Coulomb and nuclear excitations of Zn-70 and Ni-68 at intermediate energy

0547002 - ÚJF 2022 RIV US eng J - Článek v odborném periodiku
Calinescu, S. - Sorlin, O. - Matea, I. - Carstoiu, F. - Dao, D. D. - Nowacki, F. - De Angelis, G. - Astabatyan, R. - Bagchi, S. - Borcea, C. - Borcea, R. - Caceres, L. - Ciemala, M. - Clement, E. - Dombradi, Z. - Franchoo, S. - Gottardo, A. - Grévy, S. - Guerin, H. - Harakeh, M. N. - Harca, I. M. - Kamalou, O. - Kmiecik, M. - Krasznahorkay, A. - Krzysiek, M. - Kuti, I. - Lepailleur, A. - Lukyanov, S. - Maj, A. - Maslov, V. - Mazurek, K. - Morfouace, P. - Mrázek, Jaromír - Negoita, F. - Niikura, M. - Olivier, L. - Penionzhkevich, Y. E. - Perrot, L. - Petrone, C. - Podolyak, Z. - Rigollet, C. - Roger, T. - Rotaru, F. - Sohler, D. - Stanoiu, M. - Stefan, I. - Stuhl, L. - Thomas, J. C. - Vajta, Z. - Vandebrouck, M. - Wieland, O.
Coulomb and nuclear excitations of Zn-70 and Ni-68 at intermediate energy.
Physical Review C. Roč. 104, č. 3 (2021), č. článku 034318. ISSN 2469-9985. E-ISSN 2469-9993
Grant CEP: GA MŠMT LM2018115
Institucionální podpora: RVO:61389005
Klíčová slova: Coulomb excitation technique * excitation energy * GANIL
Obor OECD: Nuclear physics
Impakt faktor: 3.199, rok: 2021
Způsob publikování: Omezený přístup
https://doi.org/10.1103/PhysRevC.104.034318

The reduced transition probabilities B(E2, 0(g.s.)(+) -> 2(1)(+), 2(2)(+)) in (70) Zn and the full B(E2, 0(g.s.)(+) -> 2(+)) strength up to S-n = 7.79 MeV in Ni-68 have been determined at the LISE/GANIL facility using the Coulomb-excitation technique at intermediate beam energy on a Pb-208 target. The gamma rays emitted in-flight were detected with an array of 46BaF(2) crystals. The angles of the deflected nuclei were determined in order to disentangle and extract the Coulomb and nuclear contributions to the excitation of the 2(+) states. The measured B(E2, 0(g.s.)(+) -> 2(1)(+)) of 1432(124) e(2) fm(4) for Zn-70 falls in the lower part of the published values which clustered either around 1600 or above 2000 e(2) fm(4), while the B(E2, 0(g.s.)(+) -> 2(1)(+)) of 53(7) e(2) fm(4) agrees very well with the two published values. The relatively low B(E2, 0(g.s.)(+) -> 2(1)(+)) of 301(38) e(2) fm(4) for Ni-68 agrees with previous studies and confirms a local magicity at Z = 28, N = 40. Combining the results of the low-energy spectra of Ni-68 and Zn-70 and their shell-model interpretations, it is interesting to notice that four different shapes (spherical, oblate, prolate, and triaxial) are present. Finally, a summed E2 strength of only about 150 e(2) fm(4) has been found experimentally at high excitation energy, likely due to proton excitations across the Z = 28 gap. The experimental distribution of this high-energy E2 excitation agrees with shell-model calculations, but its strength is about two times weaker.
Trvalý link: http://hdl.handle.net/11104/0323366