Independent normalization for <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>γ</mml:mi></mml:math> -ray strength functions: The shape method

The shape method, a novel approach to obtain the functional form of $\ensuremath{\gamma}$-ray strength function $(\ensuremath{\gamma}\mathrm{S}\mathrm{F})$, is introduced. In connection with Oslo method slope nuclear level density (NLD) and $\ensuremath{\gamma}\mathrm{S}\mathrm{F}$ can be obtained simultaneously even in absence neutron resonance spacing data. foundation lies primary transitions which preserve information on $\ensuremath{\gamma}\mathrm{S}\mathrm{F}$. has been applied $^{56}\mathrm{Fe}$, $^{92}\mathrm{Zr}$, $^{164}\mathrm{Dy}$, are representative cases for variety situations encountered typical NLD studies. comparisons results from those demonstrate that retained regardless structure details or ${J}^{\ensuremath{\pi}}$ values states fed by transitions.