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23 results on '"Neidherr, D."'

1. Examining the N=28 shell closure through high-precision mass measurements of 46–48Ar

Author

Mougeot, M., Atanasov, D., Barbieri, C., Blaum, K., Breitenfeld, M., De Roubin, A., Duguet, T., George, S., Herfurth, F., Herlert, A., Holt, J.D., Karthein, J., Lunney, D., Manea, V., Navrátil, P., Neidherr, D., Rosenbusch, M., Schweikhard, L., Schwenk, A., Somà, V., Welker, A., Wienholtz, F., Wolf, R.N., Zuber, K., Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), and Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay

Subjects
[PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th], nucl-th, Nuclear Theory, FOS: Physical sciences, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Structure, nucl-ex, Nuclear Theory (nucl-th), Nuclear Physics - Theory, Physics::Atomic and Molecular Clusters, Nuclear Physics - Experiment, Nuclear Experiment (nucl-ex), Präzisionsexperimente - Abteilung Blaum, Nuclear Experiment
Abstract

The strength of the $N$ = 28 magic number in neutron-rich argon isotopes is examined through high-precision mass measurements of $^{46-48}$Ar, performed with the ISOLTRAP mass spectrometer at ISOLDE/CERN. The new mass values are up to 90 times more precise than previous measurements. While they suggest the persistence of the $N$ = 28 shell closure for argon, we show that this conclusion has to be nuanced in light of the wealth of spectroscopic data and theoretical investigations performed with the \emph{SDPF-U} phenomenological shell model interaction. Our results are also compared with \emph{ab initio} calculations using the Valence Space In-Medium Similarity Renormalization Group and the Self-Consistent Green's Function approaches. Both calculations provide a very good account of mass systematics at and around $Z$ = 18 and, generally, a consistent description of the physics in this region. This combined analysis indicates that $^{46}$Ar is the transition between the closed-shell $^{48}$Ca and collective $^{44}$S., 17 pages, 14 figures

Published
2020
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2. Erratum: QEC-value determination for 21Na → 21Ne and 23Mg → 23 Na mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP at the CERN ISOLDE facility [Phys. Rev. C 100, 015502 (2019)

Author

Karthein, J., Atanasov, D., Blaum, K., Breitenfeldt, M., Bondar, V., George, S., Hayen, L., Lunney, D., Manea, V., Mougeot, M., Neidherr, D., Schweikhard, L., Severijns, N., Welker, A., Wienholtz, F., Wolf, R., and Zuber, K.

Subjects
Präzisionsexperimente - Abteilung Blaum
Published
2020

3. Hyperfine anomaly in gold and magnetic moments of Iπ=11/2− gold isomers

Author

Barzakh, A., Atanasov, D., Andreyev, A., Al Monthery, M., Althubiti, N., Andel, B., Antalic, S., Blaum, K., Cocolios, T., Cubiss, J., Duppen, P., Goodacre, T., de Roubin, A., Demidov, Y., Farooq-Smith, G., Fedorov, D., Fedosseev, V., Fink, D., Gaffney, L., Ghys, L., Harding, R., Joss, D., Herfurth, F., Huyse, M., Imai, N., Kozlov, M., Kreim, S., Lunney, D., Lynch, K., Manea, V., Marsh, B., Palenzuela, Y., Molkanov, P., Neidherr, D., Page, R., Rosenbusch, M., Rossel, R., Rothe, S., Schweikhard, L., Seliverstov, M., Sels, S., Beveren, C., Verstraelen, E., Welker, A., Wienholtz, F., Wolf, R., and Zuber, K.

Subjects
Präzisionsexperimente - Abteilung Blaum
Abstract

ispartof: Physical Review C vol:101 issue:3 pages:034308-1-034308-9 status: published

Published
2020

4. QEC-value determination for 21Na→21Ne and 23Mg→23Na mirror-nuclei decays using high-precision mass spectrometry with ISOLTRAP at ISOLDE/CERN

Author

Karthein, J., Atanasov, D., Blaum, K., Breitenfeldt, M., Bondar, V., George, S., Hayen, L., Lunney, D., Manea, V., Mougeot, M., Neidherr, D., Schweikhard, L., Severijns, N., Welker, A., Wienholtz, F., Wolf, R., and Zuber, K.

