A laser-induced optical force trap was used to alter the movement of chromosomes in mitotic cells in vitro. The trap was produced by using a 1.06-microns neodymium YAG (yttrium/aluminum garnet) laser focused through a phase-contrast microscope. The trap was applied to one side of centrophilic chromosomes off the mitotic spindle and to late-moving chromosomes on the mitotic spindle. In both situ...

A high-power multistripe diode-laser array has been used to pump miniature zigzag slab oscillators of Nd:YAG and Nd:glass. With Nd:YAG we have demonstrated output at 1.06 microm of 70-kW peak power and 585-mW average power with an electrical-to-optical efficiency of 4%. In this experiment the Nd:glass lasers were limited to 160-mW average power and less efficiency than the Nd:YAG. The differenc...

Single crystals of NdBO(2)MoO(4) were obtained from a molybdenum oxide-boron oxide flux under an air atmosphere. The structure features double chains of edge- and face-sharing distorted [NdO(10)] bicapped square-anti-prisms, which are linked by rows of isolated [MoO(4)] tetra-hedra and by zigzag chains of corner-sharing [BO(3)] groups, all of them running along the b axis. The chains of [NdO(10...

Yttrium aluminum perovskite (YAP) co-doped with CI3' and Nd3+ is of interest in laser applications because the chromium-neodymium energy transfer is more efficient in YAP than in YAG. Investigation of the energy transfer from the chromium R lines and pair states in the wavelength range 720-740 nm to the Nd3+ upper laser level shows that neither individual C? ions nor C?+-C? pairs are important ...

Heavy nuclei exhibit a crossover from vibrational to rotational collectivity as the number of neutrons or protons increases from shell closure towards midshell, but the microscopic description of this crossover has been a major challenge. We apply the shell model Monte Carlo approach to families of even-even samarium and neodymium isotopes and identify a microscopic signature of the crossover f...

Rhythmic bursting on the order of seconds in a cluster of plastic beads under continuous irradiation of a focused neodymium-doped yttrium aluminum garnet (Nd:YAG) laser beam (1064 nm) is reported. The oscillatory instability is induced as a result of competition between trapping and scattering forces, where both forces are induced by the focused laser beam. Above a critical power of the laser b...

We have used two neutron-scattering techniques to investigate the magnetic structure of neodymium. By observations of harmonic combinations of its modulation vectors we have deduced that the low temperature magnetic structure is quadruple-q. We have confirmed this by observing a single domain of the structure in a suitably aligned magnetic field. For more than twenty years, the magnetic orderin...