Evolution from spherical single-particle structure to stable triaxiality at high spins inNd140

Nuclear Structure at High Spins

Nuclear structure at the highest spins is very likely to involve both collective and single-particle aspects. The liquid-drop model favors shapes that imply combinations of collective (rotational) and rotation-aligned single-particle angular momenta. The detailed band structures for the full range of such mixtures are considered. Nuc le i are composed o f a smal l ( b u t n o t t o o sma l l ) ...

Nuclei at High Spins : a Summary

Quantum spherical spins with local symmetry.

We construct a quantum system of spherical spins with a continuous local symmetry. The model is exactly soluble in the thermodynamic limit and exhibits a number of interesting properties. We show that the local symmetry is spontaneously broken at finite as well as zero temperatures, implying the existence of classical and quantum phase transitions with a nontrivial critical behavior. The dynami...

Posner molecules: from atomic structure to nuclear spins.

We investigate "Posner molecules", calcium phosphate clusters with chemical formula Ca9(PO4)6. Originally identified in hydroxyapatite, Posner molecules have also been observed as free-floating molecules in vitro. The formation and aggregation of Posner molecules have important implications for bone growth, and may also play a role in other biological processes such as the modulation of calcium...

evolution of laparoscopic cholecystectomy: from multiport to single port

evidence acquisition a systematic literature searching of databases medline, embase, and google scholar was done from 1982 and updated in december 2015. search terms were “cholecystectomy”, “laparoscopic cholecystectomy”, “four port laparoscopic cholecystectomy”, “single-incision laparoscopic surgery”. context laparoscopic approach with its several techniques has become the standard method for ...