منابع مشابه
Ion Cyclotron Resonance Heating in a Toroidal Octupole
A 1 MW� 2 msec pulse of rf power at the ion cyclotron frequency (2.6 MHz) has been used to heat the ions from < 1 eV to 350 eV in a toroidal octupole device. The ion temperature is limited by charge exchange loss and agrees quantitatively with theoretical predictions. No parametric decay waves, enhanced diffusion, or other deleterious effects except for a high neutral re flux are observed to a...
متن کاملHeavy-resonance production in high-energy nuclear collisions.
We estimate freezeout conditions for s, c, and b quarks in high energy nuclear collisions. Freezeout is due either to loss of thermal contact, or to particles “wandering” out of the region of hot matter. We then develop a thermal recombination model in which both single-particle (quark and antiquark) and two-particle (quark-antiquark) densities are conserved. Conservation of twoparticle densiti...
متن کاملDouble-octupole states in 208Pb.
The states of 208Pb are calculated in a 24 orbit model space which includes all excitations up to two particles and two holes beyond the closed shell. All of the known low-lying states are reproduced by this model. The observed distributions of electromagnetic excitation strength from the ground state to low-lying excited states are well described by the model. The double-octupole excitation st...
متن کاملOctupole Transitions in the 208 Pb Region Octupole Transitions in the Pb Region
The Pb region is characterised by the existence of collective octupole states. Here we populated such states in Pb + Pb deep-inelastic reactions. γ-ray angular distribution measurements were used to infer the octupole character of several E3 transitions. The octupole character of the 2318 keV 17− → 14 in Pb, 2485 keV 19/2− → 13/2 in Pb, 2419 keV 15/2− → 9/2 in Pb and 2465 keV 17/2 → 11/2− in Tl...
متن کاملAnalytic Description of Critical Point Actinides in a Transition from Octupole Deformation to Octupole Vibrations
An analytic collective model in which the relative presence of the quadrupole and octupole deformations is determined by a parameter (φ0), while axial symmetry is obeyed, is developed. The model [to be called the analytic quadrupole octupole axially symmetric model (AQOA)] involves an infinite well potential, provides predictions for energy and B(EL) ratios which depend only on φ0, draws the bo...
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ژورنال
عنوان ژورنال: Physical Review C
سال: 1996
ISSN: 0556-2813,1089-490X
DOI: 10.1103/physrevc.54.72