Variational methods for4Heusing a modern He-He potential

Calculations of the binding energies of weakly bound He–He–H, He–He–H− and He–H–H molecules

We searched for the existence of weakly bound He–He–H, He–He–H− and He–H– H molecules where the binding energies are expected to be of the order of degrees Kelvin. By employing the best empirical interaction between each pair of particles, we solved the Schrödinger equation for the triatomic systems using hyperspherical coordinates in the adiabatic approximation. We found no bound states for 4H...

Autoionization of He and Autodetachment of He- following Bombardment by H+, H2+, He+, and He Atoms

He breakup dynamic polarization potential reexamined

The dynamic polarization potential contribution to the effective interaction between 6He and 208Pb at 27 MeV, due to breakup channels, is recalculated exploiting a recently developed improved model for 6He. The most general features of the long-range attractive and absorptive components remain the same as were found in an earlier study, but the asymptotic magnitudes are reduced by factors of ab...

? ' he Variational Approach to Shape from Shading Berthold

We develop a systeniatic approach to the discovery of parallel iterative echetnrs for s o h i n g t,he sIlape-fro~i~-sl~i~;iirlg problem on a grid. 12 standard procednse Sol-firltlirlg such schetncs is ontlincti, arid s~il,scqncntly usrd to cleri?.c s c ~ e r a i new ones. ' T l ~ c s slli~j)e-froti1-s11i~~lir~g problcni is known to bc ~ i l a t h c ~ i i n i icail) etjrlivAent to a aon-linear ...

Thermodynamics of Liquid 'he- " He Mixtures

The osmotic pressure of 3He-4He solutions is shown to follow in a natural way from the separation of the specific heat in a quasiparticle contribution and a 4He-contribution. Expressions for important thermodynamic properties such as the chemical potentials, the internal energy, the entropy, specific heat, osmotic pressure, etc. are given for the case the quasiparticle gas can be treated as a n...