Mixed configurations and intertwined quantum phase transitions in odd-mass nuclei
نویسندگان
چکیده
We introduce a new Bose-Fermi framework for studying spectral properties and quantum phase transitions (QPTs) in odd-mass nuclei, the presence of configuration mixing. A detailed analysis Nb isotopes discloses effects an abrupt crossing states normal intruder configurations (Type II QPT), accompanied by gradual evolution from spherical- to deformed-core shapes within I QPT). The pronounced both types QPTs demonstrates, first time, occurrence intertwined nuclei.
منابع مشابه
Quantum Shape-Phase Transitions in Finite Nuclei
Quantum phase transitions are structural changes occurring at zero temperature as a function of a coupling constant and driven by quantum fluctuations. An example is the phase transition between different shapes of nuclei for which the equilibrium deformation plays the role of an order parameter. A proper description of such phase transitions necessitates the inclusion of correlation effects be...
متن کاملQuasi-Deuteron Configurations in odd-odd N=Z nuclei
The isovector M1 transitions between low-lying T=1 and T=0 states in oddodd N=Z nuclei are analyzed. Simple analytical expressions for M1 transition strengths are derived within a single-j-shell approximation for both j = l+1/2 and j = l − 1/2 cases. The large B(M1) values for the j = l + 1/2 case are attributed to quasi-deuteron configurations. The B(M1) values for the j = l − 1/2 case are fou...
متن کاملPhonons and Phase Transitions in Finite Nuclei
The nature and evolution of collectivity and coherence in nuclei is one of the most fundamental issues in nuclear structure and its evolution with N and Z. Despite many experiments, the nature of nuclear vibrational modes in deformed nuclei and the nature of nuclear phase/shape transitions are not at all understood. We discuss new experiments on phonon and multi-phonon states in the rare earth ...
متن کاملContinuous Quantum Phase Transitions
A quantum system can undergo a continuous phase transition at the absolute zero of temperature as some parameter entering its Hamiltonian is varied. These transitions are particularly interesting for, in contrast to their classical finite temperature counterparts, their dynamic and static critical behaviors are intimately intertwined. We show that considerable insight is gained by considering t...
متن کاملQuantum Phase Transitions
whereM is a real, symmetric, positive-definite matrix (i.e. all eigenvalues are positive). This identity can be easily established by changing variables of integration to a basis in which M is diagonal. We will use this identity to compute the free energy density F , defined by Z = exp(−V F ) where V is the volume of spacetime. In the paramagnetic phase, r > 0, the perturbative expansion for F ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review C
سال: 2022
ISSN: ['2470-0002', '2469-9985', '2469-9993']
DOI: https://doi.org/10.1103/physrevc.106.l051304