The Regulated NiCu Cycles with the New ⁵⁷Cu(p,γ)⁵⁸Zn Reaction Rate and Its Influence on Type I X-Ray Bursts: the GS 1826–24 Clocked Burster

During the X-ray bursts of GS 1826$-$24, "clocked burster", nuclear reaction flow that surges through rapid-proton capture process path has to pass NiCu cycles before reaching ZnGa moderate further extent hydrogen burning in region above germanium and selenium isotopes. The $^{57}$Cu(p,$\gamma$)$^{58}$Zn located plays an important role influencing burst light curves as found by Cyburt et al. (2016). We deduce rate based on experimentally determined structure information, isobaric-multiplet-mass equation, large-scale shell model calculations. Based we propose a possible order $1^+_1$ $2^+_3$ dominant resonance states constrain energy $1^+_2$ state. latter reduces contribution new is up factor four lower than Forstner (2001) recommended JINA REACLIB v2.2 at temperature regime sensitive clocked 1826$-$24. Using simulation from one-dimensional implicit hydrodynamic code, KEPLER, thermonuclear 1826$-$24 burster, find coupled with latest $^{56}$Ni(p,$\gamma$)$^{57}$Cu $^{55}$Ni(p,$\gamma$)$^{56}$Cu rates redistributes strongly influences ash composition, whereas $^{59}$Cu(p,$\alpha$)$^{56}$Ni $^{59}$Cu(p,$\gamma$)$^{60}$Zn reactions suppress influence diminish impact by-passes $^{56}$Ni waiting point induced curve.