https://doi.org/10.1140/epja/i2009-10808-4
Regular Article - Experimental Physics
Precision Penning trap mass measurements of rare isotopes produced by projectile fragmentation
1
National Superconducting Cyclotron Laboratory, Michigan State University, 48824, East Lansing, MI, USA
2
GSI, Planckstrasse 1, 64291, Darmstadt, Germany
3
Department of Physics and Astronomy, Michigan State University, 48824, East Lansing, MI, USA
4
Department of Chemistry, Michigan State University, 48824, East Lansing, MI, USA
5
TRIUMF, 4004 Wesbrook Mall, V6T 2A3, Vancouver, BC, Canada
6
Atomic Physics Laboratory, RIKEN, 2-1 Hirosawa, 351-0198, Wako, Saitama, Japan
* e-mail: schwarz@nscl.msu.edu
Received:
31
December
2008
Revised:
21
March
2009
Accepted:
9
April
2009
Published online:
30
May
2009
The low-energy beam and ion trap facility LEBIT at NSCL/MSU is at present the only facility where precision experiments are performed with stopped rare isotope beams produced by fast-beam fragmentation. LEBIT combines high-pressure-gas stopping with advanced ion manipulation techniques to provide brilliant low-energy beams. So far these beams have mainly been used for mass measurements on short-lived rare isotopes with a 9.4T Penning trap mass spectrometer. Recent examples include 70m Br , located at the proton dripline, 32Si and the iron isotopes 63-65Fe . While the measurement of 32Si helps to solve a long-standing dispute over the validity of the isobaric multiplet mass equation (IMME) for the A = 32 , T = 2 multiplet, the mass measurements of 65m,g Fe marked the first time a nuclear isomeric state has been discovered by Penning trap mass spectrometry.
© SIF, Springer-Verlag Berlin Heidelberg, 2009