Quantum tunneling of hydrogen atom transfer affects mandrel degradation in inertial confinement fusion target fabrication.

ABSTRACT: Poly-α-methylstyrene (PAMS) is considered as the preferred mandrel material, whose degradation is crucial for the fabrication of high-quality inertial confinement fusion (ICF) targets. Herein, we reveal that hydrogen atom transfer (HAT) during PAMS degradation, which is usually attributed to the thermal effect, unexpectedly exhibits a strong high-temperature tunneling effect. Specifically, although the energy barrier of the HAT reaction is only 10^-2 magnitude different from depolymerization, the tunneling probability of the former can be 14-32 orders of magnitude greater than that of the latter. Furthermore, chain scission following HAT will lead to a variety of products other than monomers. Our work highlights that quantum tunneling may be an important source of uncertainty in

SUBMITTER: Zhu Y 

PROVIDER: S-EPMC8733146 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature