Program - Brookhaven National Laboratory

Session JA Nuclear Structure and Decay
Wednesday March 6, 2013
Room: Met East at 10:30 AM
JA 1 10:30 AM
The 2012 Atomic Mass Evaluation and the Mass Tables
Georges Audi, Meng Wang, Aaldert H. Wapstra*, Filip G. Kondev, Marion Mac Cormick, Xing Xu,
Bernd Pfeiffer
CSNSM, IN2P3-CNRS, Univ. Paris-Sud, Bâtiment 108, F-91405 Orsay Campus, France
IMP, CAS, 509 Nanchang Rd., Lanzhou 730000, China
Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany
NIKHEF, 1009DB Amsterdam, The Netherland
Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA
IPN-Orsay, IN2P3-CNRS, Univ. Paris-Sud, Bâtiment 100, F-91405 Orsay Campus, France
GSI Helmholtzzentrum für Schwerionenforschung, Planckstr. 1, D-64291 Darmstadt, Germany
Graduate University of Chinese Academy of Sciences, Beijing, 100049, People’s Republic of China
As announced at the ND2010, the new Atomic Mass Tables will soon be released. The publication is due
for December 2012 in the “Chinese Physics C” journal. This new publication will include all material that
is available to us. The Atomic Mass Tables are the fruit of the evaluation of all valid experimental data
aiming at mass measurements, or in which relevant energy measurements are given. Among the various
projects that originated in the 1950’s, the concept developed by Aaldert H. Wapstra, proved to be able to
face the otherwise insolvable difficulties due to the strong interconnections among the measurements. This
concept is the one that is referred to as the Atomic Mass Evaluation (Ame)ö. It was the only one which
survived and produced a series of Mass Tables over the years, the most recent of those, in 1983, 1993,
and 2003. At the conference we will present the new policies and procedures used and also some of the
most important features of our knowledge of the nuclear properties stemming from the surface of masses
as it appears nowadays. Among the co-authors of the coming AME2012 tables is the name of Aaldert H.
Wapstra, the founder of the AME, who passed away at the end of 2006. He made essential contributions
to the AME2012 during the two years following the publication of AME2003. And more than those two
years, this work is filled with his spirit. *Deceased, December 2006.
[1] G. Audi, A.H. Wapstra, and C. Thibault Nucl. Phys. A 729, 337 (2003) and reference therein. [2]
Bulletins of the Amdc: http://amdc.in2p3.fr/bulletins/filel.html.
JA 2 11:00 AM
Precision Atomic Mass Measurements for Nuclear Data Applications
Ari Jokinen
Department of Physics, University of Jyvaskyla
Mass of the atomic nucleus is a basic observable which contains information of its constituents and forces
acting between them. If atomic masses are known precisely enough, differences of atomic masses give
insight for the underlying nuclear structure. A unique combination of IGISOL technique and JYFLTRAP
has allowed systematic studies of atomic masses over large range of fission products, as reviewed in [1].
Roughly 200 atomic masses of neutron-rich fission products have been measured at JYFLTRAP with the
typical precision in 1-10 keV regime. When combined with the data from other Penning trap facilities,
the systematic data spans more than 300 neutron-rich isotopes. Such data sets provide an important
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