Study of the 171Tm nuclear structure by a massive transfer reaction

Fast decay of a three-quasiparticle isomer inTm171

“…[7,8] and the present work is in agreement. However, two excited members of the 7/2 + band, above the 636 keV level, had been tentatively identified by Drissi et al [7], with γ-ray transitions at 108, 129…”

“…The one-quasiparticle states (bandheads) shown in figure 1 have been assigned [7,8] the proton (π) However, it should be noted that this kind of calculation [15] has uncertainties ∼100 keV, so that the small (20 keV) difference between the experimental and calculated energies is fortuitous.…”

“…decay, as well as the members of the 7/2 − band, were known from previous work [7,8]. and 428 keV γ-ray events.…”

“…A previous study [7] of this nuclide with the same reaction had revealed rotational bands up to I = 19/2 built on the T 1/2 = 1.9 y, 1/2 + ground state and a 2.6 µs, 7/2 − state at 425 keV, each of one-quasiparticle character. A 1.3 ns, 7/2 + one-quasiparticle state at 636 keV is also well known [8].…”

Two-quasiparticle isomer,E1hindrances and residual interactions inTm172

“…The relative yield of γ rays associated with this structure were compared with γ rays known to belong to 171 Tm [10] and 173 Lu [11] in the excitation function. Its relative yield is highest in the 30-MeV measurement, whereas the relative yields of structures belonging to 171 Tm and 173 Lu are lower at 30 MeV than at higher energies.…”