Heavy particle radioactivities of superheavy nuclei

TL;DR

This paper redefines heavy particle radioactivity to include larger emitted particles from superheavy nuclei, showing potential for HPR to surpass alpha decay in certain regions and predicting extremely short half-lives for some isotopes.

Contribution

It introduces a modified concept of HPR for superheavy nuclei and provides calculations indicating regions where HPR dominates over alpha decay.

Findings

HPR can involve particles with Z_e>28 from nuclei with Z>110.

Predicted half-lives for some isotopes are in the nanosecond to picosecond range.

HPR may be more prominent than alpha decay in specific superheavy nuclei.

Abstract

The concept of heavy particle radioactivity (HPR) is changed to allow emitted particles with Z_e>28 from parents with Z>110 and daughter around 208Pb. Calculations for superheavy (SH) nuclei with Z=104-124 are showing a trend toward shorter half-lives and larger branching ratio relative to alpha decay for heavier SHs. It is possible to find regions in which HPR is stronger than alpha decay. The new mass table AME11 and the theoretical KTUY05 and FRDM95 masses are used to determine the released energy. For 124 we found isotopes with half-lives in the range of ns to ps.