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1. Direct determination of the atomic mass difference of Re187 and Os187 for neutrino physics and cosmochronology

Author

Nesterenko, D. A., Eliseev, S., Blaum, K., Block, M., Chenmarev, S., Doerr, A., Droese, C., Filianin, P. E., Goncharov, M., Ramirez, E. Minaya, Novikov, Yu. N., Schweikhard, L., and Simon, V. V.

Subjects
Nuclear Experiment, Physics - Atomic Physics, Physics - Instrumentation and Detectors
Abstract

For the first time a direct determination of the atomic mass difference of 187Re and 187Os has been performed with the Penning-trap mass spectrometer SHIPTRAP applying the novel phase-imaging ion-cyclotron-resonance technique. The obtained value of 2492(30stat)(15sys) eV is in excellent agreement with the Q values determined indirectly with microcalorimetry and thus resolves a long-standing discrepancy with older proportional counter measurements. This is essential for the determination of the neutrino mass from the beta-decay of 187Re as planned in future microcalorimetric measurements. In addition, an accurate mass difference of 187Re and 187Os is also important for the assessment of 187Re for cosmochronology., Comment: 5 pages, 4 figures

Published
2016
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3. Direct mapping of nuclear shell effects in the heaviest elements

Author

Ramirez, E. Minaya, Ackermann, D., Blaum, K., Block, M., Droese, C., Düllmann, Ch. E., Dworschak, M., Eibach, M., Eliseev, S., Haettner, E., Herfurth, F., Heßberger, F. P., Hofmann, S., Ketelaer, J., Marx, G., Mazzocco, M., Nesterenko, D., Novikov, Yu. N., Plaß, W. R., Rodríguez, D., Scheidenberger, C., Schweikhard, L., Thirolf, P. G., and Weber, C.

Subjects
Nuclear Experiment
Abstract

Quantum-mechanical shell effects are expected to strongly enhance nuclear binding on an "island of stability" of superheavy elements. The predicted center at proton number $Z=114,120$, or $126$ and neutron number $N=184$ has been substantiated by the recent synthesis of new elements up to $Z=118$. However the location of the center and the extension of the island of stability remain vague. High-precision mass spectrometry allows the direct measurement of nuclear binding energies and thus the determination of the strength of shell effects. Here, we present such measurements for nobelium and lawrencium isotopes, which also pin down the deformed shell gap at $N=152$., Comment: 9 pages, 3 figures

Published
2014
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5. Probing the nuclide 180W for neutrinoless double-electron capture exploration

Author

Droese, C., Blaum, K., Block, M., Eliseev, S., Herfurth, F., Ramirez, E. Minaya, Novikov, Yu. N., Schweikhard, L., Shabaev, V. M., Tupitsyn, I. I., Wycech, S., Zuber, K., and Zubova, N. A.

Subjects
Nuclear Experiment
Abstract

The mass difference of the nuclides 180W and 180Hf has been measured with the Penning-trap mass spectrometer SHIPTRAP to investigate 180W as a possible candidate for the search for neutrinoless doubleelectron capture. The Q-value was measured to 143.20(27)keV. This value in combination with the calculations of the atomic electron wave functions and other parameters results in a half-life of the 0+ \rightarrow 0+ ground-state to ground-state double-electron capture transition of approximately 5\cdot10E27 years/^2.

Published
2011
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7. Direct high-precision mass spectrometry of superheavy elements with SHIPTRAP

Author

Kaleja, O., primary, Anđelić, B., additional, Bezrodnova, O., additional, Blaum, K., additional, Block, M., additional, Chenmarev, S., additional, Chhetri, P., additional, Droese, C., additional, Düllmann, Ch. E., additional, Eibach, M., additional, Eliseev, S., additional, Even, J., additional, Filianin, P., additional, Giacoppo, F., additional, Götz, S., additional, Gusev, Yu., additional, Gutiérrez, M. J., additional, Heßberger, F. P., additional, Kalantar-Nayestanaki, N., additional, van de Laar, J. J. W., additional, Laatiaoui, M., additional, Lohse, S., additional, Martynova, N., additional, Minaya Ramirez, E., additional, Mistry, A. K., additional, Murböck, T., additional, Novikov, Yu., additional, Raeder, S., additional, Rodríguez, D., additional, Schneider, F., additional, Schweikhard, L., additional, Thirolf, P. G., additional, and Yakushev, A., additional

Published
2022
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10. Direct Mapping of Nuclear Shell Effects in the Heaviest Elements

Author

Ramirez, E. Minaya, Ackermann, D., Blaum, K., Block, M., Droese, C., Düllmann, Ch. E., Dworschak, M., Eibach, M., Eliseev, S., Haettner, E., Herfurth, F., Heßberger, F. P., Hofmann, S., Ketelaer, J., Marx, G., Mazzocco, M., Nesterenko, D., Novikov, Yu. N., Plaß, W. R., Rodríguez, D., Scheidenberger, C., Schweikhard, L., Thirolf, P. G., and Weber, C.

