Elsevier

Nuclear Physics A

Volume 746, 27 December 2004, Pages 342-346
Nuclear Physics A

Precise mass measurements of astrophysical interest made with the Canadian Penning trap mass spectrometer

https://doi.org/10.1016/j.nuclphysa.2004.09.051Get rights and content

The processes responsible for the creation of elements more massive than iron are not well understood. Possible production mechanisms involve the rapid capture of protons (rp-process) or the rapid capture of neutrons (r-process), which are thought to occur in explosive astrophysical events such as novae, x-ray bursts, and supernovae. Mass measurements of the nuclides involved with uncertainties on the order of 100 keV or better are critical to determine the process ‘paths’, the energy output of the events, and the resulting nuclide abundances. Particularly important are the masses of ‘waiting-point’ nuclides along the rp-process path where the process stalls until the subsequent β decay of the nuclides. This paper will discuss the precise mass measurements made of isotopes along the rp-process and r-process paths using the Canadian Penning Trap mass spectrometer, including the mass of the critical waiting-point nuclide 68Se.

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This work was supported by the U.S. Department of Energy, Office of Nuclear Physics, under Contract No. W-31-109-ENG-38, and by NSERC of Canada.

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