Hydrogen isotope and 3He impurities in liquid 4He

Recently Reynolds, Hayden and Hardy analyzed atomic deuterium lifetimes in a cell with walls covered by a saturated 4He film. They were able to determine the deuterium chemical potential in 4He and also discussed the possibility of estimating its effective mass. These measurements inspired the authors attempt to understand the properties of hydrogen isotope impurities in liquid 4He using the extended Jastrow-Feenberg theory based on the correlated wave function. Here the results for hydrogen isotope chemical potentials in the bulk 4He as a function of density are presented. The accuracy of the method is tested by calculating the chemical potential of the 3He impurity. Good agreement is found with existing measurements. The effective masses of the hydrogen impurities are also calculated. For deuterium the authors predict a value meff = 4 mD