Present Status of AME and NUBASE Meng WANG CSNSM, Orsay, France IMP,Lanzhou,China April 6, 2011, Vienna.

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Presentation transcript:

Present Status of AME and NUBASE Meng WANG CSNSM, Orsay, France IMP,Lanzhou,China April 6, 2011, Vienna

List of AME and NUBASE A.H. Wapstra, Physica 21 (1955) ; J.R. Huizenga, Physica 21 (1955) 410 F. Everling, L.A. König, J.H.E. Mattauch, A.H. Wapstra, Nucl. Phys. 18 (1960) 529 L.A. König, J.H.E. Mattauch, A.H. Wapstra, Nucl. Phys. 31 (1962) 18 J.H.E. Mattauch, W. Thiele, A.H. Wapstra, Nucl. Phys. A67 (1965) A.H. Wapstra & K. Bos, At. Data Nucl. Data Tables 19 (1977) 175 A.H. Wapstra, G. Audi & R. Hoekstra, Nucl. Phys. A432 (1985) 185 G. Audi & A.H. Wapstra, Nucl. Phys. A 565 (1993) 66 C. Borcea, G. Audi, A.H. Wapstra & P. Favaron, Nucl. Phys. A 565 (1993) 158 G. Audi, A.H. Wapstra & M. Dedieu, Nucl. Phys. A 565 (1993) 193 G. Audi & A.H. Wapstra, Nucl. Phys. A 595 (1995) 409 G. Audi, O. Bersillon, J. Blachot & A.H. Wapstra, Nucl. Phys. A 624 (1997) 1 G. Audi, O. Bersillon, J. Blachot & A.H. Wapstra, Nucl. Phys. A 729 (2003) 3 A.H. Wapstra, G. Audi & C. Thibault, Nucl. Phys. A 729 (2003) 129 G. Audi, A.H. Wapstra & C. Thibault, Nucl. Phys. A 729 (2003) 337 Science 20 June 1958:

Coordinator CSNSM-Orsay : Georges Audi Contributors IMP-Lanzhou : Meng Wang, Xing Xu (Ame + programing) CSNSM-Orsay : Jean Blachot (Nubase), Xun Sun (program for Nubase) GSI-Darmstadt : Berndt Pfeiffer (Ame) ANL-Argone : Filip Kondev (Nubase + Ame) all labs welcome : 20% to 100% FTE two times one week at CSNSM-Orsay

Horizontal Evaluation

Mass measurement: inertial mass energy Relative Measurement

The AME2003 A.H. Wapstra, G. Audi, C. Thibault, Nucl. Phys. A 729 (2003) 129

The Atomic Mass Evaluation Experimental data Data Evaluation Treatment of Data – adjusted masses Least Squares Method Flow of Information Consistency of Data Regularity of the Mass Surface – estimated unknown masses From S2n - S2p - Qα -... From difference with a smooth function

Example 1

Example 2

3597 NUCLEI ACCEPTED : degreecounts Primaries in 1554 Equations with 4005 Coefficients Statistics

Consistency of Data: Example 1

In AME2003, 168Yb-168Er = 1420(4) keV Example 2

Correlations of output masses

Peter J. Mohr,† Barry N. Taylor,‡ and David B. Newell REVIEWS OF MODERN PHYSICS, VOLUME 80, APRIL–JUNE 2008 CODATA recommended values of the fundamental physical constants: 2006* Correlations of input data 3H (* )3He (* ) statistical relativistic11 Ion Number11 q/a7.7 contaminant11 others11 reference1.8 Relative uncertainties Sz. Nagy et al., Europhys. Lett. 74(3), H3H 3 He 3H3H He

Ame’ experimental data 4943 used 2228 gs masses 203 isomers Ame’ experimental data 5092 used 2341 gs masses 220 isomers Precision of Q-values and masses

Change in the predicted abundances when keeping the same stellar parameters (neutron density n_n, temperature and process duration). The experimental masses from AME are superimposed on the FRDM mass model [1997Möller]: AME2003 masses (black line) and AME2010 (red line). Crosses and error bars are for the observed abundances in the solar system [2003Lodders]. The data are normalized to the A=130 observed abundance. Impact to astrophysics

The Nubase evaluation of Nuclear and Decay Properties Ground state Isomeric states, > 100 ns Masses T 1/2 J π Decay modes and intensities

146 Tm

Discovery of Highly Excited Long-Lived Isomers in Neutron-Rich Hafnium and Tantalum Isotopes through Direct Mass Measurements Reed et al., PRL 105, (2010)

Weighing excited nuclear states with a Penning trap mass spectrometer C. Weber et al., Phys. Lett. A 347 (2005) 81.

Neutron number N Q value