Subjects
Präzisionsexperimente - Abteilung Blaum
Abstract

We report on high-precision $Q_{\textrm{EC}}$ values of the $^{21}$Na$\rightarrow^{21}$Ne and $^{23}$Mg$\rightarrow^{23}$Na mirror $\beta$-transitions from mass measurements with ISOLTRAP at ISOLDE/CERN. A precision of $\delta m/m = 9 \cdot 10^{-10}$ and $\delta m/m = 1.5 \cdot 10^{-9}$ was reached for the masses of $^{21}$Na and $^{23}$Mg, respectively. We reduce the uncertainty of the $Q_{\textrm{EC}}$ values by a factor five, making them the most precise experimental input data for the calculation of the corrected $\mathcal{F} t$-value of these mixed Fermi/Gamow-Teller transitions. For the $^{21}$Na$\rightarrow^{21}$Ne $Q_{\textrm{EC}}$ value, a $2.3 \sigma$ deviation from the literature $Q_{\textrm{EC}}$-value was found.

Published
2019

5. Inverse odd-even staggering in nuclear charge radii and possible octupole collectivity in 217,218,219At revealed by in-source laser spectroscopy

Author

Barzakh, A. E., Cubiss, J. G., Andreyev, A. N., Seliverstov, M. D., Andel, B., Antalic, S., Ascher, P., Atanasov, D., Beck, D., Bieroifmmode nelse, J., Blaum, K., Borgmann, Ch., Breitenfeldt, M., Capponi, L., Cocolios, T. E., Day Goodacre, T., Derkx, X., De Witte, H., Elseviers, J., Fedorov, D. V., Fedosseev, V. N., Fritzsche, S., Gaffney, L. P., George, S., Ghys, L., Heßberger, F. P., Huyse, M., Imai, N., Kalaninová, Z., Kisler, D., Köster, U., Kowalska, M., Kreim, S., Lane, J. F. W., Liberati, V., Lunney, D., Lynch, K. M., Manea, V., Marsh, B. A., Mitsuoka, S., Molkanov, P. L., Nagame, Y., Neidherr, D., Nishio, K., Ota, S., Pauwels, D., Popescu, L., Radulov, D., Rapisarda, E., Revill, J. P., Rosenbusch, M., Rossel, R. E., Rothe, S., Sandhu, K., Schweikhard, L., Sels, S., Truesdale, V. L., Van Beveren, C., Van den Bergh, P., Van Duppen, P., Wakabayashi, Y., Wendt, K. D. A., Wienholtz, F., Whitmore, B. W., Wilson, G. L., Wolf, R. N., and Zuber, K.

Subjects
Physics::Atomic Physics, Präzisionsexperimente - Abteilung Blaum, Nuclear Experiment
Abstract

© 2019 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Hyperfine-structure parameters and isotope shifts for the 795-nm atomic transitions in At217,218,219 have been measured at CERN-ISOLDE, using the in-source resonance-ionization spectroscopy technique. Magnetic dipole and electric quadrupole moments, and changes in the nuclear mean-square charge radii, have been deduced. A large inverse odd-even staggering in radii, which may be associated with the presence of octupole collectivity, has been observed. Namely, the radius of the odd-odd isotope At218 has been found to be larger than the average of its even-N neighbors, At217,219. The discrepancy between the additivity-rule prediction and experimental data for the magnetic moment of At218 also supports the possible presence of octupole collectivity in the considered nuclei. ispartof: Physical Review C vol:99 issue:5 status: published

