Incomplete absorption reactions at high energy

The total reaction cross section of high-energy nucleus-nucleus collision refects the nuclear density profiles colliding nuclei and has been a standard tool to investigate size properties short-lived unstable nuclei. This basis relies on assumption that is strongly absorptive in sense an optical model. However, this property does not hold completely, while incomplete absorption occurs when overlap two low enough. In paper, we propose way quantify incompleteness, is, "blackness" section. A significance quantification drawn by taking example sections proton-rich C isotopes.