6533b7d0fe1ef96bd125b694

RESEARCH PRODUCT

Stable triaxiality at the highest spins in138Ndand139Nd

P. SpolaoreA. Galindo-uribarriR. M. LiederG. FalconiD. WardR. MenegazzoC. Rossi AlvarezT. KröllD. BazzaccoA. V. AfanasjevA. V. AfanasjevS. LunardiW. GastP. FallonGregory LaneA. O. MacchiavelliC. M. PetracheIngemar RagnarssonM. CromazG. Lo Bianco

subject

PhysicsNuclear and High Energy PhysicsSpinsNuclear TheoryAtomic physicsMoment of inertiaSpin (physics)

description

The nuclei ${}^{138}\mathrm{Nd}$ and ${}^{139}\mathrm{Nd}$ have been studied at very high spins via the ${}^{48}\mathrm{Ca}{+}^{94}\mathrm{Zr}$ reaction. Several new rotational bands were observed, four in ${}^{138}\mathrm{Nd}$ and two in ${}^{139}\mathrm{Nd}.$ The ${J}^{(2)}$ moments of inertia calculated from the observed $\ensuremath{\gamma}$-ray energies are very small and almost constant, indicating that these bands are triaxial. Cranked Nilsson-Strutinsky calculations reproduce the general behavior of the bands, supporting this interpretation and suggesting an approximately constant $\ensuremath{\gamma}$ value of $\ensuremath{\sim}+35\ifmmode^\circ\else\textdegree\fi{}$ over a large spin range up to the highest observed spins. These bands and a few similar bands in other nuclei of the $N\ensuremath{\approx}80$ region are a unique example of almost undisturbed triaxial bands.

https://doi.org/10.1103/physrevc.61.011305