Physics – Nuclear Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004nupha.746..342c&link_type=abstract
Nuclear Physics A, Volume 746, p. 342-346.
Physics
Nuclear Physics
5
Scientific paper
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.
Barber C. R.
Blank Basil
Boudreau C.
Buchinger F.
Clark Adam J.
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