Zobrazeno 1 - 10
of 1 177
pro vyhledávání: '"Isacker, A."'
Publikováno v:
Phys. Rev. C 108, L031305 (2023)
The empirical spectra and $E2$ decay rates in $^{110,112,114,116}$Cd are shown to be consistent with a vibrational interpretation for low-lying normal states, coexisting with a single deformed $\gamma$-soft band of intruder states. The observed devia
Externí odkaz:
http://arxiv.org/abs/2309.09285
Autor:
Van Isacker, P., Rejmund, M.
We show that the collectivity of the particle-hole wave function of low-lying octupole 3^- states in doubly magic nuclei is mainly due to the neutron-proton interaction. Both the enhanced reduced transition probability to the ground state, B(E3;3-_1
Externí odkaz:
http://arxiv.org/abs/2203.13541
Autor:
Van Isacker, P., Macchiavelli, A. O.
We present expressions for the matrix elements of the spin--spin operator $\vec S_{\rm n}\cdot\vec S_{\rm p}$ in a variety of coupling schemes. These results are then applied to calculate the expectation value $\langle\vec S_{\rm n}\cdot\vec S_{\rm p
Externí odkaz:
http://arxiv.org/abs/2105.07267
Elliott's SU(3) model is at the basis of the shell-model description of rotational motion in atomic nuclei. We demonstrate that SU(3) symmetry can be realized in a truncated shell-model space if constructed in terms of a sufficient number of collecti
Externí odkaz:
http://arxiv.org/abs/2101.11274
Autor:
Valiente-Dobón, J. J., Gottardo, A., Benzoni, G., Gadea, A., Lunardi, S., Algora, A., de Angelis, G., Bazzacco, D., Benlliure, J., Boutachkov, P., Bracco, A., Bruce, A. M., Camera, F., Casarejos, E., Cortés, M. L., Crespi, F. C. L., Corsi, A., Domingo-Pardo, C., Doncel, M., Engert, T., Geissel, H., Gerl, J., Goel, N., Górska, M., Grebosz, J., Gregor, E., Habermann, T., Klupp, S., Kojouharov, I., Kurz, N., Lenzi, S. M., Leoni, S., Mandal, S., Menegazzo, R., Mengoni, D., Million, B., Morales, A. I., Napoli, D. R., Naqvi, F., Nociforo, C., Pfutzner, M., Pietri, S., Podolyak, Zs., Prochazka, A., Recchia, F., Regan, P. H., Rudolph, D., Sahin, E., Scha_ner, H., Sharma, A., Sitar, B., Siwal, D., Strmen, P., Szarka, I., Ur, C. A., Walker, P. M., Weick, H., Wieland, O., Wollersheim, H-J., Van Isacker, P.
The neutron-rich $^{213}$Pb isotope was produced in the fragmentation of a primary 1 GeV $A$ $^{238}$U beam, separated in FRS in mass and atomic number, and then implanted for isomer decay $\gamma$-ray spectroscopy with the RISING setup at GSI. A new
Externí odkaz:
http://arxiv.org/abs/2010.14859
In the context of the sf-IBM, the interacting boson model with s and f bosons, the conditions are derived for a rotationally invariant and parity-conserving Hamiltonian with up to two-body interactions to have a minimum with tetrahedral shape in its
Externí odkaz:
http://arxiv.org/abs/2009.06264
The symmetries of the sdg-IBM, the interacting boson model with s, d and g bosons, are studied as regards the occurrence of shapes with octahedral symmetry. It is shown that no sdg-IBM Hamiltonian with a dynamical symmetry displays in its classical l
Externí odkaz:
http://arxiv.org/abs/2008.13599
Autor:
Van Isacker, P.
A solvable model is proposed for the description of octupole phonons in closed-shell nuclei, formulated in terms of shell-model par\-ticle--hole excitations. With some simple assumptions concerning single-particle energies and two-body interactions,
Externí odkaz:
http://arxiv.org/abs/2008.13579
Publikováno v:
Phys. Rev. C 98, 031302(R) (2018)
A key question concerning the spherical-vibrator attributes of states in Cadmium isotopes is addressed by means of a boson Hamiltonian encompassing U(5) partial dynamical symmetry. The U(5) symmetry is preserved in a segment of the spectrum and is br
Externí odkaz:
http://arxiv.org/abs/1810.09449
Publikováno v:
EPJ Web of Conferences 178, 05003 (2018)
The recently reported deviations of selected non-yrast states in $^{110}$Cd from the expected spherical-vibrator behaviour, is addressed by means of an Hamiltonian with U(5) partial dynamical symmetry. The latter preserves the U(5) symmetry in a segm
Externí odkaz:
http://arxiv.org/abs/1810.05917