Published
2019

6. Charge radii and electromagnetic moments of $^{195--211}\mathrm{At}$

Author

Cubiss, JG, Barzakh, AE, Seliverstov, MD, Andreyev, AN, Andel, B, Antalic, S, Ascher, P, Atanasov, D, Beck, D, Bieroń, J, Blaum, K, Borgmann, C, Breitenfeldt, M, Capponi, L, Cocolios, TE, Day Goodacre, T, Derkx, X, De Witte, H, Elseviers, J, Fedorov, DV, Fedosseev, VN, Fritzsche, S, Gaffney, LP, George, S, Ghys, L, Heßberger, FP, Huyse, M, Imai, N, Kalaninová, Z, Kisler, D, Köster, U, Kowalska, M, Kreim, S, Lane, JFW, Liberati, V, Lunney, D, Lynch, KM, Manea, V, Marsh, BA, Mitsuoka, S, Molkanov, PL, Nagame, Y, Neidherr, D, Nishio, K, Ota, S, Pauwels, D, Popescu, L, Radulov, D, Rapisarda, E, Revill, JP, Rosenbusch, M, Rossel, RE, Rothe, S, Sandhu, K, Schweikhard, L, Sels, S, Truesdale, VL, Van Beveren, C, Van den Bergh, P, Wakabayashi, Y, Van Duppen, P, Wendt, KDA, Wienholtz, F, Whitmore, BW, Wilson, GL, Wolf, RN, and Zuber, K

Subjects
Nuclear Experiment
Abstract

© 2018 authors. Hyperfine-structure parameters and isotope shifts of At195-211 have been measured for the first time at CERN-ISOLDE, using the in-source resonance-ionization spectroscopy method. The hyperfine structures of isotopes were recorded using a triad of experimental techniques for monitoring the photo-ion current. The Multi-Reflection Time-of-Flight Mass Spectrometer, in connection with a high-resolution electron multiplier, was used as an ion-counting setup for isotopes that either were affected by strong isobaric contamination or possessed a long half-life; the ISOLDE Faraday cups were used for cases with high-intensity beams; and the Windmill decay station was used for short-lived, predominantly α-decaying nuclei. The electromagnetic moments and changes in the mean-square charge radii of the astatine nuclei have been extracted from the measured hyperfine-structure constants and isotope shifts. This was only made possible by dedicated state-of-the-art large-scale atomic computations of the electronic factors and the specific mass shift of atomic transitions in astatine that are needed for these extractions. By comparison with systematics, it was possible to assess the reliability of the results of these calculations and their ascribed uncertainties. A strong deviation in the ground-state mean-square charge radii of the lightest astatine isotopes, from the trend of the (spherical) lead isotopes, is interpreted as the result of an onset of deformation. This behavior bears a resemblance to the deviation observed in the isotonic polonium isotopes. Cases for shape coexistence have been identified in At197,199, for which a significant difference in the charge radii for ground (9/2-) and isomeric (1/2+) states has been observed. ispartof: Physical Review C vol:97 issue:5 status: Published online

Published
2018

7. Constraining the neutron star crust via mass measurements

Author

Althubiti, N, Ascher, P, Atanasov, D, Aymard, F, Bastin, B, Blaum, K, Beck, D, Breitenfeldt, M, Cakirli, R B, Chauveau, P, Cocolios, T E, De France, G, De Oliveira, F, Delahaye, P, Eliseev, S, Eronen, T, George, S, Gulminelli, F, Herfurth, F, Herlert, A, Kowalska, M, Kreim, S, Litvinov, Yu A, Lunney, D, MacCormick, M, Manea, V, Minaya Ramirez, E, Naimi, S, Neidherr, D, Rosenbusch, M, de Roubin, A, Savajols, H, Schweikhard, L, Welker, A, Wienholtz, F, Wolf, R N, and Zuber, K

Subjects
Detectors and Experimental Techniques
Published
2015

8. Ge and Se beam developments for constraining the neutron star crust via mass measurements

Author

Althubiti, N, Ascher, P, Atanasov, D, Aymard, F, Bastin, B, Blaum, K, Beck, D, Breitenfeldt, M, Cakirli, R B, Chauveau, P, Cocolios, T E, De France, G, De Oliveira, F, Delahaye, P, Eliseev, S, Eronen, T, George, S, Gulminelli, F, Herfurth, F, Herlert, A, Kowalska, M, Kreim, S, Litvinov, Yu A, Lunney, D, MacCormick, M, Manea, V, Minaya Ramirez, E, Naimi, S, Neidherr, D, Rosenbusch, M, de Roubin, A, Savajols, H, Schweikhard, L, Welker, A, Wienholtz, F, Wolf, R N, and Zuber, K

