Oscillator spacing and its A dependence

Approximate expressions for the nucleon oscillator spacing h(cross) omega N as a function of A in nuclei are derived using a recently proposed semi-phenomenological density distribution, based on the separation energies of the last neutron or proton. A comparison is made with another study of h(cross) omega N as a function of A, which was carried out employing a Fermi distribution with parameters rho 0 and a determined by fitting to experimental values of charge RMS radii of nuclei. The same problem in the case of a hyperon in hypernuclei is also discussed; a comparison is made with the nuclear case; and certain comments are made.

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