☆ 4.8 Article

Direct Mapping of Nuclear Shell Effects in the Heaviest Elements

SCIENCE (2012)

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SCIENCE

卷 337, 期 6099, 页码 1207-1210

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AMER ASSOC ADVANCEMENT SCIENCE

DOI: 10.1126/science.1225636

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Multidisciplinary Sciences

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Helmholtz-Institut Mainz
GSI Helmholtzzentrum fur Schwerionenforschung GmbH
German Federal Ministry of Education and Research (BMBF)
Max-Planck Society
Russian Minobrnauki
ExtreMe Matter Institute (EMMI)

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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.

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First application of the phase-imaging ion-cyclotron resonance technique at TRIGA-Trap

S. Chenmarev, Sz Nagy, J. J. W. van de Laar, K. Blaum, M. Block, Ch. E. Duellmann

Summary: The phase-imaging ion cyclotron resonance technique (PI-ICR) has been implemented at TRIGA-Trap to perform mass measurements on stable Pb isotopes. This technique offers higher mass-resolving power, allows for detecting contaminant ions, and helps in adjusting the trapping potential and aligning the trap symmetry axis with respect to the magnetic field axis. It is a non-scanning technique that is more sensitive than the previously used time-of-flight ion-cyclotron-resonance (ToF-ICR) technique.

EUROPEAN PHYSICAL JOURNAL A (2023)

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Proceedings Paper Physics, Multidisciplinary

FAST-TIMING MEASUREMENT IN 96Pd: IMPROVED ACCURACY FOR THE LIFETIME OF THE 4+1 STATE*

A. Yaneva, S. Jazrawi, B. Das, M. Mikolajczuk, M. Gorska, P. H. Regan, B. Cederwall, J. Jolie, G. Benzoni, H. M. Albers, S. Alhomaidhi, T. Arici, A. Banerjee, M. M. R. Chishti, T. Davinson, J. Gerl, O. Hall, N. Hubbard, I. Kojouharov, A. K. Mistry, M. Polettini, M. Rudigier, E. Sahin, H. Schaffner, A. Sharma, H. J. Wollersheim, P. Boutachkov, T. Dickel, E. Haettner, H. Heggen, C. . H. Hornung, R. Knoebel, D. Kostyleva, N. Kurz, N. Kuzminchuk, I. Mukha, S. Pietri, W. R. Plass, ZS. Podolyak, C. Scheidenberger, Y. K. Tanaka, J. Vesic, H. Weick, U. Ahmed, O. Aktas, A. Algora, C. Appleton, J. Benito, A. Blazhev, A. Bracco, A. Bruce, M. Brunet, R. Canavan, A. Esmaylzadeh, L. M. Fraile, G. Haefner, K. P. Hucka, P. R. John, D. Kahl, V. Karayonchev, R. Kern, G. Kosir, R. Lozeva, P. Napiralla, B. S. Nara Singh, R. D. Page, C. M. Petrache, N. Pietralla, J. -M. Regis, H. Roesch, P. Ruotsalainen, V. Sanchez-Temble, L. Sexton, R. Shearman, M. Si, V. Werner, J. Wiederhold, K. Wimmer, W. Witt, P. Woods, G. Zimba

Summary: Direct lifetime measurements for excited states below previously reported isomers were performed using the FATIMA fast-timing LaBr3(Ce) array via gamma-gamma coincidences. The lifetimes below the I pi = 8+ seniority isomer in the N = 50 semi-magic 96Pd nucleus were studied as a benchmark for further analysis. The results confirm the published values for the I pi = 2+ and 4+ states, with improved accuracy achieved for the 4+ state lifetime.

ACTA PHYSICA POLONICA B PROCEEDINGS SUPPLEMENT (2023)

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Article Physics, Nuclear

High-precision measurements of low-lying isomeric states in 120-124In with the JYFLTRAP double Penning trap

D. A. Nesterenko, J. Ruotsalainen, M. Stryjczyk, A. Kankainen, L. Al Ayoubi, O. Beliuskina, P. Delahaye, T. Eronen, M. Flayol, Z. Ge, W. Gins, M. Hukkanen, A. Jaries, D. Kahl, D. Kumar, S. Nikas, A. Ortiz-Cortes, H. Penttilae, D. Pitman-Weymouth, A. Raggio, M. Ramalho, M. Reponen, S. Rinta-Antila, J. Romero, A. de Roubin, P. C. Srivastava, J. Suhonen, V. Virtanen, A. Zadvornaya

Summary: Neutron-rich 120-124In isotopes were studied to explore different states and excitation energies. Experimental results were compared with theoretical calculations.

PHYSICAL REVIEW C (2023)

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