rotational level

rotational level

[rō′tā·shən·əl ‚lev·əl]
(physical chemistry)
An energy level of a diatomic or polyatomic molecule characterized by a particular value of the rotational energy and of the angular momentum associated with the motion of the nuclei.
References in periodicals archive ?
The present study indicates that the rotational levels of a [C.sub.1] chiral molecule do not belong to any definite parity, rather to a mixed parity, and hence they do not follow the theory of molecular rotation.
Next we need clarify the meaning of parity mixing for the rotational levels of a [C.sub.1] chiral molecule.
Giacinto Scoles of Princeton University favors a different interpretation: The characteristic energy level isn't observed because at 0.15 K, the complex may have too little energy to reach the rotational levels permitted by quantum mechanics and thus may not rotate at all.