LXXV International Conference «NUCLEUS – 2025. Nuclear physics, elementary particle physics and nuclear technologies»

Low-energy spectra of nobelium isotopes: scissors mode in $^{254}$No

2 Jul 2025, 14:50

20m

70(2013) (Санкт-Петербургский Государственный Университет )

Oral Section 1. Experimental and theoretical studies of nuclei. 1. Experimental and theoretical studies of nuclei

Speaker

Maria Mardyban (Laboratory of Theoretical Physics, Joint Institute for Nuclear Research. 141980, Dubna, Moscow region, Russia; Dubna State University. 141982, Dubna, Moscow region, Russia)

Description

The description of low-energy multipole specta in isotopes $^{250-260}$No within fully self-consistent Quasiparticle-Random-Phase-Approximation (QRPA) method [1, 2] with Skyrme forces is briefly discussed [5]. The main attention is paid to nuclei $^{250,252,254}$No, where we have most of the experimental spectroscopic information [3, 4]. The QRPA description of the recent experimental data on low-energy M1 strength in $^{254}$No [6] is provided. The interplay of M1 spin-flip and orbital scissors excitations is discussed. The collectivity of the states is estimated. The interference of spin and orbital degrees of freedom is analyzed.

References:
1. P.-G. Reinhard, B. Schuetrumpf, and J. A. Maruhn, Comp. Phys. Commun. 258, 107603 (2021).
2. A. Repko, J. Kvasil, V.O. Nesterenko and P.-G. Reinhard, arXiv:1510.01248[nucl-th].
3. R.-D. Herzberg and P.T. Greenlees, Prog. Part. Nucl. Phys. 61, 674 (2008).
4. R.-D. Herzberg, arXiv:2309.10468[nucl-ex].
5. V. O. Nesterenko, M.A. Mardyban, R.V. Jolos, P.-G. Reinhard, A. Repko, A. A. Dzhioev, to be published Phys. Rev. C.
6. F.L. Bello Garrote et all, Phys. Lett. B834, 137479 (2022).