Published
2012
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14. High-precision mass measurements of 203-207Rn and 213Ra with SHIPTRAP

Author

Droese, C., Ackermann, D., Andersson, L. -L., Blaum, K., Block, M., Dworschak, M., Eibach, M., Eliseev, S., Forsberg, U., Haettner, E., Herfurth, F., Heßberger, F. P., Hofmann, S., Ketelaer, J., Marx, G., Minaya Ramirez, E., Nesterenko, D., Novikov, Yu. N., Plaß, W. R., Rodríguez, D., Rudolph, D., Scheidenberger, C., Schweikhard, L., Stolze, S., Thirolf, P. G., and Weber, C.

Published
2013
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15. Penning trap mass measurements of transfermium elements with SHIPTRAP

Author

Block, M., Ackermann, D., Blaum, K., Droese, C., Dworschak, M., Eibach, M., Eliseev, S., Fleckenstein, T., Haettner, E., Herfurth, F., Heßberger, F. P., Hofmann, S., Ketelaer, J., Ketter, J., Kluge, H. -J., Marx, G., Mazzocco, M., Novikov, Yu. N., Plaß, W. R., Popeko, A., Rahaman, S., Rodríguez, D., Scheidenberger, C., Schweikhard, L., Thirolf, P. G., Vorobyev, G. K., and Weber, C.

Published
2010
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16. Direct mass measurements above uranium bridge the gap to the island of stability

Author

Block, M., Ackermann, D., Blaum, K., Droese, C., Dworschak, M., Eliseev, S., Fleckenstein, T., Haettner, E., Herfurth, F., Hessberger, F.P., Hofmann, S., Ketelaer, J., Ketter, J., Kluge, H.-J., Marx, G., Mazzocco, M., Novikov, Yu.N., Plass, W.R., Popeko, A., Rahaman, S., Rodriguez, D., Scheidenberger, C., Schweikhard, L., Thirolf, P.G., Vorobyev, G.K., and Weber, C.

Subjects
Transactinide elements -- Structure, Binding energy -- Research, Isotopes -- Measurement, Nuclides -- Research, Uranium -- Measurement, Environmental issues, Science and technology, Zoology and wildlife conservation
Abstract

The mass of an atom incorporates all its constituents and their interactions (1). The difference between the mass of an atom and the sum of its building blocks (the binding energy) is a manifestation of Einstein's famous relation E = [mc.sup.2]. The binding energy determines the energy available for nuclear reactions and decays (and thus the creation of elements by stellar nucleosynthesis), and holds the key to the fundamental question of how heavy the elements can be. Superheavy elements have been observed in challenging production experiments (2-4), but our present knowledge of the binding energy of these nuclides is based only on the detection of their decay products. The reconstruction from extended decay chains introduces uncertainties that render the interpretation difficult. Here we report direct mass measurements of transuranium nuclides. Located at the farthest tip of the actinide species on the proton number-neutron number diagram, these nuclides represent the gateway to the predicted island of stability. In particular, we have determined the mass values of (252-254) No (atomic number 102) with the Penning trap mass spectrometer SHIPTRAP (5). The uncertainties are of the order of 10 keV/ [c.sup.2] (representing a relative precision of 0.05 p.p.m.), despite minute production rates of less than one atom per second. Our experiments advance direct mass measurements by ten atomic numbers with no loss in accuracy, and provide reliable anchor points en route to the island of stability., Exotic nuclei at the limits of stability exhibit new features not present in stable nuclei and therefore provide deeper insight into the nature of the nuclear interaction. At the limit [...]

