Direct determination of the atomic mass difference of Re187 and Os187 for neutrino physics and cosmochronology

Abstract

For the first time a direct determination of the atomic mass difference of 187Re and 187Os has been performed with the Penning-trap mass spectrometer SHIPTRAP applying the novel phase-imaging ion-cyclotron-resonance technique. The obtained value of 2492(30stat)(15sys) eV is in excellent agreement with the Q values determined indirectly with microcalorimetry and thus resolves a long-standing discrepancy with older proportional counter measurements. This is essential for the determination of the neutrino mass from the beta-decay of 187Re as planned in future microcalorimetric measurements. In addition, an accurate mass difference of 187Re and 187Os is also important for the assessment of 187Re for cosmochronology.

arXiv comment5 pages, 4 figures

References in corpus (5)

• PENTATRAP: A novel cryogenic multi-Penning trap experiment for high-precision mass measurements on highly charged ions
• A bolometric measurement of the antineutrino mass
• The trap design of PENTATRAP
• New s-process path and its implication to 187Re-187Os nucleo-cosmochronometer
• Position-sensitive ion detection in precision Penning trap mass spectrometry

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