January 2017

Journal

β decay of 6He into the α + d continuum

By:
Pfutzner, M.; Dominik, W.; Janas, Z.; Mazzocchi, C.; Pomorski, M.; Bezbakh, A.; Borge, M.; Chrapkiewicz, K.; Chudoba, V.; Frederickx, R.; Kaminski, G.; Kowalska, M.; Krupko, S.; Kuich, M.; Kurcewicz, M.; Lis, A.; Lund, M.; Miernik, K.; Perkowski, J.; Raabe, R.; Randisi, G.; Riisager, K.; Sambi, S.; Tengblad, O.; Wenander, F.
Journal Name:
Physical Review C
Page Number:
14316-14316
Volume:
92
Issue Number:
1
Publication Date:
January 9, 2017
View DOI Listing:
https://doi.org/10.1103/PhysRevC.92.014316

Abstract

The rare beta-decay channel of He-6 into the alpha + d continuum was investigated at the REX-ISOLDE facility. Bunches of postaccelerated He-6 ions were implanted into the optical time projection chamber (OTPC), where the decays with emission of charged particles were recorded. This novel technique allowed us to extend the low-energy end of the spectrum down to 150 keV in alpha + d center of mass, corresponding to a deuteron energy of 100 keV. The branching ratio for this process amounts to [2.78 +/- 0.07(stat) +/- 0.17(sys)] x 10(-6). The shape of the spectrum is found to be in a good agreement with a three-body model, while the total intensity is about 20% larger than the predicted one.