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## Vol. 7, No. 5 (1950)

##### Topics
###### CONTENT
1950, 14 (5): 1-8. doi: 10.7498/aps.7.1
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1950, 14 (5): 9-23. doi: 10.7498/aps.7.9
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The binding energies of the atomic nuclei 2H, 3H, 3He and 4He are obtained by means of the varialional method, using as a basis the Mφller-Rosenfeld nuclear potential. A simple choice of the wave function renders the calculation elementary. Agreement with experimental results is good, except that the binding energy obtained for 4He is excessive, which indicates the necessity of further improving upon the nuclear potential.
1950, 14 (5): 24-38. doi: 10.7498/aps.7.24
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It is shown that the discrepancy between the experimental values for the binding energies of 3H and 4He and the calculated values based on the Mφller-Rosenfeld nuclear potential with a meson mass of 286 electron mass cannot be removed by further refinement in the choice of the form of the wave functions.
1950, 14 (5): 39-61. doi: 10.7498/aps.7.39
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The binding energies of the atomic nuclei 2H, 3H, 3He and 4He are examined here with a nuclear potential based on the meson theory where the hypothesis of charge independence is given up. Preliminary calculation indicates that the interaction of mucleons with the neutral meson field does not contain the factor r3 and that the mass of the neutral meson is some what larger than that of the charged meson.
1950, 14 (5): 62-75. doi: 10.7498/aps.7.62
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A relaxational bulk visco-elastic theory is formulated, leading to an equation recently assumed by Hall. A derivation is given of an expression for the coefficient of sound attenuation resulting from both shearing and bulk viscosities. The result is compared with classical hydrodynamics generalized in a manner similar to that given by Tisza.
1950, 14 (5): 76-82. doi: 10.7498/aps.7.76
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1950, 14 (5): 83-91. doi: 10.7498/aps.7.83
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