Published
2010
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17. Penning trap mass measurements of transfermium elements with SHIPTRAP

Author

Block, M., primary, Ackermann, D., additional, Blaum, K., additional, Droese, C., additional, Dworschak, M., additional, Eibach, M., additional, Eliseev, S., additional, Fleckenstein, T., additional, Haettner, E., additional, Herfurth, F., additional, Heßberger, F. P., additional, Hofmann, S., additional, Ketelaer, J., additional, Ketter, J., additional, Kluge, H. -J., additional, Marx, G., additional, Mazzocco, M., additional, Novikov, Yu. N., additional, Plaß, W. R., additional, Popeko, A., additional, Rahaman, S., additional, Rodríguez, D., additional, Scheidenberger, C., additional, Schweikhard, L., additional, Thirolf, P. G., additional, Vorobyev, G. K., additional, and Weber, C., additional

Published
2010
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18. Quantum-state-selective decay spectroscopy of 213Ra

Author

Lorenz, Ch, Sarmiento, L. G., Rudolph, D., Ward, D. E., Block, M, Heßberger, F. P., Ackermann, D., Andersson, L. L., Cortés, Manuel Lazo, Droese, C., Dworschak, M., Eibach, M., Forsberg, U., Golubev, P., Hoischen, R., Kojouharov, I, Khuyagbaatar, J., Nesterenko, D., Ragnarsson, I., Schaffner, H, Schweikhard, L., Stolze, S., and Wenzl, J.

Subjects
gamma-ray spectroscopy, nuclear shell model, alpha decay, Physics::Instrumentation and Detectors, Penning trap, Subatomic Physics, nuclear structure, shell model, nuclear decays, Nilsson-Strutinsky calculations, Nuclear Experiment
Abstract

An experimental scheme combining the mass resolving power of a Penning trap with contemporary decay spectroscopy has been established at GSI Darmstadt. The Universal Linear Accelerator (UNILAC) at GSI Darmstadt provided a 48Ca beam impinging on a thin 170Er target foil. Subsequent to velocity filtering of reaction products in the Separator for Heavy Ion reaction Products (SHIP), the nuclear ground state of the 5n evaporation channel 213Ra was mass-selected in SHIPTRAP, and the 213Ra ions were finally transferred into an array of silicon strip detectors surrounded by large composite germanium detectors. Based on comprehensive geant4 simulations and supported by theoretical calculations, the spectroscopic results call for a revision of the decay path of 213Ra, thereby exemplifying the potential of a combination of a mass-selective Penning trap device with a dedicated nuclear decay station and contemporary geant4 simulations. peerReviewed

Published
2017

19. Precision Measurement of the First Ionization Potential of Nobelium

Author

Chhetri, P., primary, Ackermann, D., additional, Backe, H., additional, Block, M., additional, Cheal, B., additional, Droese, C., additional, Düllmann, Ch. E., additional, Even, J., additional, Ferrer, R., additional, Giacoppo, F., additional, Götz, S., additional, Heßberger, F. P., additional, Huyse, M., additional, Kaleja, O., additional, Khuyagbaatar, J., additional, Kunz, P., additional, Laatiaoui, M., additional, Lautenschläger, F., additional, Lauth, W., additional, Lecesne, N., additional, Lens, L., additional, Minaya Ramirez, E., additional, Mistry, A. K., additional, Raeder, S., additional, Van Duppen, P., additional, Walther, Th., additional, Yakushev, A., additional, and Zhang, Z., additional

Published
2018
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20. Decay Spectroscopy of Heavy Isotopes at SHIP Using the COMPASS Focal Plane Detection Set-up

Author

Mistry, A.K., primary, Zhang, Z., additional, Heßberger, F.P., additional, Ackermann, D., additional, Andel, B., additional, Antalic, S., additional, Block, M., additional, Chhetri, P., additional, Dechery, F., additional, Droese, C., additional, Düllmann, Ch.E., additional, Giacoppo, F., additional, Hoffmann, J., additional, Kaleja, O., additional, Khuyagbaatar, J., additional, Kurz, N., additional, Laatiaoui, M., additional, Maurer, J., additional, Mošať, P., additional, Piot, J., additional, Raeder, S., additional, Vostinar, M., additional, and Yakushev, A., additional

Published
2018
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21. Recent upgrades of the SHIPTRAP setup : On the finish line towards direct mass spectroscopy of superheavy elements

