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Atomic Physics at Accelerators: Mass Spectrometry

Proceedings of the APAC 2000, held in Cargèse, France, 19–23 September 2000

  • Conference proceedings
  • © 2001

Overview

Editors:
  1. David Lunney

    1. CSNSM-IN2P3-Université de Paris Sud, Orsay, France

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  2. Georges Audi

    1. CSNSM-IN2P3-Université de Paris Sud, Orsay, France

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  3. H.-Jürgen Kluge

    1. GSI, Darmstadt, Germany

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Table of contents (64 papers)

  1. Front Matter

    Pages i-6
    Download chapter PDF

  2. Tutorial on aspects of atomic masses (in honor of the 78th birthday of Aaldert Wapstra)

    1. The Evaluation of Atomic Masses

      • Georges Audi
      Pages 7-34

    2. Experimental Overview of Mass Measurements

      • Alinka Lépine-Szily
      Pages 35-57

    3. The Quest for a Microscopic Nuclear Mass Formula

      • J. M. Pearson
      Pages 59-74

    4. Effects of QED and Beyond from the Atomic Binding Energy

      • G. Soff, I. Bednyakov, T. Beier, F. Erler, I. A. Goidenko, U. D. Jentschura et al.
      Pages 75-103

    5. Nuclear Masses and the r- and p-Processes of Nucleosynthesis

      • S. Goriely
      Pages 105-114

    6. Standard-Model Tests with Superallowed β-Decay: An Important Application of Very Precise Mass Measurements

      • J. C. Hardy, I. S. Towner
      Pages 115-126

    7. Memories of Mass Determinations

      • A. H. Wapstra
      Pages 127-131

  3. Mass measurements and nuclear structure

    1. Masses and Proton Separation Energies Obtained from Q α and Q p Measurements

      • C. N. Davids, P. J. Woods, J. C. Batchelder, C. R. Bingham, D. J. Blumenthal, L. T. Brown et al.
      Pages 133-139

    2. Anomalies in the α-Decay Energies and Half-Lives of Neutron-Deficient Po Isotopes

      • M. Huyse, A. Andreyev, K. van de Vel, P. Van Duppen, R. Wyss
      Pages 141-146

    3. Shape Coexistence and the N = 28 Shell Closure Far from Stability

      • F. Sarazin, H. Savajols, W. Mittig, F. Nowacki, N. A. Orr, Z. Ren et al.
      Pages 147-152

    4. Decay Experiments on N ~ Z nuclei: The role of Masses, Q Values and Separation Energies

      • E. Roeckl
      Pages 153-161

  4. Mass measurements for metrology

    1. Ultra-Precise Mass Measurements Using the UW-PTMS

      • Robert S. Van Dyck Jr., Steven L. Zafonte, Paul B. Schwinberg
      Pages 163-175

    2. Precise Measurements of the Masses of Cs, Rb and Na — A New Route to the Fine Structure Constant

      • Simon Rainville, Michael P. Bradley, James V. Porto, James K. Thompson, David E. Pritchard
      Pages 177-187

    3. Prompt (n, γ) Mass Measurements for the AVOGADRO Project

      • Annette Paul, Stefan Röttger, Andreas Zimbal, Uwe Keyser
      Pages 189-194

    4. Precision Measurement of the Charged Pion Mass by High Resolution X-Ray Spectroscopy

      • G. L. Borchert, B. Manil, D. Anagnostopoulos, J. P. Egger, D. Gotta, M. Hennebach et al.
      Pages 195-207

    5. A Possible New Value for the Electron Mass from g-Factor Measurements on Hydrogen-Like Ions

      • G. Werth, H. Häffner, H.-J. Kluge, W. Quint, T. Valenzuela, J. Verdu
      Pages 209-213

  5. On-line ion trap mass measurement programs

    1. Mass Measurements on Short-Lived Nuclides with ISOLTRAP

      • G. Bollen, F. Ames, G. Audi, D. Beck, J. Dilling, O. Engels et al.
      Pages 215-222

    2. The Canadian Penning Trap Spectrometer at Argonne

      • G. Savard, R. C. Barber, C. Boudreau, F. Buchinger, J. Caggiano, J. Clark et al.
      Pages 223-230

    3. Recent Progress with the SMILETRAP Penning Mass Spectrometer

      • Tomas Fritioff, Conny Carlberg, Guilhem Douysset, Reinhold Schuch, Ingmar Bergström
      Pages 231-244
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Keywords

About this book

The search for examples of proton radioactivity has resulted in the discovery of a large number of proton emitters in the region 50 < Z < 84 [1]. Many of these proton emitters and their daughters are also a-emitters, and in some cases the a-decay chain from the daughter terminates on a nuclide closer to stability whose mass excess is known. This opens up the possibility of using a-and proton-decay Q-values to determine the mass excesses of a large group of nuclei connected by particle decay. The Q-values are derived from the measured kinetic energies of the emitted protons or a-particles. Where the decay chains are not connected to nuclei with known mass excesses, proton separation energies can be measured in some cases and derived in others. For the a-decay ofthe parent nucleus (Z, A) to the daughter (Z - 2, A - 4), the energy and momentum relations used to convert between Q-value, mass (M) and mass excess (ME) are: M(4He)E", (1) M(Z - 2, A - 4)Erecoil, (2) Q", E", + Erecoi\, ME(Z, A) Q", + ME(Z - 2, A - 4) + ME(4He). (3) In practice, one uses M(4He) ~ 4 and M(Z - 2, A - 4) (A - 4), so that Equation (3) becomes ME(Z, A) = E", (_A_) + ME(Z - 2, A - 4) + ME(4He). (4) A -4 Similarly, for protons, we have ME(Z, A) = Ep(_A_) +ME(Z - 1, A-I) +ME(lH).

Editors and Affiliations

  • CSNSM-IN2P3-Université de Paris Sud, Orsay, France

    David Lunney, Georges Audi

  • GSI, Darmstadt, Germany

    H.-Jürgen Kluge

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