Penning-trap Q-value determination of the Ga-71(v, e(-))Ge-71 reaction using threshold charge breeding of on-line produced isotopes
Back to previous page
| Authors: | Frekers, D; Simon, MC; Andreoiu, C; Bale, JC; Brodeur, M; Brunner, T; Chaudhuri, A; Chowdhury, U; Lopez-Urrutia, JRC; Delheij, P; Ejiri, H; Ettenauer, S; Gallant, AT; Gavrin, V; Grossheim, A; Harakeh, MN; Jang, F; Kwiatkowski, AA; Lassen, J; Lennarz, A; Luichtl, M; Ma, T; Macdonald, TD; Mane, E; Robertson, D; Schultz, BE; Simon, VV; Teigelhofer, A; Dilling, J |
| Year: | 2013 |
| Journal: | Physics Letters B 722: 233-237 Article Link (DOI) |
| Title: | Penning-trap Q-value determination of the Ga-71(v, e(-))Ge-71 reaction using threshold charge breeding of on-line produced isotopes |
| Abstract: | We present a first direct Q-value measurement of the Ga-71(v, e(-))Ge-71 reaction using the TITAN mass-measurement facility at ISAC/TRIUMF. The measurements were performed in a Penning trap on neon-like Ga-71(21+) and Ge-71(22+) using isobar separation of the on-line produced mother and daughter nuclei through threshold charge breeding in an electron-beam ion trap. In addition, isoionic samples of Ga-71(21+) and Ge-71(21+) were stored concurrently in the Penning trap and provided a separate Q-value measurement. Both independent measurements result in a combined Q-value of 233.5 +/- 1.2 keV, which is in agreement with the previously accepted Q-value for the v cross-section calculations. Together with a recent measurement of the v-response from the excited states in Ge-71, we conclude that there are no further uncertainties in the nuclear structure, which could remove the persistent discrepancy between the SAGE and GALLEX calibration measurements performed with neutrinos from reactor-produced Cr-51 and Ar-37 sources and the theoretical expectation. (c) 2013 Elsevier B.V. All rights reserved. |
Departmental members may update their publication list.