Mass measurements along the rp-process path using the Canadian Penning trap mass spectrometer

Details Mass measurements along the rp-process path using the Canadian Penning trap mass spectrometer Mass measurements along the rp-process path using the Canadian Penning trap mass spectrometer

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aps..dnp.cd005c&link_type=abstract

American Physical Society, Division of Nuclear Physics Fall Meeting, October 30 - November 1, 2003, Tucson, Arizona, MEETING ID:

Physics

Nuclear Physics

Scientific paper

The processes responsible for the creation of elements more massive than iron are not well understood. A possible scenario for their production involves the rapid capture of protons (rp-process), which is thought to occur in explosive astrophysical events such as novae and X-ray bursts. Mass measurements of the nuclides involved with uncertainties on the order of 100 keV or better are critical to determine the energy output of the events, the resulting nuclide abundances, and the process 'path' including its termination. 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 contribution will discuss the precise (< 30 keV) mass measurements made of isotopes along the rp-process path using the Canadian Penning Trap mass spectrometer (located at the ATLAS facility of the Argonne National Laboratory). Most notably, our results include the masses of two critical waiting-point nuclides, ^64Ge and ^68Se, and masses of isotopes near the proposed end-point of the rp-process path. This work was supported by grants from the Natural Sciences and Engineering Research Council of Canada and by the U.S. Department of Energy, Nuclear Physics Division, under Contract W-31-109-ENG-38.

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