Author

Giacoppo, F., Blaum, K., Block, M, Poudyal Chhetri, Meen, Düllmann, Ch. E., Droese, C., Eliseev, S., Filianin, P., Götz, Sebastian, Gusev, Y., Herfurth, F., Hessberger, F. P., Kaleja, O., Khuyagbaatar, J., Laatiaoui, M., Lautenschläger, F., Lorenz, C., Marx, G., Minaya Ramirez, E., Mistry, A. K., Novikov, Yu. N., Plass, W. R., Raeder, S., Rodríguez, D., Rudolph, D., Sarmiento, L. G., Scheidenberger, C, Schweikhard, L., Thirolf, P., Yakushev, A., Giacoppo, F., Blaum, K., Block, M, Poudyal Chhetri, Meen, Düllmann, Ch. E., Droese, C., Eliseev, S., Filianin, P., Götz, Sebastian, Gusev, Y., Herfurth, F., Hessberger, F. P., Kaleja, O., Khuyagbaatar, J., Laatiaoui, M., Lautenschläger, F., Lorenz, C., Marx, G., Minaya Ramirez, E., Mistry, A. K., Novikov, Yu. N., Plass, W. R., Raeder, S., Rodríguez, D., Rudolph, D., Sarmiento, L. G., Scheidenberger, C, Schweikhard, L., Thirolf, P., and Yakushev, A.

Abstract

With the Penning-trap mass spectrometer SHIPTRAP at GSI, Darmstadt, it is possible to investigate exotic nuclei in the region of the heaviest elements. Few years ago, challenging experiments led to the direct measurements of the masses of neutron-deficient isotopes with Z = 102; 103 around N = 152. Thanks to recent advances in cooling and ion-manipulation techniques, a major technical upgrade of the setup has been recently accomplished to boost its efficiency. At present, the gap to reach more rare and shorter-lived species at the limits of the nuclear landscape has been narrowed.

Published
2017

22. Quantum-state-selective decay spectroscopy of Ra213

Author

Lorenz, Ch., primary, Sarmiento, L. G., additional, Rudolph, D., additional, Ward, D. E., additional, Block, M., additional, Heßberger, F. P., additional, Ackermann, D., additional, Andersson, L.-L., additional, Cortés, M. L., additional, Droese, C., additional, Dworschak, M., additional, Eibach, M., additional, Forsberg, U., additional, Golubev, P., additional, Hoischen, R., additional, Kojouharov, I., additional, Khuyagbaatar, J., additional, Nesterenko, D., additional, Ragnarsson, I., additional, Schaffner, H., additional, Schweikhard, L., additional, Stolze, S., additional, and Wenzl, J., additional

Published
2017
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23. Recent Upgrades of the SHIPTRAP Setup: On the Finish Line Towards Direct Mass Spectroscopy of Superheavy Elements

Author

Giacoppo, F., primary, Blaum, K., additional, Block, M., additional, Chhetri, P., additional, Düllmann, Ch.E., additional, Droese, C., additional, Eliseev, S., additional, Filianin, P., additional, Götz, S., additional, Gusev, Y., additional, Herfurth, F., additional, Hessberger, F.P., additional, Kaleja, O., additional, Khuyagbaatar, J., additional, Laatiaoui, M., additional, Lautenschläger, F., additional, Lorenz, C., additional, Marx, G., additional, Minaya Ramirez, E., additional, Mistry, A., additional, Novikov, Yu.N., additional, Plass, W.R., additional, Raeder, S., additional, Rodríguez, D., additional, Rudolph, D., additional, Sarmiento, L.G., additional, Scheidenberger, C., additional, Schweikhard, L., additional, Thirolf, P., additional, and Yakushev, A., additional

Published
2017
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25. Direct proof of electron capture decay of $^{258}$Db

Author

Hessberger, F., Ackermann, D., Andel, B., Antalic, S., Droese, C., Even, J., Kalaninova, Z., Laatiaoui, M., Piot, J., and Vostinar, M.

Subjects
Physics
Abstract

GSI Scientific Report 2014 - GSI Report 2015-1

Published
2015

26. Direct determination of the atomic mass difference of 187Re and 187Os for neutrino physics and cosmochronology

Author

Nesterenko, D., Eliseev, S., Blaum, K., Block, M., Chenmarev, S., Dörr, A., Droese, C., Filianin, P., Goncharov, M., Minaya Ramirez, E., Novikov, Y., Schweikhard, L., and Simon, V.

