Mass Measurement on the rp-Process Waiting Point 72Kr

Details Mass Measurement on the rp-Process Waiting Point 72Kr Mass Measurement on the rp-Process Waiting Point 72Kr

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004phrvl..93p1104r&link_type=abstract

Physical Review Letters, vol. 93, Issue 16, id. 161104

Other

28

Nucleosynthesis In Novae, Supernovae, And Other Explosive Environments, Binding Energies And Masses, 59<=A<=89, Atomic Masses, Mass Spectra, Abundances, And Isotopes

Scientific paper

The mass of one of the three major waiting points in the astrophysical rp process 72Kr was measured for the first time with the Penning trap mass spectrometer ISOLTRAP. The measurement yielded a relative mass uncertainty of δm/m=1.2×10-7 (δm=8 keV). 73,74Kr, also needed for astrophysical calculations, were measured with more than 1 order of magnitude improved accuracy. We use the ISOLTRAP masses of 72 74Kr to reanalyze the role of 72Kr (T1/2=17.2 s) in the rp process during x-ray bursts and conclude that 72Kr is a strong waiting point delaying the burst duration with at least 80% of its β-decay half-life.

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