Speaker
Description
B. Gongora,$^{1}$ P.~Aguilera,$^1$ G.~Andreetta,$^2$ F.~Angelini,$^2$ M.~Balogh,$^2$ J.~Benito,$^2$ G.~Benzoni,$^3$ S.~Bottoni,$^3$ D.~Brugnara,$^{4}$ G.~de Angelis,$^2$ S.~Carollo,$^1$ G.~Corbari,$^3$ A.~Ertoprak,$^{5}$ R.~Escudeiro,$^{6}$ C.~Fransen,$^{7}$ A.~Gadea,$^8$ F.~Galtarossa,$^1$ D.~Genna,$^3$ A.~Giaz,$^3$ A.~Goasduff,$^1$ A.~Gottardo,$^1$ J.~Ha,$^{1}$ S.M.~Lenzi,$^1$ A.~Illana,$^9$ R.~Illicachi,$^8$ J.~Ljungvall,$^{10}$ M.~Luciani,$^3$ T.~Marchi,$^2$ N.~Marchini,$^11$ R.~Menegazzo,$^1$ D.~Mengoni,$^1$ T.~Mijatovic,$^{12}$ B.~Million,$^3$ G.~Montagnoli,$^1$ D.R.~Napoli,$^2$ R.~Nicol\'as del \'Alamo,$^1$ J.~Pellumaj,$^2$ R.M.~P\'erez-Vidal,$^8$ S.~Pigliapoco,$^1$ E.~Pilotto,$^1$ M.~Polettini,$^4$ F.~Recchia,$^1$ K.~Rezynkina$^1$ M.~Rocchini,$^{10}$ M.~Sedl\'ak,$^2$ D.~Stramaccioni,$^4$ J.J.~Valiente Dob\'on,$^8$ I.~Zanon,$^{6}$ L.~Zago,$^{2,3}$ G.~Zhang,$^{13}$, and F.~Zeng,$^2$
$^{1}$ Dipartimento di Fisica and INFN, Sezione di Padova, Padova, Italy
$^{2}$ INFN, Laboratori Nazionali di Legnaro, Legnaro, Italy
$^{3}$ Dipartimento di Fisica and INFN, Sezione di Milano, Milano, Italy
$^{4}$ GSI Helmholtzzentrum f\"ur Schwerionenforschung, Germany
$^{5}$ Argonne National Laboratory, Argonne (IL), USA
$^{6}$ Stockholm University, Sweden
$^{7}$ Institute for Nuclear Physics University of Cologne, Germany
$^{8}$ IFIC, CSIC-University of Valencia, Spain
$^{9}$ Grupo de F\'isica Nuclear IPARCOS, Universidad Complutense de Madrid, Spain
$^{10}$ IJCLab, IN2P3/CNRS, Universit\'e Paris-Saclay, Orsay, France
$^{11}$ INFN Sezione di Firenze, Firenze, Italy
$^{12}$ Ruder Bo\v skov\'ic Institute, Zagreb
$^{13}$ Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University, China
In the frame of shape evolution, Ge isotopes represent a challenge due to the rapid change in the shape configuration in terms of the neutron number. A triaxial configuration has been observed in the even-A $^{74-78}$Ge isotopes \cite{ref:1,ref:2,ref:3,ref:4,ref:5}. In the region of the isotopes $^{80-84}$Ge, a peculiar phenomenon is predicted by beyond-mean-field calculations \cite{ref:6}, a spherical configuration for the magic $N = 50$ and a rapid onset to prolate deformation in $^{80}$Ge, as well as in $^{84}$Ge. Three experiments were performed to determine the $B(E2;0^{+}_1 \rightarrow 2^{+}_1)$ in $^{80}$Ge \cite{ref:7,ref:8,ref:9}, with values that differ up to for a 66\%, and the study of the spectroscopy quadrupole moment $Q_{s}(2^{+}_{1})$ performed at ReA3 \cite{ref:9} was not conclusive, since the error estimation of the measurement did not allow discriminating among different theoretical approximations (jj44b, JUN45, 5DCH, and Symmetric Rotor).
In the present letter of intention, we propose to perform lifetime measurements for the first time of the 4$^+_1$, 2$^+_2$, and 2$^+_1$ states in $^{80}$Ge using the Recoil Distance Doppler Shift (RDDS) technique to study the deformation. The population of the states of interest will be achieved via the multinucleon transfer reaction $^{82}$Se($^{18}$O,$^{20}$Ne)$^{80}$Ge, used in the past \cite{ref:10}. For this purpose, a tantalum oxide target will be irradiated with a $^{82}$Se beam. The particle identification will be performed using the PRISMA spectrometer. Due to the presence of the 8$^+$ isomer state (2.95 ns) and the expected lifetime of the 4$^{+}$ ($\lt$10 ps), RDDS technique after a multinucleon transfer reaction arises as one of the best options to carry out the study of the lifetime of the states of interest.
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[2] S. Mukhopadhyay, et al., Phys. Rev. C 95, 014327 (2017).
[3] Y. Toh, et al., Phys. Rev. C 87, 041304(R) (2013).
[4] A. D. Ayangeakaa, et al., Phys. Rev. Lett. 123, 102501 (2019).
[5] A. M. Forney, et al., Phys. Rev. Lett. 120, 212501 (2018).
[6] K. Nomura, R. Rodríguez-Guzmán, and L. M. Robledo, Phys. Rev. C 95, 064310 (2017).
[7] E. Padilla-Rodal, et al., Phys. Rev. Lett. 94, 122501 (2005).
[8] H. Iwasaki, et al. , Phys. Rev. C 78, 021304(R) (2008).
[9] D. Rhodes, et al., Phys. Rev. C 105, 024325 (2022).
[10] C. A. Wiedner, et al., Nuclear Physics A411 (1983).