Subjects
TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, Präzisionsexperimente - Abteilung Blaum
Abstract

For the first time a direct determination of the atomic mass difference of 187Re and 187Os has been performed with the Penning-trap mass spectrometer SHIPTRAP applying the novel phase-imaging ion-cyclotron-resonance technique. The obtained value of 2492(30stat)(15sys) eV is in excellent agreement with the Q values determined indirectly with microcalorimetry and thus resolves a long-standing discrepancy with older proportional counter measurements. This is essential for the determination of the neutrino mass from the β- decay of 187Re as planned in future microcalorimetric measurements. In addition, an accurate mass difference of 187Re and 187Os is also important for the assessment of 187Re for cosmochronology.

Published
2014

28. Double-β transformations in isobaric triplets with mass numbers A = 124, 130, and 136

Author

Nesterenko, D., Blaum, K., Block, M., Droese, C., Eliseev, S., Herfurth, F., Ramirez, E., Novikov, Y., Schweikhard, L., Shabaev, V., Smirnov, M., Tupitsyn, I., Zuber, K., and Zubova, N.

Subjects
TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY
Abstract

The Q values of double-electron capture in 124Xe, 130Ba, and 136Ce and double-beta decay of 124Sn and 130Te have been determined with the Penning-trap mass spectrometer SHIPTRAP with a few hundred eV uncertainty. These nuclides are members of three isobaric triplets with common daughter nuclides. The main goal of this work was to investigate the existence of the resonant enhancement of the neutrinoless double-electron-capture rates in 124Xe and 130Ba in order to assess their suitability for the search for neutrinoless double-electron capture. Based on our results, in neither of these cases is the resonance condition fulfilled.

Published
2012

29. Octupolar-Excitation Penning-Trap Mass Spectrometry for Q-Value Measurement of Double-Electron Capture in 164Er

Author

Eliseev, S., Roux, C., Blaum, K., Block, M., Droese, C., Herfurth, F., Krivoruchenko, M., Kretzschmar, M., Ramirez, E., Novikov, Y., Schweikhard, u., Shabaev, V., Simkovic, F., Tupitsyn, I., Zuber, K., and Zubova, N.

Abstract

The theory of octupolar-excitation ion-cyclotron-resonance mass spectrometry is presented which predicts an increase of up to several orders of magnitude in resolving power under certain conditions. The new method has been applied for a direct Penning-trap mass-ratio determination of the 164Er-164Dy mass doublet. 164Er is a candidate for the search for neutrinoless double-electron capture. However, the measured Qϵϵ value of 25.07(12) keV results in a half-life of 1030 years for a 1 eV Majorana-neutrino mass.

Published
2011

31. Penning trap mass measurements on nobelium isotopes

Author

Dworschak, M., Block, M., Ackermann, D., Audi, G., Blaum, K., Droese, C., Eliseev, S., Fleckenstein, T., Haettner, E., Herfurth, F., P. Hessberger, F., Hofmann, S., Ketelaer, J., Ketter, J., J. Kluge, H., Marx, G., Mazzocco, M., N. Novikov, Y., Yu, N., R. Plass, W., Popeko, A., Rahaman, S. M. Wahidur, Rodriguez, D., Scheidenberger, C., Schweikhard, L., G. Thirolf, P., K. Vorobyev, G., Wang, M., Weber, C., Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse (CSNSM), and 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)

Subjects
Nuclear reaction, Nuclear and High Energy Physics, ACCURACY, chemistry.chemical_element, Mass spectrometry, 01 natural sciences, 7. Clean energy, [SPI.MAT]Engineering Sciences [physics]/Materials, Nuclear physics, 0103 physical sciences, ELEMENTS, Nuclide, Physics::Atomic Physics, 010306 general physics, Nuclear Experiment, SPONTANEOUS FISSION, Spontaneous fission, HEAVIEST NUCLEI, Physics, SHIPTRAP, Isotope, STABILITY, 010308 nuclear & particles physics, NUCLEAR-STRUCTURE INVESTIGATIONS, SUPERHEAVY NUCLEI, Penning trap, chemistry, SPECTROMETRY, [PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci], Nobelium, HEAVY, Radioactive decay
Abstract

The Penning trap mass spectrometer SHIPTRAP at GSI Darmstadt allows accurate mass measurements of radionuclides, produced in fusion-evaporation reactions and separated by the velocity filter SHIP from the primary beam. Recently, the masses of the three nobelium isotopes {sup 252-254}No were determined. These are the first direct mass measurements of transuranium elements, which provide new anchor points in this region. The heavy nuclides were produced in cold-fusion reactions by irradiating a PbS target with a {sup 48}Ca beam, resulting in production rates of the nuclei of interest of about one atom per second. In combination with data from decay spectroscopy our results are used to perform a new atomic-mass evaluation in this region.

