Rotational angular momentum operators

Again, the rotational kinetic energy, which is the full rotational Hamiltonian, can be written in terms of the total rotational angular momentum operator J2 and the component of angular momentum along the axis with the unique principal moment of inertia ... 

Again, the square of the total rotational angular momentum operator appears in Hj-ot... 

Here Pr and Pr are the momentum operators corresponding to the respective Jacobi distances, j is the BC rotational angular momentum operator associated with the Jacobi angle 7. The quantity fi defines the three-body uniform reduced mass, p = y/mpjnRmc/ niR J- me J- me) (where mx is the mass of the nuclei X), and I is the three-body moment of inertia / = pi 2r2/(i 2 + r2). 

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