The Atomic Mass Evaluation: Present and Future WANG Meng Institute of Modern Physics, CAS ARIS2014, Tokyo, June 2.

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Presentation transcript:

The Atomic Mass Evaluation: Present and Future WANG Meng Institute of Modern Physics, CAS ARIS2014, Tokyo, June 2

Outline Introduction atomic mass, measurement, evaluation … Present status publication of AME2012, comparison with AME03… Some considerations about future correlation, workload… …

Atomic mass Nuclear physics Nuclear astrophysics Atomic physics Atomic energy Fundamental symmetries Metrology … mass→ binding energy → interaction

Mass spectroscopy 19 th century, weights of elements 1913, discovery of isotopism Magic number deformation island of inversion … “100 years of Mass Spectrometry” International Journal of Mass Spectrometry, Volumes 349–350 (2013) Edited by Dr. Yuri Litvinov and Dr. Klaus Blaum

5 Mass ratio M[ 33 S + ]/M[ 32 SH + ] Mass measurement: inertial mass energy Relative Measurements Mass measurements Energy released from neutron capture of 32 S 32 S + n - 33 S = (33) keV 33 S- ( 32 S + H) = (30) μu

Atomic mass evaluation M.S. Livingston, H.A. Bethe, “Nuclear Physics, C. Nuclear dynamics, experimental”, Rev. Mod. Phys. 9 (1937) 245, XVIII. Nuclear masses, combining data from mass spectroscopy and nuclear reaction/decay In 1950s, A. H. Wapstra created AME, to solve the problem of overdetermination

Konig et al., Nucl. Phys. A 28 (1961) 1 Ame1961, Ame1964, Ame1971, Ame1977 Ame1983, Ame1993, Ame2003, Ame2012 Series of the AME

102 Pd 102 Rh 102 Ru 1961Hi （ 6 ） 1986Be (0.8) 103 Pd 103 Rh 103 Ru 1970Bo (1.5) 2006Fi.A (0.9) 1958Ro09 764(4) 1965Mu09 760(6) 1970Pe04 762(5) 1982Oh04 769(4) 1982Ba (0.3) 2006Fi.A (0.17) 1961Hi (10) 1963Bo (10) 1983Do11 (p,n) 2332(15) 2011Go (0.36) An example Q ββ : (2.4) keV

Outline Introduction atomic mass, measurement, evaluation … Present status publication of AME2012, comparison with AME03… Some considerations about future correlation, workload… …

December 2012 issue of Chinese Physics C (IOP Science) 3711 Masses 2416 known ground state 232 known isomers 1063 extrapolated input equations in AME mass spectrometry 8534 reactions & decays AME2012 Volume 36 Number 12 December The NUBASE2012 evaluation of nuclear properties G. Audi, F.G. Kondev, M. Wang, B. Pfeiffer, X. Sun, J. Blachot, M. MacCormick 1287 The AME2012 atomic mass evaluation (I). Evaluation of input data, adjustment procedures G. Audi, M. Wang, A.H. Wapstra, F.G. Kondev, M. MacCormick, X. Xu, B. Pfeiffer 1603 The AME2012 atomic mass evaluation (II). Tables, graphs and references M. Wang, G. Audi, A.H. Wapstra, F.G. Kondev, M. MacCormick, X. Xu, B. Pfeiffer a.CSNSM-Orsay b.IMP-Lanzhou c.GSI-Darmstadt d.ANL-Argonne e.MPIK-Heildelberg f.IPN-Orsay For reprints, write to me:

 Ex, J , T 1/2 & decay modes  both ground state & Isomers (T 1/2 >100ns)  Independently evaluated data complete up-to-date credible & reliable properly referenced NUBASE2012 Poster session1- A055

Accuracy of masses

Comparison of uncertainties σ03/σ12

225 new masses Comparison of uncertainties σ03/σ12

Comparison of values ME03 – ME12 52 Ca: 1754 keV 99Y: 18 σ

shell subshell deformation Information from mass

H3H3He4He36Ar38Ar40Ar87Rb107Ag109Ag133Cs 8.71E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E Correlations Covariance matrix provided to CODATA group as request

Outline Introduction atomic mass, measurement, evaluation … Present status publication of AME2012, comparison with AME03… Some considerations about future correlation, workload… …

Injection ToF Correlation: mass measurement with a storage ring Plenary talk: ZHANG Yuhu, June 5

Amount of work: reference per year

Amount of work: reference + equation Evaluators: M. Wang, G. Audi, F.G. Kondev, M. MacCormick, X. Xu

 The AME12 & NuBase12 evaluations have been published– significant improvement compared to AME03 & NuBase03 evaluations – more nuclei & better precision.  Individual files are available for download (ascii):  If you need a hard copy – please contact me:  The AMDC coordination at IMP-Lanzhou  Next Tables are foreseen in 2016 (electronic publication only) mass.mass12 nubase.mas12 Conclusion Thank you for your attention!

Accepted by ADNDT arXiv: v4