Published
2010

32. Direct determination of the atomic mass difference ofRe187andOs187for neutrino physics and cosmochronology

Author

Nesterenko, D. A., primary, Eliseev, S., additional, Blaum, K., additional, Block, M., additional, Chenmarev, S., additional, Dörr, A., additional, Droese, C., additional, Filianin, P. E., additional, Goncharov, M., additional, Minaya Ramirez, E., additional, Novikov, Yu. N., additional, Schweikhard, L., additional, and Simon, V. V., additional

Published
2014
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33. A phase-imaging technique for cyclotron-frequency measurements

Author

Eliseev, S., primary, Blaum, K., additional, Block, M., additional, Dörr, A., additional, Droese, C., additional, Eronen, T., additional, Goncharov, M., additional, Höcker, M., additional, Ketter, J., additional, Ramirez, E. Minaya, additional, Nesterenko, D. A., additional, Novikov, Yu. N., additional, and Schweikhard, L., additional

Published
2013
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35. Extending Penning trap mass measurements with SHIPTRAP to the heaviest elements

Author

Block, M., primary, Ackermann, D., additional, Blaum, K., additional, Droese, C., additional, Düllmann, Ch. E., additional, Eibach, M., additional, Eliseev, S., additional, Haettner, E., additional, Herfurth, F., additional, Heßberger, F. P., additional, Hofmann, S., additional, Marx, G., additional, Ramirez, E. Minaya, additional, Nesterenko, D., additional, Novikov, Yu. N., additional, Plaß, W. R., additional, Rodríguez, D., additional, Scheidenberger, C., additional, Schweikhard, L., additional, Thirolf, P. G., additional, and Weber, C., additional

Published
2013
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36. Double-βtransformations in isobaric triplets with mass numbersA=124, 130, and 136

Author

Nesterenko, D. A., primary, Blaum, K., additional, Block, M., additional, Droese, C., additional, Eliseev, S., additional, Herfurth, F., additional, Minaya Ramirez, E., additional, Novikov, Yu. N., additional, Schweikhard, L., additional, Shabaev, V. M., additional, Smirnov, M. V., additional, Tupitsyn, I. I., additional, Zuber, K., additional, and Zubova, N. A., additional

Published
2012
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37. Octupolar-Excitation Penning-Trap Mass Spectrometry forQ-Value Measurement of Double-Electron Capture inEr164

Author

Eliseev, S., primary, Roux, C., additional, Blaum, K., additional, Block, M., additional, Droese, C., additional, Herfurth, F., additional, Kretzschmar, M., additional, Krivoruchenko, M. I., additional, Minaya Ramirez, E., additional, Novikov, Yu. N., additional, Schweikhard, L., additional, Shabaev, V. M., additional, Šimkovic, F., additional, Tupitsyn, I. I., additional, Zuber, K., additional, and Zubova, N. A., additional

Published
2011
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39. Multiple-resonance phenomenon in neutrinoless double-electron capture

Author

Eliseev, S., primary, Goncharov, M., additional, Blaum, K., additional, Block, M., additional, Droese, C., additional, Herfurth, F., additional, Minaya Ramirez, E., additional, Novikov, Yu. N., additional, Schweikhard, L., additional, Shabaev, V. M., additional, Tupitsyn, I. I., additional, Zuber, K., additional, and Zubova, N. A., additional

Published
2011
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40. Mass measurements on stable nuclides in the rare-earth region with the Penning-trap mass spectrometer TRIGA-TRAP

Author

Ketelaer, J., primary, Audi, G., additional, Beyer, T., additional, Blaum, K., additional, Block, M., additional, Cakirli, R. B., additional, Casten, R. F., additional, Droese, C., additional, Dworschak, M., additional, Eberhardt, K., additional, Eibach, M., additional, Herfurth, F., additional, Minaya Ramirez, E., additional, Nagy, Sz., additional, Neidherr, D., additional, Nörtershäuser, W., additional, Smorra, C., additional, and Wang, M., additional

Published
2011
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42. Resonant Enhancement of Neutrinoless Double-Electron Capture inGd152

