دورية أكاديمية
First Evidence of Axial Shape Asymmetry and Configuration Coexistence in $^{74}$Zn: Suggestion for a Northern Extension of the $N=40$ Island of Inversion
| العنوان: | First Evidence of Axial Shape Asymmetry and Configuration Coexistence in $^{74}$Zn: Suggestion for a Northern Extension of the $N=40$ Island of Inversion |
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| المؤلفون: | Rocchini, M., Garrett, P.E., Zielínska, M., Lenzi, S.M., Dao, D.D., Nowacki, F., Bildstein, V., Maclean, A.D., Olaizola, B., Ahmed, Z.T., Andreoiu, C., Babu, A., Ball, G.C., Bhattacharjee, S.S., Bidaman, H., Cheng, C., Coleman, R., Dillmann, I., Garnsworthy, A.B., Gillespie, S., Griffin, C.J., Grinyer, G.F., Hackman, G., Hanley, M., Illana, A., Jones, S., Laffoley, A.T., Leach, K.G., Lubna, R.S., Mcafee, J., Natzke, C., Pannu, S., Paxman, C., Porzio, C., Radich, A.J., Rajabali, M.M., Sarazin, F., Schwarz, K., Shadrick, S., Sharma, S., Suh, J., Svensson, C.E., Yates, D., Zidar, T. |
| المساهمون: | Institut de Recherches sur les lois Fondamentales de l'Univers (IRFU), Université Paris-Saclay-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| المصدر: | Phys.Rev.Lett. ; https://hal.science/hal-04008644Test ; Phys.Rev.Lett., 2023, 130 (12), pp.122502. ⟨10.1103/PhysRevLett.130.122502⟩ |
| بيانات النشر: | HAL CCSD |
| سنة النشر: | 2023 |
| المجموعة: | HAL-IN2P3 (Institut national de physique nucléaire et de physique des particules) |
| مصطلحات موضوعية: | [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex], [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] |
| الوصف: | International audience ; The excited states of $N=44$$^{74}$Zn were investigated via $\gamma$-ray spectroscopy following $^{74}$Cu $\beta$ decay. By exploiting $\gamma$-$\gamma$ angular correlation analysis, the $2_2^+$, $3_1^+$, $0_2^+$ and $2_3^+$ states in $^{74}$Zn were firmly established. The $\gamma$-ray branching and $E2/M1$ mixing ratios for transitions de-exciting the $2_2^+$, $3_1^+$ and $2_3^+$ states were measured, allowing for the extraction of relative $B(E2)$ values. In particular, the $2_3^+ \to 0_2^+$ and $2_3^+ \to 4_1^+$ transitions were observed for the first time. The results show excellent agreement with new microscopic large-scale shell-model calculations, and are discussed in terms of underlying shapes, as well as the role of neutron excitations across the $N=40$ gap. Enhanced axial shape asymmetry (triaxiality) is suggested to characterize $^{74}$Zn in its ground state. Furthermore, an excited $K=0$ band with a significantly larger softness in its shape is identified. A shore of the $N=40$``island of inversion'' appears to manifest above $Z=26$, previously thought as its northern limit in the chart of the nuclides. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/arxiv/2302.07394; hal-04008644; https://hal.science/hal-04008644Test; ARXIV: 2302.07394; INSPIRE: 2632787 |
| DOI: | 10.1103/PhysRevLett.130.122502 |
| الإتاحة: | https://doi.org/10.1103/PhysRevLett.130.122502Test https://hal.science/hal-04008644Test |
| رقم الانضمام: | edsbas.F634049E |
| قاعدة البيانات: | BASE |
| DOI: | 10.1103/PhysRevLett.130.122502 |
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