Experiments with thermalized rare isotope beams from projectile fragmentation: a precision mass measurement of the superallowed beta emitter 38Ca |
| |
Authors: | Bollen G Davies D Facina M Huikari J Kwan E Lofy P A Morrissey D J Prinke A Ringle R Savory J Schury P Schwarz S Sumithrarachchi C Sun T Weissman L |
| |
Institution: | National Superconducting Cyclotron Laboratory. Michigan State University, East Lansing, Michigan, USA. bollen@nscl.msu.edu |
| |
Abstract: | The mass of the short-lived radio nuclide 38Ca (T(1/2) = 440 ms) has been measured with the 9.4-T Penning trap mass spectrometer of the Low-Energy Beam and Ion Trap Facility. A mass uncertainty of deltam = 280 eV has been achieved, corresponding to deltam/m = 8 x 10(-9). The result makes 38Ca, a superallowed beta emitter, a new candidate to test the conserved-vector-current hypothesis. The experiment is also the first demonstration that short-lived radioactive isotopes produced by projectile fragmentation of relativistic heavy-ion beams can be slowed down and prepared such that precision experiments of this kind are possible. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|