Czok, U.

Pfeiffer, B.

Scheidenberger, C.

Venkataramaniah, K.

GSI Repository

Atomic Mass CompilationsB. Pfeiffer1,2, K. Venkataramaniah3, U. Czok1, and C. Scheidenberger2,11II. Phys. Inst., Justus-Liebig-Universita¨t, Gießen; 2GSI Helmholtzzentrum fu¨r Schwerionenforschung, Darmstadt,Germany; 3Sri Sathya Sai Institute of Higher Learning, Prasanthinilayam, IndiaThe “Atomic Mass Compilation 2012” has been pre-pared in close collaboration of the II. Phys. Inst., Univer-sita¨t Gießen, the GSI and the Sri Sathya Sai Institute ofHigher Learning, India, and is now accessible at “AtomicData and Nuclear Data Tables” [1].Compilations of (elemental) atomic masses have been es-tablished ever since the beginning of the 19 th century [2].One of the most recent ones has been published in theLandoldt-Bo¨rnstein New Series [3], but is rarely availablein scientific libraries. Therefore we started a new compila-tion to be published in a peer-reviewed journal accessiblein most scientific institutions.German precursorsFrom 1921 to 1945, the “Deutsche Atomgewichts-Kommission” (see, e.g. [4]) published annual reviews onrecent experiments on atomic masses and compilationsof elemental and isotopic masses [5]. Since 1932, thesereports were prepared by the “Kaiser-Wilhelm-Institut fu¨rChemie” [6]. Gradually the preponderant experimentalmethods shifted from chemical to physical techniques.Mass spectroscopy was represented at the Kaiser-Wilhelm-Institut by the team of J. Mattauch. [One of the post-docswas Heinz Ewald, later the first director of the II. Phys.Inst. in Gießen 1. He was involved in the construction ofinstruments like LOHENGRIN and OSTIS in Grenoble andSHIP at GSI, installations which yielded many contribu-tions to atomic mass determinations.]After WWII, the study of atomic masses was continued atthe Max-Planck-Institut fu¨r Chemie. The mass compilationpublished in 1949 [7] included also the recent americanresults on nuclear properties, which were made availableto Mattauch by G.T. Seaborg as preprint of the “Table ofIsotopes” [8].In 1960, the group of Mattauch in collaboration with A.H.Wapstra published the first edition of the “Atomic MassEvaluation” [9]. After the retirement of Mattauch in 1965,the work was directed first by Wapstra and later on byG. Audi. The last edition [10] had been prepared by aninternational collaboration including the GSI and the II.Physik. Inst.1Two of the authors, U.C.and B.P., were admitted to the institute byProf. Ewald.Follow-up work in preparationThe information contained in the mass tables can be dis-played in plots of the binding energy (or mass) versus Z,N or A. Any plots of derivatives of the binding energies(meaning a specified difference between the binding ener-gies of two nearby nuclides) show a smooth behaviour andhave in addition the advantage of displaying much smallervariations. In [11], two representative examples for suchgraphs of double β-decay energies and two-neutron sepa-ration energies, respectively, are displayed, clearly showingthe trends in the mass surface.Thus, dependable estimates of unknown , poorly known orquestionable masses can be obtained. It is foreseen to usesuch graphs for more dependable extrapolations of massestoward the drip lines and also to test theoretical models.References[1] B. Pfeiffer, K. Venkataramaniah, U. Czok, C. Scheiden-berger, Atomic Data Nuclear Data Tables 100 (2014) 403[2] J. Dalton, Memoirs and Proceedings of the Manchester Lit-erary and Philosophical Society, Manchester, 6 (1805)[3] Z.N. Soroko and S.I. Sukhoruchkin, Landolt-Bo¨rnsteinNew Series I/22A,B (2009) Nuclear Bindung Energies andAtomic Masses: Nuclei with Z=1 - 54 and Z=55 - 100;ISBN 978-3-540-69944-6 and ISBN 978-3-540-70608-3[4] O. Hahn, Die Naturwissenschaften 10/43 (1922) 934[5] “Atomgewichtstabellen fu¨r das Jahr 1921”, in Ber. d.deutsch. chem. Ges. 54 (1921) A. 181.All reports can be found on the webpage of the EuropeanJournal of Inorganic Chemistry:http://onlinelibrary.wiley.com/journal/10.1002/(ISSN)1099-0682c[6] O. Hahn, Berichte d. D. Chem. Gesellschaft 65A (1932) 1[7] J. Mattauch und A. Flammersfeld, Isotopenbericht, Sonder-heft der Zeitschrift fu¨r Naturforschung, Tu¨bingen (1949)[8] G.T. Seaborg and I. Perlman, Rev. Mod. Phys. 20 (1948)585[9] F. Everling, L.A. Ko¨nig, J.H.E. Mattauch, A.H. Wapstra,Nucl. Phys. 18 (1960) 529[10] G. Audi et al., Chinese Physics C36 (2012) 1157; G. Audiet al., Chinese Physics C36 (2012) 1287; M. Wang et al.,Chinese Physics C36 (2012) 1603[11] B.Pfeiffer, Shreesha Rao D.S., K. Rajasinha, K. Venkatara-maniah, U. Czok and C. Scheidenberger, Proceedings ofDAE Symp. on Nucl. Phys. 58 (2013) 174GSI SCIENTIFIC REPORT 2013 NUSTAR-FRS-14doi:10.15120/GR-2014-1-NUSTAR-FRS-14 111 NUSTAR-FRS-14 GSI SCIENTIFIC REPORT 2013112 doi:10.15120/GR-2014-1-NUSTAR-FRS-14

Atomic Mass Compilations

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Atomic Mass Compilations

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