Subjects
Detectors and Experimental Techniques
Published
2015

9. Probing the N = 32 shell closure below the magic proton number Z = 20: Mass measurements of the exotic isotopes 52,53K

Author

Rosenbusch, M., Ascher, P., Atanasov, D., Barbieri, C., Beck, D., Blaum, K., Borgmann, Ch., Breitenfeldt, M., Cakirli, R. b., Cipollone, A., George, S., Herfurth, F., Kowalska, M., Kreim, S., Lunney, D., Manea, V., Navrátil, P., Neidherr, D., Schweikhard, L., Somà, V., Stanja, J., Wienholtz, F., Wolf, R. n., Zuber, K., Max-Planck-Institut für Kernphysik (MPIK), Max-Planck-Gesellschaft, Department of Physics, University of Surrey, Guildford, CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), TRIUMF [Vancouver], Département de Physique Nucléaire (ex SPhN) (DPHN), Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Institut f¨ur Kernphysik, Technische Universit¨at Darmstadt, 64289 Darmstadt, University of Surrey (UNIS), and Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM)

Subjects
STABILITY, NUCLEI, Nuclear Theory, shell closure, Penning trap, FOS: Physical sciences, K isotopes, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], ISOLTRAP, TRAP, Nuclear Theory (nucl-th), Physics::Atomic and Molecular Clusters, mass measurements, Nuclear Physics - Experiment, Präzisionsexperimente - Abteilung Blaum, Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

The recently confirmed neutron-shell closure at N = 32 has been investigated for the first time below the magic proton number Z = 20 with mass measurements of the exotic isotopes 52,53K, the latter being the shortest-lived nuclide investigated at the online mass spectrometer ISOLTRAP. The resulting two-neutron separation energies reveal a 3 MeV shell gap at N = 32, slightly lower than for 52Ca, highlighting the doubly-magic nature of this nuclide. Skyrme-Hartree-Fock-Boguliubov and ab initio Gorkov-Green function calculations are challenged by the new measurements but reproduce qualitatively the observed shell effect., Comment: 5 pages, 5 figures

Published
2015
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10. In-source laser spectroscopy of mercury isotopes

Author

Gaffney, Liam Paul, Day Goodacre, Thomas, Andreyev, Andrei, Seliverstov, Maxim, Althubiti, N, Andel, B, Antalic, S, Atanasov, D, Barzakh, A E, Blaum, K, Billowes, J, Cocolios, T E, Cubiss, J, Farooq-Smith, G, Fedorov, D V, Fedosseev, V N, Ferrer, R, Flanagan, K T, Ghys, L, Granados, C, Gottberg, A, Herfurth, F, Huyse, M, Jenkins, D G, Kisler, D, Kreim, S, Kron, T, Kudryavtsev, Yu, Lunney, D, Lynch, K M, Marsh, B A, Manea, V, Mendonca, T M, Molkanov, P L, Neidherr, D, Raabe, R, Ramos, J P, Raeder, S, Rapisarda, E, Rosenbusch, M, Rossel, R E, Rothe, S, Schweikhard, L, Sels, S, Stora, T, Tsekhanovich, I, Van Beveren, C, Van Duppen, P, Veinhard, M, Wadsworth, R, Welker, A, Wienholtz, F, Wendt, K, Wilson, G L, Witkins, S, Wolf, R, and Zuber, K

Subjects
Detectors and Experimental Techniques
Published
2014

11. Search for $\beta$-transitions with the lowest decay energy for a determination of the neutrino mass

Author

Eliseev, S, Althubiti, N, Ascher, P, Atanasov, D, Blaum, K, Böhm, Ch, Borgmann, Ch, Breitenfeldt, M, Cakirli, R B, Cocolios, T E, Eronen, T, Filianin, P, George, S, Goncharov, M, Herfurth, F, Herlert, A, Kisler, D, Kowalska, M, Kreim, S, Litvinov, Yu A, Lunney, D, Manea, V, Minaya Ramirez, E, Naimi, S, Neidherr, D, Novikov, Yu, Rosenbusch, M, de Roubin, A, Schweikhard, L, Wienholtz, F, Welker, A, Wolf, R N, and Zuber, K

