Spin parity

A deformed even-even nuclide has energy levels characterized by the following values of spin, parity, and K value. You will note that not all of the information is given for each level. Fill in the blanks with the required values. In the appropriate space, assign each of the levels to a particular mode of excitation, for example, vibrational. Assume all bands are characterized by the same value of the moment of inertia. 

Using the shell model, calculate the ground-state spins, parities, and magnetic... 

A PWC function is defined as an (N — l)-electron bound parent state (atom or ion) with well-defined spin, parity, angular momentum and energy Ia = (Sa, na, La, Ea), coupled first to the spin-angular part of a single-particle state for the Nth electron, with definite orbital angular momentum la, to form a state with definite parity n, spin S, angular momentum L, and their projections L and M (for brevity, we indicate these global quantum numbers with the collective index T)... 

Fig. 2. Angular distributions of the 644-keV and 2225-keV gamma rays obtained at 3.4-MeV neutron energy used in assigning the spin-parity of the 2225-keV level as 2+.

However it is worth noting the similarity between both level schemes. The log ft value to the 1474 keV state is 4.8 which is ty pical of an allows 3 transition. Therefore we propose a tentative spin-parity assignment 11/2 to Tb according to an h /2 proton state. 

A tentative spin parity assignment of 7 has been made for the 12 s Eu state... 

Scheme 3 Example applications of spin parity to alternant non-Kekule hydrocarbons. All of these are predicted triplet ground states by Hund s law-based models such as that of Longuet-Higgins.65.

Scheme 5 Example applications of spin parity to heteroatom-containing systems.

Fig. 6 High spin polyradical PAM26 (26 radical sites), designed by Rajca group using spin parity modeling.

---