Energy Levels ofHo166

Nuclear levels in166Ho: Evidence for a large configuration mixing

“…The assignment of the ground state configuration has been shown to be consistent with (d, p), (n, 7') and (n, e --) data by Motz et al [7], and assignments up tO the 7-state of the KS= 0-band have been made [7]. The 7-, 8-, and 9-states of the K~=7 -band of the ground state configuration were proposed in the analysis of Motz [7], as well as assignments of several states in rotational bands of excited neutron configurations formed by successively coupling the 7-[523] proton to the 89 ~- [523], and ~-[512] neutron [7]. Five states of the Kn=5 + and 2 + bands of the ~+ [41t] +7+ [633] excited proton configuration were assigned from the (n, 7) and (n, e-) data [7].…”

“…The 7-, 8-, and 9-states of the K~=7 -band of the ground state configuration were proposed in the analysis of Motz [7], as well as assignments of several states in rotational bands of excited neutron configurations formed by successively coupling the 7-[523] proton to the 89 ~- [523], and ~-[512] neutron [7]. Five states of the Kn=5 + and 2 + bands of the ~+ [41t] +7+ [633] excited proton configuration were assigned from the (n, 7) and (n, e-) data [7]. These states were observed to decay to the 7- [633] configuration can be determined from the cross sections populating these states in a single-particle transfer reaction.…”

Microscopic description of vibrational degrees of freedom in odd-odd isotopes of Ho

“…However, in view of the large number of gamma rays observed in the 165Ho (n,?) 166Ho reaction [4], either or both of these placements may be coincidental. In any case the conclusive determination of the energy of the 5-state in the vicinity of 260 keV in 166Ho stands as a challenge for experimentalists.…”

“…The condition of solvability of this system of equations leads to the secular equation for the excitation energy, t/p~" det I[a~,,,~,(a,+ e~+ (rsl gnplrS}oyv--np~ ) 4 F~sl,~ +G~ +cog…”

“…2.2. For an axially symmetric rotor, with rotational axis perpendicular to the symmetry axis of the deformed nuclear average field, the rotational part Hro t consists of a pure rotation term, Coriolis interaction and the centrifugal term: Hrot = He + Hct + Hi, (2) where (4) Kp where b~ are the Coriolis mixing coefficients; M and K are the angular momentum projections in the laboratory and the intrinsic systems, respectively; and ~ and p are the additional quantum numbers characterizing a given state. The symbol IUMKp) represents the symmetrized product of the Wigner functions D~K and the intrinsic wave function I~p(K~)) [32] =1/ 2I + 1…”