Experimental confirmation of the alhassid-whelan arc of regularity

• Published in: Physical review letters Vol. 93; no. 13; pp. 132501.1 - 132501.4
• Main Authors: JOLIE, J, CASTEN, R. F, CEJNAR, P, HEINZE, S, MCCUTCHAN, E. A, ZAMFIR, N. V
• Format: Journal Article
• Language: English
• Published: Ridge, NY American Physical Society 24-09-2004
• Subjects: Exact sciences and technology; Models based on group theory; Nuclear physics; Nuclear structure; Nuclear-structure models and methods; Physics; Interacting boson approximation; N body system; Hamiltonians
• ISSN: 0031-9007; 1079-7114
• DOI: 10.1103/PhysRevLett.93.132501

Evidence is presented to show that a group of nuclei, spanning a range of structures, corresponds to a previously proposed isolated region of regular behavior between vibrational and rotational structures that was never before observed empirically. Nuclei predicted to show such regular spectra correspond to Hamiltonian parameters that lie amidst those giving more chaotic spectra. We identify a key observable that has a one-to-one correspondence to this arc of regularity and which therefore provides both an empirical signature for it and a clue to its underlying nature.