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. Arici; 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

doi:10.1016/j.physletb.2025.139378

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. AmjadC. Appleton, T. Arici, 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

^*Corresponding author for this work

Research output: Contribution to journal › Letter › peer-review

Abstract

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.

Original language	English
Article number	139378
Number of pages	7
Journal	Physics Letters B
Volume	863
Early online date	7 Mar 2025
DOIs	https://doi.org/10.1016/j.physletb.2025.139378
Publication status	E-pub ahead of print - 7 Mar 2025

Keywords

nuclear structure
lifetime measurement
gamma-ray spectroscopy
radioactive beams

Access to Document

10.1016/j.physletb.2025.139378Licence: CC BY 4.0

2025 03 04 Zhang et al Approaching finalFinal published version, 1.4 MBLicence: CC BY 4.0

Cite this

Zhang, G., Polettini, M., Mengoni, D., Benzoni, G., Huang, Z., Górska, M., Blazhev, A., Fraile, L. M., Gargano, A., De Gregorio, G., Nowacki, F., Aggez, G., Ahmed, U., Aktas, O., Al-Aqeel, M., Alayed, B., Albers, H. M., Algora, A., Alhomaidhi, S., ... Zyriliou, A. (2025). Approaching ¹⁰⁰Sn: structural evolution in ^98,100Cd via lifetime measurements. Physics Letters B, 863, Article 139378. Advance online publication. https://doi.org/10.1016/j.physletb.2025.139378

@article{0f322ed66a574de4bd6f88b3f0b1d62d,

title = "Approaching 100Sn: structural evolution in 98,100Cd via lifetime measurements",

abstract = "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.",

keywords = "nuclear structure, lifetime measurement, gamma-ray spectroscopy, radioactive beams",

author = "G. Zhang and M. Polettini and D. Mengoni and G. Benzoni and Z. Huang and M. G{\'o}rska and A. Blazhev and L.M. Fraile and A. Gargano and {De Gregorio}, G. and F. Nowacki and G. Aggez and U. Ahmed and O. Aktas and M. Al-Aqeel and B. Alayed and H.M. Albers and A. Algora and S. Alhomaidhi and F. Amjad and C. Appleton and T. Arici and M. Armstrong and B.Q. Arn{\'e}s and A. Astier and M. Balogh and A. Banerjee and D. Bazzacco and {Benito Garc{\`i}a}, J. and S. Bottoni and P. Boutachkov and A. Bracco and A. Bruce and D. Brugnara and C. Bruno and F. Camera and B. Cederwall and M. Cicerchia and M.M.R. Chishti and A. Corsi and M.L. Cortes and D. Cox and F.C.L. Crespi and B. Das and T. Davidson and {de Angelis}, G. and T. Dickel and M. Doncel and A. Ertoprak and A. Esmaylzadeh and L. Gaffney and F. Galtarossa and E.R. Gamba and J. Garbe and D. Genna and J. Gerl and A. Goasduff and A. Gottardo and A. Gozzelino and T. Grahn and J. Ha and E. Haettner and O. Hall and L.. Harkness-brennan and H. Heggen and C. Hornung and Y. Hrabar and S.P. Hu and N. Hubbard and K.E. Ide and A. Illana and S. Jazrawi and P.R. John and J. Jolie and C. Jones and D. Joss and D. Judson and V. Karayonchev and E. Kazantseva and R. Kern and G.G. Kiss and L. Knafla and R. Kn{\"o}bel and I. Kojouharov and A. Korgul and W. Korten and P. Koseoglou and D. Kostyleva and T. Kurtukian-Nieto and G. Kosir and N. Kurz and I. Kuti and M. Labiche and S.M. Lenzi and S. Leoni and G.-S. Li and Z. Liu and {Llanos Exp{\'o}sito}, M. and R. Lozeva and J.B. Lu and M. Luoma and G. Mantovani and T. Marchi and M. Mazzocco and R. Menegazzo and T.J. Mertzimekis and M. Mikolajczuk and B. Million and A.K. Mistry and I. Mukha and E. Nacher and D.R. Napoli and {Nara Singh}, B.S. and S.E.A. Orrigo and R.D. Page and P. Papadakis and G. Pasqualato and J. Pellumaj and S. Pelonis and {Per{\'e}z Vidal}, R.M. and C.M. Petrache and J. Petrovic and N. Pietralla and S. Pietri and S. Pigliapoco and Zs. Podoly{\'a}k and C. Porzio and A. Raggio and F. Recchia and P.H. Regan and J.M. R{\'e}gis and P. Reiter and K. Rezynkina and E. Rocco and {Rodriguez Murias}, J. and H. R{\"o}sch and P. Roy and B. Rubio and M. Rudigier and P. Ruotsalainen and E. Sahin and L.G. Sarmiento and M.-M. Satrazani and H. Schaffner and Ch. Scheidenberger and L. Sexton and A. Sharma and M. Siciliano and J. Simpson and J. Smallcombe and P. S{\"o}derstr{\"o}m and D. Sohler and A. Sood and F. Soramel and B.-H. Sun and H.B. Sun and A. Sveiczer and N. Szegedi and Y.K. Tanaka and J.J. Valiente-Dob{\'o}n and P. Vasileiou and J. Vesic and {von Tresckow}, M. and L. Waring and H. Watanabe and H. Weick and V. Werner and J. Wiederhold and O. Wieland and K. Wimmer and H.-J. Wollersheim and P. Woods and J. Wu and A. Yaneva and I. Zanon and J. Zhao and H.Q. Zhang and G.L. Zhang and K.K. Zheng and L.H. Zhu and R. Zidarova and S. Ziliani and A. Zyriliou",

