strength function of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>Ni</mml:mi><mml:mprescripts /><mml:none /><mml:mn>63</mml:mn></mml:mmultiscripts></mml:math>

The nuclear level density (NLD) and $\ensuremath{\gamma}$-ray strength function ($\ensuremath{\gamma}\mathrm{SF}$) of $^{63}\mathrm{Ni}$ have been investigated using the Oslo method. extracted NLD is compared with previous measurements particle evaporation those found from neutron resonance spacing. $\ensuremath{\gamma}\mathrm{SF}$ was to feature a strong low-energy enhancement that could be explained as $M1$ based on large-scale shell model calculations. Comparison $\ensuremath{\gamma}\mathrm{SFs}$ measured method for various $\mathrm{Ni}$ isotopes reveals systematic changes below $5\phantom{\rule{0.222222em}{0ex}}\mathrm{MeV}$ increasing mass.