Subjects
Detectors and Experimental Techniques
Published
2014

12. Penning-trap mass measurements with ISOLTRAP

Author

Ascher, P, Atanasov, D, Blaum, K, Boehm, Ch, Borgmann, Ch, Breitenfeldt, M, Cakirli, R B, Cocolios, T E, Eliseev, S, Eronen, T, George, S, Herfurth, F, Herlert, A, Kisler, D, Kowalska, M, Kreim, S, Litvinov, Yu A, Lunney, D, Manea, V, Minaya-Ramirez, E, Naimi, S, Neidherr, D, Rosenbusch, M, Schweikhard, L, Wienholtz, F, Welker, A, Wolf, R N, and Zuber, K

Subjects
Detectors and Experimental Techniques
Published
2014

13. High precision mass measurements of odd-odd T=1 nuclides for the study of the Isobaric Multiplet Mass Equation

Author

MacCormick, M, Ascher, P, Atanasov, D, Blaum, K, Boehm, Ch, Borgmann, Ch, Breitenfeldt, M, Cakirli, R B, Cocolios, T E, Eliseev, S, Eronen, T, George, S, Herfurth, F, Herlert, A, Kisler, D, Kowalska, M, Kreim, S, Litvinov, Yu A, Lunney, D, Manea, V, Minaya Ramirez, E, Naimi, S, Neidherr, D, Rosenbusch, M, de Roubin, A, Schweikhard, L, Welker, A, Wienholtz, F, Wolf, R N, Zuber, K, Jokinen, A, and Moore, I D

Subjects
Detectors and Experimental Techniques
Published
2014

14. Seeking the purported magic number N= 32 with high-precision mass spectrometry

Author

Kreim, S, Beck, D, Blaum, K, Bohm, Ch, Borgmann, Ch, Breitenfeldt, M, Cakirli, R B, Herfurth, F, Kowalska, M, Litvinov, Y, Lunney, D, Manea, V, Naimi, S, Neidherr, D, Rosenbusch, M, Schweikhard, L, Stanja, J, Stora, Th, Wienholtz, F, Wolf, R N, and Zuber, K

Subjects
Detectors and Experimental Techniques
Abstract

Accounting for the appearance of new magic numbers represents an exacting test for nuclear models. Binding energies o er a clear signature for the presence (or dis- appearance) of shell closures. To determine the strength of the purported N = 32 shell closure, we propose using the Penning-trap spectrometer ISOLTRAP for mass measure- ments of N = 34 isotones 58 Cr ( Z = 24), 55 Sc ( Z = 21) and 54 Ca ( Z = 20), as well as the N = 32 isotones 53 Sc and 52 Ca. We also propose measuring the mass of 60 Cr to test the shell model prediction of a new magic number at N = 34. In addition to the Penning-trap system at ISOLTRAP, we intend to use the newly commissioned multi-re ection time-of- ight mass separator, which enables direct mass measurements on nuclei with half-lives below 50 ms.

Published
2011

15. Search for new candidates for the neutrino-oriented mass determination by electron-capture

Author

Beck, D, Blaum, K, Block, M, Boehm, Ch, Borgmann, Ch, Breitenfeldt, M, Eliseev, S, Fedoseev, V, George, S, Herfurth, F, Herlert, A, Kluge, H -J, Kowalska, M, Kreim, S, Lunney, D, Manea, V, Naimi, S, Neidherr, D, Novikov, Yu N, Rosenbusch, M, Schwarz, S, Schweikhard, L, Seliverstov, M, Sokolov, A, Stanja, J, Wienholtz, F, Wolf, R N, and Zuber, K

