Masses of New Isotopes in the fp Shell
During the past few years there has been a active program at the Argonne FN tandem accelerator aimed at the study of new isotopes far from beta stability. The particular region of the periodic table under investigation has been for 50 < A < 70, roughly the 1f-2p shell, on both sides of the valley of beta stability. Besides establishing the existence of previously unknown nuclides, the original scope of the program was to obtain information on the spectroscopic properties of parent and daughter for comparison with various nuclear models, and to measure the beta decay energies to compare with various predictions. In addition, calculations of explosive carbon burning during a supernova explosion rely on predicted masses of unknown neutron-rich nuclei in the iron region. Measurements of the masses of experimentally-accessible nuclei can help to decide which predictions are the most reliable to use in the nucleosynthesis calculations.
KeywordsMass Excess Endpoint Energy Total Reaction Cross Section Stretch Factor Beta Stability
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