Physics Letters B (Apr 2025)

Approaching 100Sn: Structural evolution in 98,100Cd via lifetime measurements

  • G. Zhang,
  • M. Polettini,
  • D. Mengoni,
  • G. Benzoni,
  • Z. Huang,
  • M. Górska,
  • A. Blazhev,
  • L.M. Fraile,
  • A. Gargano,
  • G. De Gregorio,
  • F. Nowacki,
  • G. Aggez,
  • U. Ahmed,
  • O. Aktas,
  • M. Al-Aqeel,
  • B. Alayed,
  • H.M. Albers,
  • A. Algora,
  • S. Alhomaidhi,
  • F. Amjad,
  • C. Appleton,
  • T. Arıcı,
  • M. Armstrong,
  • B.Q. Arnés,
  • A. Astier,
  • M. Balogh,
  • A. Banerjee,
  • D. Bazzacco,
  • J. Benito Garcìa,
  • S. Bottoni,
  • P. Boutachkov,
  • A. Bracco,
  • A. Bruce,
  • D. Brugnara,
  • C. Bruno,
  • F. Camera,
  • B. Cederwall,
  • M. Cicerchia,
  • M.M.R. Chishti,
  • A. Corsi,
  • M.L. Cortes,
  • D. Cox,
  • F.C.L. Crespi,
  • B. Das,
  • T. Davidson,
  • G. de Angelis,
  • T. Dickel,
  • M. Doncel,
  • A. Ertoprak,
  • A. Esmaylzadeh,
  • L. Gaffney,
  • F. Galtarossa,
  • E.R. Gamba,
  • J. Garbe,
  • D. Genna,
  • J. Gerl,
  • A. Goasduff,
  • A. Gottardo,
  • A. Gozzelino,
  • T. Grahn,
  • J. Ha,
  • E. Haettner,
  • O. Hall,
  • L. Harkness-Brennan,
  • H. Heggen,
  • C. Hornung,
  • Y. Hrabar,
  • S.P. Hu,
  • N. Hubbard,
  • K.E. Ide,
  • A. Illana,
  • S. Jazrawi,
  • P.R. John,
  • J. Jolie,
  • C. Jones,
  • D. Joss,
  • D. Judson,
  • V. Karayonchev,
  • E. Kazantseva,
  • R. Kern,
  • G.G. Kiss,
  • L. Knafla,
  • R. Knöbel,
  • I. Kojouharov,
  • A. Korgul,
  • W. Korten,
  • P. Koseoglou,
  • D. Kostyleva,
  • T. Kurtukian-Nieto,
  • G. Kosir,
  • N. Kurz,
  • I. Kuti,
  • M. Labiche,
  • S.M. Lenzi,
  • S. Leoni,
  • G.-S. Li,
  • Z. Liu,
  • M. Llanos Expósito,
  • R. Lozeva,
  • J.B. Lu,
  • M. Luoma,
  • G. Mantovani,
  • T. Marchi,
  • M. Mazzocco,
  • R. Menegazzo,
  • T.J. Mertzimekis,
  • M. Mikolajczuk,
  • B. Million,
  • A.K. Mistry,
  • I. Mukha,
  • E. Nacher,
  • D.R. Napoli,
  • B.S. Nara Singh,
  • S.E.A. Orrigo,
  • R.D. Page,
  • P. Papadakis,
  • G. Pasqualato,
  • J. Pellumaj,
  • S. Pelonis,
  • R.M. Peréz Vidal,
  • C.M. Petrache,
  • J. Petrovic,
  • N. Pietralla,
  • S. Pietri,
  • S. Pigliapoco,
  • Zs. Podolyák,
  • C. Porzio,
  • A. Raggio,
  • F. Recchia,
  • P.H. Regan,
  • J.M. Régis,
  • P. Reiter,
  • K. Rezynkina,
  • E. Rocco,
  • J. Rodriguez Murias,
  • H. Rösch,
  • P. Roy,
  • B. Rubio,
  • M. Rudigier,
  • P. Ruotsalainen,
  • E. Sahin,
  • L.G. Sarmiento,
  • M.-M. Satrazani,
  • H. Schaffner,
  • Ch. Scheidenberger,
  • L. Sexton,
  • A. Sharma,
  • M. Siciliano,
  • J. Simpson,
  • J. Smallcombe,
  • P. Söderström,
  • D. Sohler,
  • A. Sood,
  • F. Soramel,
  • B.-H. Sun,
  • H.B. Sun,
  • A. Sveiczer,
  • N. Szegedi,
  • Y.K. Tanaka,
  • J.J. Valiente-Dobón,
  • P. Vasileiou,
  • J. Vesic,
  • M. von Tresckow,
  • L. Waring,
  • H. Watanabe,
  • H. Weick,
  • V. Werner,
  • J. Wiederhold,
  • O. Wieland,
  • K. Wimmer,
  • H.-J. Wollersheim,
  • P. Woods,
  • J. Wu,
  • A. Yaneva,
  • I. Zanon,
  • J. Zhao,
  • H.Q. Zhang,
  • G.L. Zhang,
  • K.K. Zheng,
  • L.H. Zhu,
  • R. Zidarova,
  • S. Ziliani,
  • A. Zyriliou

Journal volume & issue
Vol. 863
p. 139378

Abstract

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The lifetimes of low-lying excited states below the 8+ seniority isomer were directly measured using fast timing detectors in the neutron-deficient isotopes 98,100Cd. This experiment was conducted with the DEcay SPECtroscopy (DESPEC) setup at GSI, where the ions of interest were produced via a fragmentation reaction and identified using the FRagment Separator (FRS) before being implanted in the AIDA active stopper system, and the γ rays emitted during the de-excitation of isomeric states were detected by the LaBr3 FATIMA Array. The newly deduced values for the reduced transition probabilities were compared with shell-model calculations using different interactions and effective charges. The results indicate that, while 98Cd aligns well with a seniority scheme description, in 100Cd the transition strengths among low-lying states are not fully reproduced, and the nature of these states remains an open problem within the present theoretical description. Ultimately, a key element in the description of this region, crucial for nuclear physics and astrophysics, appears to be the proton-neutron term of the nuclear effective interaction.

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