Author

Eliseev, S., primary, Roux, C., additional, Blaum, K., additional, Block, M., additional, Droese, C., additional, Herfurth, F., additional, Kluge, H.-J., additional, Krivoruchenko, M. I., additional, Novikov, Yu. N., additional, Minaya Ramirez, E., additional, Schweikhard, L., additional, Shabaev, V. M., additional, Šimkovic, F., additional, Tupitsyn, I. I., additional, Zuber, K., additional, and Zubova, N. A., additional

Published
2011
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43. Penning trap mass measurements on nobelium isotopes

Author

Dworschak, M., primary, Block, M., additional, Ackermann, D., additional, Audi, G., additional, Blaum, K., additional, Droese, C., additional, Eliseev, S., additional, Fleckenstein, T., additional, Haettner, E., additional, Herfurth, F., additional, Heßberger, F. P., additional, Hofmann, S., additional, Ketelaer, J., additional, Ketter, J., additional, Kluge, H.-J., additional, Marx, G., additional, Mazzocco, M., additional, Novikov, Yu. N., additional, Plaß, W. R., additional, Popeko, A., additional, Rahaman, S., additional, Rodríguez, D., additional, Scheidenberger, C., additional, Schweikhard, L., additional, Thirolf, P. G., additional, Vorobyev, G. K., additional, Wang, M., additional, and Weber, C., additional

Published
2010
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44. Extending Penning trap mass measurements with SHIPTRAP to the heaviest elements.

Author

Block, M., Ackermann, D., Blaum, K., Droese, C., Düllmann, Ch. E., Eibach, M., Eliseev, S., Haettner, E., Herfurth, F., Heßberger, F. P., Hofmann, S., Marx, G., Ramirez, E. Minaya, Nesterenko, D., Novikov, Yu. N., Plaß, W. R., Rodríguez, D., Scheidenberger, C., Schweikhard, L., and Thirolf, P. G.

Subjects
PENNING trap mass spectrometry, RADIOISOTOPES, NUCLEAR structure, STABILITY (Mechanics), MASS measurement, NUCLIDES, BINDING energy, NOBELIUM, NUCLEAR shell theory
Abstract

Penning-trap mass spectrometry of radionuclides provides accurate mass values and absolute binding energies. Such mass measurements are sensitive indicators of the nuclear structure evolution far away from stability. Recently, direct mass measurements have been extended to the heavy elements nobelium (Z=102) and lawrencium (Z=103) with the Penning-trap mass spectrometer SHIPTRAP. The results probe nuclear shell effects at N=152. New developments will pave the way to access even heavier nuclides. [ABSTRACT FROM AUTHOR]

Published
2013
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45. Probing the nuclide 180W for neutrinoless double-electron capture exploration

Author

Droese, C., Blaum, K., Block, M., Eliseev, S., Herfurth, F., Minaya Ramirez, E., Novikov, Yu.N., Schweikhard, L., Shabaev, V.M., Tupitsyn, I.I., Wycech, S., Zuber, K., and Zubova, N.A.

Subjects
*NUCLIDES, *ELECTRON capture, *MASS spectrometers, *NEUTRINOS, *ATOMIC mass, *WAVE equation
Abstract

Abstract: The mass difference of the nuclides 180W and 180Hf has been measured with the Penning-trap mass spectrometer SHIPTRAP to investigate 180W as a possible candidate for the search for neutrinoless double-electron capture. The -value was measured to 143.20(27) keV. This value in combination with the calculations of the atomic electron wave functions and other parameters results in a half-life of the ground-state to ground-state double-electron capture transition of approximately . [Copyright &y& Elsevier]

Published
2012
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46. Direct determination of the atomic mass difference of 187Re and 187Os for neutrino physics and cosmochronology.

Author

Nesterenko, D. A., Eliseev, S., Blaum, K., Block, M., Chenmarev, S., Dörr, A., Droese, C., Filianin, P. E., Goncharov, M., Ramirez, E. Minaya, Novikov, Yu. N., Schweikhard, L., and Simon, V. V.

Subjects
*NUCLEAR physics, *RHENIUM, *ATOMIC mass, *NEUTRINOS, *COSMOCHRONOLOGY
Abstract

For the first time a direct determination of the atomic mass difference of 187Re and 187Os has been performed with the Penning-trap mass spectrometer SHIPTRAP applying the novel phase-imaging ion-cyclotron-resonance technique. The obtained value of 2492(30stat)(15sys) eV is in excellent agreement with the Q values determined indirectly with microcalorimetry and thus resolves a long-standing discrepancy with older proportional counter measurements. This is essential for the determination of the neutrino mass from the β- decay of 187Re as planned in future microcalorimetric measurements. In addition, an accurate mass difference of 187Re and 187Os is also important for the assessment of 187Re for cosmochronology. [ABSTRACT FROM AUTHOR]

Published
2014
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47. Double-β transformations in isobaric triplets with mass numbers A = 124, 130, and 136.

