Open AccessA possible route of nuclear quantum phase transition induced by rotation
Author(s) -
Shi Zhu-yi,
Tong Hong,
Shi Zhu-Ya,
Chunmei Zhang,
Zhao Xing-Zhi,
Ni Shao-Yong
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.1329
Subject(s) - physics , quantum phase transition , excited state , boson , interacting boson model , phase transition , quantum phases , quantum mechanics , atomic physics
Based on the microscopic IBM-theory, a possible route of boson quantum phase transition induced by rotation is put forward. Once the nucleus is in a high-energy excited or high-speed rotating state, the nucleus would occupy the coexist-phase of collective superfluid phase with single-particle phase, if the energy is enough to realize the boson's breaking up and aligning in the nucleus, characterized by a more dense spectrum. If the energy is not enough, either of following two cases will happen. When the rotating state of nucleus arrives at critical rotating-frequency ωc, one case is that a higher-momentum boson may be decoupled from the `collective state' as a quantum `free boson', the other case is that the transition from a higher-momentum boson to a lower-momentum boson takes place, and the nucleus remaius in a collective state.Both cases are acompanied by the light-emission from the transition from higher excited-state to lower excited-state, and the total superfluous band energy of nuclear system is released by means of excited element, and an energy level appears in the ground-state band, which signifies a quantum phase transition. Just owing to these boson quantum phase transition, nuclear quantum phase transition could happen. Descriptions of boson phase transitions on breaking up and aligning as well as on decoupled and released photons have been united in this physical picture. As an example, this model has been expounded with the mechanism of producing 14+1, 14+2, and 14+3 states on the 100Pd nucleus.