year = "2025",

month = mar,

day = "7",

doi = "10.1016/j.physletb.2025.139378",

language = "English",

volume = "863",

journal = "Physics Letters B",

issn = "0370-2693",

publisher = "Elsevier B.V.",

}

Zhang, G, Polettini, M, Mengoni, D, Benzoni, G, Huang, Z, Górska, M, Blazhev, A, Fraile, LM, Gargano, A, De Gregorio, G, Nowacki, F, Aggez, G, Ahmed, U, Aktas, O, Al-Aqeel, M, Alayed, B, Albers, HM, Algora, A, Alhomaidhi, S, Amjad, F, Appleton, C, Arici, T, Armstrong, M, Arnés, BQ, Astier, A, Balogh, M, Banerjee, A, Bazzacco, D, Benito Garcìa, J, Bottoni, S, Boutachkov, P, Bracco, A, Bruce, A, Brugnara, D, Bruno, C, Camera, F, Cederwall, B, Cicerchia, M, Chishti, MMR, Corsi, A, Cortes, ML, Cox, D, Crespi, FCL, Das, B, Davidson, T, de Angelis, G, Dickel, T, Doncel, M, Ertoprak, A, Esmaylzadeh, A, Gaffney, L, Galtarossa, F, Gamba, ER, Garbe, J, Genna, D, Gerl, J, Goasduff, A, Gottardo, A, Gozzelino, A, Grahn, T, Ha, J, Haettner, E, Hall, O, Harkness-brennan, L, Heggen, H, Hornung, C, Hrabar, Y, Hu, SP, Hubbard, N, Ide, KE, Illana, A, Jazrawi, S, John, PR, Jolie, J, Jones, C, Joss, D, Judson, D, Karayonchev, V, Kazantseva, E, Kern, R, Kiss, GG, Knafla, L, Knöbel, R, Kojouharov, I, Korgul, A, Korten, W, Koseoglou, P, Kostyleva, D, Kurtukian-Nieto, T, Kosir, G, Kurz, N, Kuti, I, Labiche, M, Lenzi, SM, Leoni, S, Li, G-S, Liu, Z, Llanos Expósito, M, Lozeva, R, Lu, JB, Luoma, M, Mantovani, G, Marchi, T, Mazzocco, M, Menegazzo, R, Mertzimekis, TJ, Mikolajczuk, M, Million, B, Mistry, AK, Mukha, I, Nacher, E, Napoli, DR, Nara Singh, BS, Orrigo, SEA, Page, RD, Papadakis, P, Pasqualato, G, Pellumaj, J, Pelonis, S, Peréz Vidal, RM, Petrache, CM, Petrovic, J, Pietralla, N, Pietri, S, Pigliapoco, S, Podolyák, Z, Porzio, C, Raggio, A, Recchia, F, Regan, PH, Régis, JM, Reiter, P, Rezynkina, K, Rocco, E, Rodriguez Murias, J, Rösch, H, Roy, P, Rubio, B, Rudigier, M, Ruotsalainen, P, Sahin, E, Sarmiento, LG, Satrazani, M-M, Schaffner, H, Scheidenberger, C, Sexton, L, Sharma, A, Siciliano, M, Simpson, J, Smallcombe, J, Söderström, P, Sohler, D, Sood, A, Soramel, F, Sun, B-H, Sun, HB, Sveiczer, A, Szegedi, N, Tanaka, YK, Valiente-Dobón, JJ, Vasileiou, P, Vesic, J, von Tresckow, M, Waring, L, Watanabe, H, Weick, H, Werner, V, Wiederhold, J, Wieland, O, Wimmer, K, Wollersheim, H-J, Woods, P, Wu, J, Yaneva, A, Zanon, I, Zhao, J, Zhang, HQ, Zhang, GL, Zheng, KK, Zhu, LH, Zidarova, R, Ziliani, S & Zyriliou, A 2025, 'Approaching ¹⁰⁰Sn: structural evolution in ^98,100Cd via lifetime measurements', Physics Letters B, vol. 863, 139378. https://doi.org/10.1016/j.physletb.2025.139378

