α decay of ${}^{271-294}$115 superheavy nuclei is studied using the Coulomb and proximity potential model for deformed nuclei (CPPMDN). The predicted α half-lives of ${}^{287}$115 and ${}^{288}$115 nuclei and their decay products are in good agreement with experimental values. Comparison of α and spontaneous fission half-lives predicts four-α chains and three-α chains, respectively, from ${}^{287}$115 and ${}^{288}$115 nuclei and are in agreement with experimental observation. Our study predicts two-α chains from ${}^{273,274,289}$115, three-α chains from ${}^{275}$115, and four-α chains consistently from ${}^{284,285,286}$115 nuclei. These observations will be useful for further experimental investigation in this region.

• Received 7 June 2011

DOI:https://doi.org/10.1103/PhysRevC.84.024609