activationless

比較不可

(physics, chemistry) Having an activation energy near 0

日本語の意味

（物理学、化学の分野で）活性化エネルギーがほぼまたは実質的にゼロである状態

The newly discovered catalyst enabled an activationless reaction pathway at room temperature, greatly increasing efficiency.

その新たに発見された触媒は室温で活性化エネルギーがほぼゼロの反応経路を可能にし、効率を大幅に高めた。

意味（1）

(physics, chemistry) Having an activation energy near 0

In this case, ionization is activationless, i.e. its rate constant is extemely large and independent of potential.