Subjects
Detectors and Experimental Techniques
Published
2011

18. Masses of r-process waiting-point nuclides

Author

Beck, D, Blaum, K, Boehm, Ch, Borgmann, Ch, Breitenfeldt, M, Cakirli, R B, George, S, Herfurth, F, Herlert, A, Kowalska, M, Kreim, S, Lunney, D, Naimi, S, Neidherr, D, Rosenbusch, M, Schwarz, S, Schweikhard, L, Wolf, N R, and Zuber, K

Subjects
Detectors and Experimental Techniques
Published
2010

20. Masses of noble gases

Author

Lunney, D, Audi, G, Beck, D, Blaum, K, Borgmann, C, Breitenfeldt, M, George, S, Herfurth, F, Herlert, A, Kellerbauer, A G, Kowalska, M, Manaya-Ramirez, E, Naimi, S, Neidherr, D, Noah, E, Penescu, L, Rosenbusch, M, Schatz, H, Schwarz, S, Schweikhard, L, Stora, T, and Warring, U

Subjects
Detectors and Experimental Techniques
Published
2009

22. Penning trap mass measurements on (99-109)$Cd with ISOLTRAP and implications on the rp process

Author

Breitenfeldt, M., Audi, G., Beck, D., Blaum, K., George, S., Herfurth, F., Herlert, A., Kellerbauer, A., Kluge, H. -J., Kowalska, M., Lunney, D., Naimi, S., Neidherr, D., Schatz, H., Schwarz, S., Schweikhard, L., Ernst-Moritz-Arndt-Universität, CSNSM SNO, Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11)-Centre de Sciences Nucléaires et de Sciences de la Matière (CSNSM), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Helmholtz zentrum für Schwerionenforschung GmbH (GSI), European Organization for Nuclear Research (CERN), Universität Heidelberg [Heidelberg], National Supercondcting Cyclotron Laboratory (NCSL), Michigan State University [East Lansing], and Michigan State University System-Michigan State University System

Subjects
FOS: Physical sciences, 21.10.Dr, 32.10.Bi, 26.30.Ca, 27.60.+j, [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], Nuclear Experiment (nucl-ex), Nuclear Experiment
Abstract

Penning trap mass measurements on neutron-deficient Cd isotopes (99-109)Cd have been performed with the ISOLTRAP mass spectrometer at ISOLDE/CERN, all with relative mass uncertainties below 3*10^8. A new mass evaluation has been performed. The mass of 99Cd has been determined for the first time which extends the region of accurately known mass values towards the doubly magic nucleus 100Sn. The implication of the results on the reaction path of the rp process in stellar X-ray bursts is discussed. In particular, the uncertainty of the abundance and the overproduction created by the rp-process for the mass A = 99 is demonstrated by reducing the uncertainty of the proton-separation energy of 100In Sp(100In) by a factor of 2.5., Comment: 14 pages, 9 figures

Published
2009
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23. Experiments with heavy, highly charged ions - Status of the HITRAP project

Author

Herfurth, F., Barth, W., Clemente, G., Dahl, L. A., Gerhard, P., Kaiser, M., Kester, O. K., Kluge, H. -J, Krantz, C., Kotovskiy, N., Kozhuharov, C., Maier, M., Neidherr, D., Quint, W., Ratzinger, U., Reiter, A., Schempp, A., Sokolov, A., Thomas Stöhlker, Vormann, H., Vorobjev, G., Wolf, A., and Yaramishev, S.

Subjects
Physics::Accelerator Physics, Nuclear Experiment
Abstract

At the GSI accelerator complex, using the universal linear accelerator UNILAC and the syn- chrotron SIS, highly-charged ions up to U 92 + are produced by passing a 400 MeV/u beam through a gold foil stripping off all or nearly all electrons. The HITRAP facility is built to decelerate those ions to almost rest and to provide them to experiments. In a number of commissioning beam times, the deceleration in the ESR, the extraction, bunching and deceleration to 0.5 MeV/u has been shown. The remaining steps, deceleration to 6 keV/u and cooling in a cryogenic Penning trap are ongoing. Precision experiments for atomic and nuclear physics purpose are being prepared and range from laser spectroscopy on stored ions, collision experiments with complete kinematic analysis to high precision mass measurements on single highly charged ions

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