Angular distribution of rays emitted by oriented nuclei: the case of Mo formed in the reaction Li+Y

Z. Huang; G. X. Zhang; S. P. Hu; B. Paes; E. N. Cardozo; J. L. Ferreira; M. J. Ermamatov; G. L. Zhang; J. B. Lu; M. Mazzocco; Y. F. Lv; H. Q. Zhang; H. B. Sun; D. Testov; P. R. John; J. J. Valiente-Dobón; A. Goasduff; M. Siciliano; F. Galtarossa; F. Recchia; D. Mengoni; D. Bazzacco; J. Lubian; X. B. Qin; H. M. Zhao

doi:10.1140/epja/s10050-021-00443-6

2023 Impact factor 2.6

Hadrons and Nuclei

Eur. Phys. J. A (2021) 57: 137
https://doi.org/10.1140/epja/s10050-021-00443-6

Regular Article – Experimental Physics

Angular distribution of $γ$ $\gamma$ rays emitted by oriented nuclei: the case of $^{92}$ $^{92}$ Mo formed in the reaction $^{6}$ Li+ $^{89}$ $^{89}$ Y

Z. Huang¹^,2, G. X. Zhang³^,4, S. P. Hu⁵, B. Paes⁶^,7, E. N. Cardozo⁶, J. L. Ferreira⁶, M. J. Ermamatov⁸, G. L. Zhang¹^,2^,9^h, J. B. Lu¹⁰, M. Mazzocco³^,4, Y. F. Lv¹⁵, H. Q. Zhang¹¹, H. B. Sun⁵, D. Testov³^,4, P. R. John¹², J. J. Valiente-Dobón¹², A. Goasduff³^,4, M. Siciliano¹²^,13, F. Galtarossa¹², F. Recchia³^,4, D. Mengoni³^,4, D. Bazzacco³^,4, J. Lubian⁶, X. B. Qin¹⁴ and H. M. Zhao¹⁴

¹ State Key Laboratory of Software Development Environment, Beihang University, 100191, Beijing, China
² School of Physics, Beihang University, 100191, Beijing, China
³ Dipartimento di Fisica, Universitá di Padova, 35131, Padua, Italy
⁴ Istituto Nazionale di Fisica Nucleare, Sezione di Padova, Padua, Italy
⁵ College of Physics and Energy, Shenzhen University, 518060, Shenzhen, China
⁶ Instituto de Física, Universidade Federal Fluminense, Niterói, 24210-340, Rio de Janeiro, Brazil
⁷ Laboratorio TANDAR, Comisión Nacional de Energía Atómica, Av. Gral. Paz 1499, BKNA1650, San Martín, Argentina
⁸ Institute of Nuclear Physics, Ulughbek, 100214, Tashkent, Uzbekistan
⁹ Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, School of Medicine and Engineering, Beihang University and Key Laboratory of Big Data-Based Precision Medicine (Beihang University), Ministry of Industry and Information Technology, Beihang University, 100191, Beijing, China
¹⁰ College of Physics, Jilin University, 130012, Changchun, China
¹¹ China Institute of Atomic Energy, 102413, Beijing, China
¹² Laboratori Nazionali di Legnaro, INFN, 35020, Legnaro, Italy
¹³ Irfu/CEA, Université de Paris-Saclay, 91190, Gif-sur-Yvette, France
¹⁴ X Lab, the Second Academy of CASIC, 100854, Beijing, China
¹⁵ School of Physics, Nankai University, 300071, Tianjin, China

^h zgl@buaa.edu.cn

Received: 17 December 2020
Accepted: 27 March 2021
Published online: 20 April 2021

Abstract

Gamma-ray angular distributions in oriented $^{92}$ $^{92}$ Mo produced via the $^{6}$ $^{6}$ Li+ $^{89}$ $^{89}$ Y reaction were studied in this work. The characteristic $γ$ $\gamma$ rays in $^{92}$ $^{92}$ Mo were measured by means of the GALILEO array, which is composed of 25 Compton-suppressed HPGe detectors arranged in a nearly 2 $π$ $\pi$ geometry. A detailed analysis of the spin-alignment attenuation factors ( $α_{2}$ $\alpha _2$ ) for different excited states in $^{92}$ $^{92}$ Mo was performed, by analyzing the measured angular distribution coefficients of several pure-E2 transitions. The relationship between $α_{2}$ $\alpha _2$ and the spin was established in $^{92}$ $^{92}$ Mo and the 244-keV transition between the 5 $_{1}^{-}$ $$^-_1$$ and 4 $_{1}^{+}$ $$^+_1$$ states resulted to have a E1 + M2 character with a mixing ratio ( $δ$ $\delta$ ) of $- 0 . 05_{- 0.06}^{+ 0.05}$ $-0.05^{+0.05}_{-0.06}$ , consistent with shell model calculations.