Unformatted text preview: Physics 5110 Homework 5 (due Feb 17)
March 9, 2010
The first three problems show how one can estimate the coefficients in the semiempirical mass formula. 1. Williams, problem 4.1. 2. Williams, problem 4.2. 3. Various experimentally determined energy levels of 40 Ar, 40 Ca, and 40 K 18 20 19 are shown in Williams, Fig 5.8. Explain the dotted line below the lowest 4019 K level from which + decay originates. Use the semi-empirical mass formula to calculate the masses of the three nuclides and compare your results with the experimental values for the energy levels shown there. (Be sure to convert to atomic masses, including the electrons.) 4. Williams, problem 5.6. Except do this starting with A = 242, Z = 94 and ending with 206 P b. Present your results in the form of Williams Table 82 5.2. The Lawrence Berkeley National Laboratory National Nuclear Data Center (see the course web resources page) has a handy chart of nuclides with a Java interactive interface for your web browser. 5. Extra credit. Williams, problem 4.3. Note that in some printings there 2 is an error. It should have R0 . 1 ...
View Full Document