TY - JOUR

T1 - Approaching 100Sn

T2 - structural evolution in 98,100Cd via lifetime measurements

AU - Zhang, G.

AU - Polettini, M.

AU - Mengoni, D.

AU - Benzoni, G.

AU - Huang, Z.

AU - Górska, M.

AU - Blazhev, A.

AU - Fraile, L.M.

AU - Gargano, A.

AU - De Gregorio, G.

AU - Nowacki, F.

AU - Aggez, G.

AU - Ahmed, U.

AU - Aktas, O.

AU - Al-Aqeel, M.

AU - Alayed, B.

AU - Albers, H.M.

AU - Algora, A.

AU - Alhomaidhi, S.

AU - Amjad, F.

AU - Appleton, C.

AU - Arici, T.

AU - Armstrong, M.

AU - Arnés, B.Q.

AU - Astier, A.

AU - Balogh, M.

AU - Banerjee, A.

AU - Bazzacco, D.

AU - Benito Garcìa, J.

AU - Bottoni, S.

AU - Boutachkov, P.

AU - Bracco, A.

AU - Bruce, A.

AU - Brugnara, D.

AU - Bruno, C.

AU - Camera, F.

AU - Cederwall, B.

AU - Cicerchia, M.

AU - Chishti, M.M.R.

AU - Corsi, A.

AU - Cortes, M.L.

AU - Cox, D.

AU - Crespi, F.C.L.

AU - Das, B.

AU - Davidson, T.

AU - de Angelis, G.

AU - Dickel, T.

AU - Doncel, M.

AU - Ertoprak, A.

AU - Esmaylzadeh, A.

AU - Gaffney, L.

AU - Galtarossa, F.

AU - Gamba, E.R.

AU - Garbe, J.

AU - Genna, D.

AU - Gerl, J.

AU - Goasduff, A.

AU - Gottardo, A.

AU - Gozzelino, A.

AU - Grahn, T.

AU - Ha, J.

AU - Haettner, E.

AU - Hall, O.

AU - Harkness-brennan, L..

AU - Heggen, H.

AU - Hornung, C.

AU - Hrabar, Y.

AU - Hu, S.P.

AU - Hubbard, N.