Author

Nesterenko, D. A., Blaum, K., Block, M., Droese, C., Eliseev, S., Herfurth, F., Ramirez, E. Minaya, Novikov, Yu. N., Schweikhard, L., Shabaev, V. M., Smirnov, M. V., Tupitsyn, I. I., Zuber, K., and Zubova, N. A.

Subjects
*ISOBARIC spin, *PHASE transitions, *ELECTRON capture, *DOUBLE beta decay, *PENNING trap mass spectrometry, *NUCLIDES
Abstract

The Q values of double-electron capture in 124Xe, 130Ba, and 136Ce and double-beta decay of 124Sn and 130Te have been determined with the Penning-trap mass spectrometer SHIPTRAP with a few hundred eV uncertainty. These nuclides are members of three isobaric triplets with common daughter nuclides. The main goal of this work was to investigate the existence of the resonant enhancement of the neutrinoless double-electron-capture rates in 124Xe and 130Ba in order to assess their suitability for the search for neutrinoless double-electron capture. Based on our results, in neither of these cases is the resonance condition fulfilled. [ABSTRACT FROM AUTHOR]

Published
2012
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48. Octupolar-Excitation Penning-Trap Mass Spectrometry for Q-Value Measurement of Double-Electron Capture in 164Er.

Author

Eliseev, S., Roux, C., Blaum, K., Block, M., Droese, C., Herfurth, F., Kretzschmar, M., Krivoruchenko, M. I., Ramirez, E. Minaya, Novikov, Yu. N., Schweikhard, L., Shabaev, V. M., Šimkovic, F., Tupitsyn, I. I., Zuber, K., and Zubova, N. A.

Subjects
*CYCLOTRONS, *PARTICLE accelerators, *SYNCHROCYCLOTRONS, *MASS spectrometry, *NUCLEAR spectroscopy
Abstract

The theory of octupolar-excitation ion-cyclotron-resonance mass spectrometry is presented which predicts an increase of up to several orders of magnitude in resolving power under certain conditions. The new method has been applied for a direct Penning-trap mass-ratio determination of the 164Er-164Dy mass doublet. 164Er is a candidate for the search for neutrinoless double-electron capture. However, the measured Q∈∈, value of 25.07(12) keV results in a half-life of 1030 years for a 1 eV Majorana-neutrino mass. [ABSTRACT FROM AUTHOR]

Published
2011
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49. Probing the nuclides 102Pd, 106Cd, and 144Sm resonant neutrinoless double-electron capture.

Author

Goncharov, M., Blaum, K., Block, M., Droese, C., Eliseev, S., Herfurth, F., Ramirez, E. Minaya, Novikov, Yu. N., Schweikhard, L., and Zuber, K.

Subjects
*ELECTRON capture, *NUCLEAR physics, *MASS spectrometry, *NUCLEAR spectroscopy, *NUCLIDES
Abstract

The Q values for double-electron capture in 102Pd, 106Cd, and 144Sm have been measured by Penning-trap mass spectrometry. The results exclude at present all three nuclides from the list of suitable candidates for a search for resonant neutrinoless double-electron capture. [ABSTRACT FROM AUTHOR]

Published
2011
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50. Qvalues for neutrinoless double-electron capture in 96Ru, 162Er, and 168Yb.

Author

Eliseev, S., Nesterenko, D., Blaum, K., Block, M., Droese, C., Herfurth, F., Ramirez, E. Minaya, Novikov, Yu. N., Schweikhard, L., and Zuber, K.

Subjects
*PENNING trap mass spectrometry, *ELECTRONS, *NUCLIDES, *ELECTRON capture, *NEUTRINOS, *NUCLEAR physics
Abstract

The Q values of the neutrinoless double-electron capture transitions in 96Ru, 162Er, and 168Yb have been determined by Penning-trap mass-ratio measurements. Based on our new high-precision results for the Q values, neither of these transitions shows a resonant enhancement of the capture rate. At present, this excludes these nuclides from the list of suitable candidates in the search for neutrinoless double-electron capture. [ABSTRACT FROM AUTHOR]

Published
2011
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