On the robustness of surface vibrational modes: case studies in the Cd region

Garrett, P. E.; Wood, John L.

doi:10.1088/0954-3899/37/6/064028

Cited by 85 publications

(69 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The model is further supported by the measurement of a small quadrupole moment, Q(2 + 1 ) = +0.05(12) b [6], and the collective B(E2) values [7,8]. However, the spherical vibrator model has faced challenges in recent years a e-mail: evitts@triumf.ca e.g., Garrett et al have suggested the breakdown of vibrational excitations in the Cd isotopes [9,10]. In the Cd case it seems that mixing with multi-quasiparticle intruder configurations are likely to play a significant role in the development of apparent collectivity in the ground-state structure.…”

Section: Introductionmentioning

confidence: 94%

Electric Monopole Transition Strengths in⁶²Ni

et al. 2016

View full text Add to dashboard Cite

Abstract. Excited states in 62 Ni were populated with a (p, p') reaction using the 14UD Pelletron accelerator at the Australian National University. Electric monopole transition strengths, ρ 2 (E0), were measured through simultaneous detection of the internal conversion electrons and γ rays emitted from the de-excitation of populated states, using the Super-e spectrometer coupled with a germanium detector. The strength of the 0 + 2 to 0 + 1 transition has been measured to be 77 +23 −34 × 10 −3 and agrees with previously reported values. Upper limits have been placed on the 0 + 3 to 0 + 1 and 0 + 3 to 0 + 2 transitions. The measured ρ 2 (E0) value of the 2 + 2 to 2 + 1 transition in 62 Ni has been measured for the first time and found to be one of the largest ρ 2 (E0) values measured to date in nuclei heavier than Ca. The low-lying states of 62 Ni have previously been classified as one-and two-phonon vibrational states based on level energies. The measured electric quadrupole transition strengths are consistent with this interpretation. However as electric monopole transitions are forbidden between states which differ by one phonon number, the simple harmonic quadrupole vibrational picture is not sufficient to explain the large ρ 2 (E0) value for the 2 + 2 to 2 + 1 transition.

show abstract

Section: Introductionmentioning

confidence: 94%

Electric Monopole Transition Strengths in⁶²Ni

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The spectral and electromagnetic evolution revealed in these isotopes permits a systematic study of their nuclear structure properties, which also have an impact on nuclear astrophysics [3][4][5][6][7][8][9]. A recent study of the I π = 11/2 − isomers in Cd isotopes [10] indicates that the quadrupole and magnetic moments (denoted by Q and µ, respectively) both vary roughly as linear functions of neutron number.…”

Section: Introductionmentioning

confidence: 99%

Phase change nearN=70in the wave function of theIπ=11/2−isomers along the cadmium-isotope chain

2015

View full text Add to dashboard Cite

Phase change near N = 70 in the wave function of the I π = 11/2 − isomers along the cadmium-isotope chain The electromagnetic features of the 11/2 − isomers in the 111−127 Cd isotopes are reproduced by numerically optimized shell-model wave-functions. A sudden phase change of the wave functions at N = 70 is identified and further confirmed by the evolution of B(E2, 7/2This phase change gives rise to different linear relations for the Q and µ values with N < 70 and N > 70, as needed to reproduce the experimental data. The particle-hole transformation properties for h 11/2 neutrons in a well-isolated subshell involving degenerate s 1/2 , d 3/2 , d 5/2 and h 11/2 orbits is suggested as a possible explanation for this phase change.

show abstract

“…Several candidates in the 48 Cd and 46 Pd region have been proposed as good examples of spherical quadrupole shape vibrators. However, a recent program of systematic study of even-mass stable Cd isotopes concluded that these nuclei are very poorly described by vibrational models [1][2][3]. This conclusion was based upon lifetime measurements of excited states in 110,112,114 Cd [4][5][6] which allowed the determination of B(E2)s that were found to be inconsistent with model calculations.…”

Section: Introductionmentioning

confidence: 99%