AU - Ide, K.E.

AU - Illana, A.

AU - Jazrawi, S.

AU - John, P.R.

AU - Jolie, J.

AU - Jones, C.

AU - Joss, D.

AU - Judson, D.

AU - Karayonchev, V.

AU - Kazantseva, E.

AU - Kern, R.

AU - Kiss, G.G.

AU - Knafla, L.

AU - Knöbel, R.

AU - Kojouharov, I.

AU - Korgul, A.

AU - Korten, W.

AU - Koseoglou, P.

AU - Kostyleva, D.

AU - Kurtukian-Nieto, T.

AU - Kosir, G.

AU - Kurz, N.

AU - Kuti, I.

AU - Labiche, M.

AU - Lenzi, S.M.

AU - Leoni, S.

AU - Li, G.-S.

AU - Liu, Z.

AU - Llanos Expósito, M.

AU - Lozeva, R.

AU - Lu, J.B.

AU - Luoma, M.

AU - Mantovani, G.

AU - Marchi, T.

AU - Mazzocco, M.

AU - Menegazzo, R.

AU - Mertzimekis, T.J.

AU - Mikolajczuk, M.

AU - Million, B.

AU - Mistry, A.K.

AU - Mukha, I.

AU - Nacher, E.

AU - Napoli, D.R.

AU - Nara Singh, B.S.

AU - Orrigo, S.E.A.

AU - Page, R.D.

AU - Papadakis, P.

AU - Pasqualato, G.

AU - Pellumaj, J.

AU - Pelonis, S.

AU - Peréz Vidal, R.M.

AU - Petrache, C.M.

AU - Petrovic, J.

AU - Pietralla, N.

AU - Pietri, S.

AU - Pigliapoco, S.

AU - Podolyák, Zs.

AU - Porzio, C.

AU - Raggio, A.

AU - Recchia, F.

AU - Regan, P.H.

AU - Régis, J.M.

AU - Reiter, P.

AU - Rezynkina, K.

AU - Rocco, E.

AU - Rodriguez Murias, J.

AU - Rösch, H.

AU - Roy, P.

AU - Rubio, B.

AU - Rudigier, M.

AU - Ruotsalainen, P.

AU - Sahin, E.

AU - Sarmiento, L.G.

AU - Satrazani, M.-M.

AU - Schaffner, H.

AU - Scheidenberger, Ch.

AU - Sexton, L.

AU - Sharma, A.

AU - Siciliano, M.

AU - Simpson, J.

AU - Smallcombe, J.

AU - Söderström, P.

AU - Sohler, D.

AU - Sood, A.

AU - Soramel, F.

AU - Sun, B.-H.

AU - Sun, H.B.

AU - Sveiczer, A.

AU - Szegedi, N.

AU - Tanaka, Y.K.

AU - Valiente-Dobón, J.J.

AU - Vasileiou, P.

AU - Vesic, J.

AU - von Tresckow, M.

AU - Waring, L.

AU - Watanabe, H.

AU - Weick, H.

AU - Werner, V.

AU - Wiederhold, J.

AU - Wieland, O.

AU - Wimmer, K.

AU - Wollersheim, H.-J.

AU - Woods, P.

AU - Wu, J.

AU - Yaneva, A.

AU - Zanon, I.

AU - Zhao, J.

AU - Zhang, H.Q.

AU - Zhang, G.L.

AU - Zheng, K.K.

AU - Zhu, L.H.

AU - Zidarova, R.

AU - Ziliani, S.

AU - Zyriliou, A.

PY - 2025/3/7

Y1 - 2025/3/7

N2 - 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.

AB - 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.

KW - nuclear structure

KW - lifetime measurement

KW - gamma-ray spectroscopy

KW - radioactive beams

U2 - 10.1016/j.physletb.2025.139378

DO - 10.1016/j.physletb.2025.139378

M3 - Letter

SN - 0370-2693

VL - 863

JO - Physics Letters B

JF - Physics Letters B

M1 - 139378

ER -