Speaker
Description
The study of single particle and bulk properties of the neutron-rich nuclei constrains fundamental issues of Nuclear physics like limits of existence of the quantum many body system ( atomic nucleus) and equation of state of neutron-rich matter etc [1-7]. This information has also important impact in understanding cosmic phenomena, like neutron star, nucleosynthesis, evolution of star etc...[1,6,7]. The state of art of Coulomb breakup of the neutron-rich nuclei has been used to explore those properties [1-9]. The unambiguous information on detailed components of the ground-state wave-function along with quantum numbers of the valence neutron of the nuclei obtained from the measurement of threshold strength along with the g-ray spectra following Coulomb breakup [1,3-5,9]. The shape of this threshold strength is a finger-print of the quantum numbers of the valence neutron. We investigated the ground-state properties of neutron-rich Na, Mg, Al nuclei around, island of inversion, N ~20 using this method at GSI, Darmstadt. Very clear evidences have been observed for melting and merging of long cherished magic shell gaps at N = 20,28 [4,9]. The evanescent neutron-rich nuclei imprint their existence in stellar explosive scenarios (r-process etc.). The indirect measurements are the only possible access to the information which is a valuable input to the model for star evolution process [6]. Some valuable bulk properties of the neutron-rich nuclei like density dependent symmetry energy, neutron skins etc. [7] play a key role in understanding densest object in the universe, the neutron star. I shall discuss our experimental investigation to obtain those information.
[1] Ushasi Datta et al., https://arxiv.org/abs/1810.08996
[2] A.Leistenschneider et al., Phys. Rev. Lett.86, 5442 (2001). P.Adrich et al., Phys. Rev. Lett.95 132501, (2005)
[3] U.DattaPramanik et al, Phy. Lett. B 551, 63 (2003).
[4] S. Chakraborty et al., Phy. Rev. C 96, 034301 (2017).
[5] A.Rahaman et al, J.Phys. G 44 ,045101 (2017).
[6] Ushasi Datta Pramanik , Prog. in part. Nucl. Phys.59, 183 ( 2007).
[7] ] A. Klimkiewicz et al., Phys. Rev. C76, 051503 (2007). D.M.Rossi et al., Phys.Rev.Lett.111, 242503 (2013)
[8] C.A.Bertulani and G.Baur, Physics Report 163, 299 (1988).
[9] Ushasi Datta et al., Phys. Rev. C 94, 034304 (2016).
