Tony Liu

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Isotopic distributions for light particles and intermediate mass fragments have been measured for isotone, and isobar yield ratios are utilized to estimate the isotopic composition of the gas phase at freeze-out. Analyses within the equilibrium limit imply that the gas phase is enriched in neutrons relative to the liquid phase represented by bound nuclei.(More)
Geckos have the extraordinary ability to prevent their sticky feet from fouling while running on dusty walls and ceilings. Understanding gecko adhesion and self-cleaning mechanisms is essential for elucidating animal behaviours and rationally designing gecko-inspired devices. Here we report a unique self-cleaning mechanism possessed by the nano-pads of(More)
Collisions of 112 Sn and 124 Sn nuclei, which differ in their isospin asymmetry, provide information about the rate of isospin diffusion and equilibration. Although several different probes can provide accurate diffusion measurements, the ratios of the mirror nuclei may be the simplest and most promising one. Ratios of the mass seven mirror nuclei yields(More)
The characteristics of intermediate mass fragments (IMFs: 3 Z 20) produced in midperipheral and central collisions are compared. We compare IMFs detected at midvelocity with those evaporated from the excited projectilelike fragment (PLF *). On average, the IMFs produced at midvelocity are larger in atomic number, exhibit broader transverse velocity(More)
124 Sn+ 124 Sn collisions at E/A = 50 MeV and compared with predictions of stochastic mean field calculations. These calculations predict a sensitivity of the isotopic distributions to the density dependence of the asymmetry term of the nuclear equation of state. However, the secondary decay of the excited fragments modifies significantly the primary(More)
Particle correlation functions from central 129 Xe+ 197 Au collisions at 50A MeV have been measured with a large area silicon-strip/ CsI detector array. A new technique of spin determination from particle correlation functions is proposed. Two examples of correlation functions are studied. The spin of the first excited level of 8 B at 0.774 MeV is(More)
Alpha particles emitted from an excited projectilelike fragment ͑PLF * ͒ formed in a peripheral collision of two intermediate-energy heavy ions exhibit a strong preference for emission towards the targetlike fragment. The interplay of the initial deformation of the PLF * caused by the reaction, Coulomb proximity, and the rotation of the PLF * results in the(More)
Projectilelike fragments ͑PLF, 15рZр46) formed in peripheral and midperipheral collisions of 114 Cd projectiles with 92 Mo nuclei at E/Aϭ50 MeV have been detected at very forward angles, 2.1°р␪ lab р4.2°. Calorimetric analysis of the charged particles observed in coincidence with the PLF reveals that the excitation of the primary PLF is strongly related to(More)
The defining characteristics of fragment emission resulting from the noncentral collision of 114 Cd ions with 92 Mo target nuclei at E/Aϭ50 MeV are presented. Charge correlations and average relative velocities for midvelocity fragment emission exhibit significant differences when compared to standard statistical decay. These differences associated with(More)