Why cant electrons jump from a singlet ground state to a triplet exited state?

23 August 2024 0 3K Report

so according to the jeblonski diagram electrons get exited from the ground state first go to the singlet exited state than transition to a triplet exited state with a lower energy but if a triplet exited state requires lesser energy why does an electron not go to a triplet exited state directly?

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