학술논문
Direct determination of the atomic mass difference of Re187 and Os187 for neutrino physics and cosmochronology
Document Type
Working Paper
Author
Source
Phys. Rev. C 90 (2014) 042501(R)
Subject
Language
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.
Comment: 5 pages, 4 figures
Comment: 5 pages, 4 figures