Characterization of Three-Phonon States in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi>C</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>110</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow><mml:mi>d</mml:mi></mml:math>

Corminboeuf, F.; Brown, T. B.; Genilloud, L.; Hannant, C. D.; Jolie, J.; Kern, J.; Warr, N.; Yates, S. W.

doi:10.1103/physrevlett.84.4060

Cited by 50 publications

(28 citation statements)

References 17 publications

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“…The 2 + 1 to ground state transition of 45 W.u. is typical of, but somewhat larger than, such transitions in vibrational nuclei in this region [15][16][17][18][19][20][21]. The B(E2) values from the triplet of 0 + , 2 + and 4 + levels around 1100 keV also resemble what is found for typical vibrational nuclei near A ∼ 100, namely a 4 + 1 → 2 + 1 transition that exhausts the majority of the two-phonon to one-phonon strength while the decays of the two-phonon candidate 2 + 2 and 0 + 2 levels are substantially weaker.…”

Section: Discussionmentioning

confidence: 99%

“…Comparison to 98 Ru on the one hand, where vibrational structure above the two phonon level seems completely destroyed, and the Cd nuclei from 110−118 Cd [15][16][17][18][19][20][21] where good candidates for three and higher phonon levels with substantial fractions of the vibrator collectivity are known, suggests that 102 Ru has an intermediate structure.…”

Section: Discussionmentioning

confidence: 99%

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102Ru: A pivotal nucleus in theA∼100region

et al. 2011

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

102Ru: A pivotal nucleus in theA∼100region

et al. 2011

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“…In addition, high-statistics data for low-intensity transitions following β + /EC , and 2480-keV (6 + 1 ) levels as members of the three-phonon quintuplet [3,18,19,23,25].…”

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confidence: 99%

Detailed spectroscopy of110Cd: Evidence for weak mixing and the emergence ofγ-soft behavior

Garrett¹,

Bangay²,

Varela³

et al. 2012

Phys. Rev. C

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A study of the β + /EC decay of 110 In into levels of 110 Cd is combined with a reanalysis of data from a previous study of 110 Cd with the (n, n ′ γ) reaction with monoenergetic neutrons. The γγ coincidences from the 110 In decay leads to many new assignments of γ rays observed in the (n, n ′ γ) reaction, permitting the observation of weak low-energy transitions, and setting stringent upper limits on unobserved decay branches. The uncertainties on many of the lifetimes from the (n, n ′ γ) reaction are significantly reduced, and limits are established for the lifetimes of levels too long for a direct measurement. The absence of enhanced transitions between the previously assigned phonon states and the deformed intruder states strongly suggests that mixing between the configurations is generally weak, refuting the strong-mixing scenario as an explanation of the decay pattern of the excited 0 + states in 110 Cd. The decay pattern of the non-intruder states is suggestive of a γ-soft rotor, or O(6) nucleus, rather than a vibrational, or U (5) pattern. The existence of a 4p − 6h proton excitation in 110 Cd is also suggested.

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Section: -P2mentioning

confidence: 99%

“…This reaction provides comprehensive spectroscopy and the ability to deduce level lifetimes in the 1 fs -1 ps range, yielding B(E2) values for low-spin, highly non-yrast states [23][24][25][26][27][28]. In the early studies of 110,112 Cd [23][24][25] with the (n, n ′ γ) reaction, the B(E2) values for the observed γ rays were in line with expectations or not deemed significant. However, later studies [26][27][28] started to reveal more serious discrepancies, particularly highlighted in 116 Cd [26] where the strong-mixing calculations failed to explain the decays of the 0 + 2 and 0 + 3 levels which has the higher energy 0 + 3 intruder band head still retaining the enhanced B(E2; 0 + → 2 + 1 ) strength, and the lower energy 0 + 2 two-phonon state possessing a suppressed B(E2) value.…”

Section: -P2mentioning

confidence: 99%

The evolving structure of the Cd isotopes

Garrett

2014

EPJ Web of Conferences

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Abstract. The even-even Cd isotopes have long been cited as one of the prime examples of vibrational behaviour, identified soon after the Bohr model was developed in the early 1950's. By the late 1970's, the presence of intruder states and shape coexistence were identified, but the underlying vibrational nature remained intact. More recently, the robustness of the multiphonon states was questioned, prompting detailed spectroscopic investigations at a number of facilities, including the use of the (n, n ′ γ) reaction and β-decay studies with modern γ-ray spectrometers. Combining results from these studies, a re-examination of the structure of the mid-shell Cd isotopes suggests that they may represent deformed γ-soft rotors rather than spherical vibrators. The early years: Cd as spherical vibratorsThe collective model of Bohr and Mottelson [1,2], developed in the early 1950's, is one of the foundational models of nuclear structure. Its three main paradigms, deformed-rotational, spherical vibrational, and γ-soft, remain to this day benchmarks against which structure of nuclei are compared. Soon after the development of the vibrational limit of the Bohr Hamiltonian, in 1955 Scharff-Goldhaber and Weneser [3] used the ratio of the energy of the second excited state to the first excited state, E 2 /E 1 , to identify candidates for spherical vibrators. In this early work, the Cd nuclei 110 Cd and 114 Cd were cited as candidates, having E 2 /E 1 ≈ 2. Soon thereafter, in 1956 [4], spectroscopy following the (n, γ) capture reaction identified an additional 2 + level in the vicinity of the two-phonon triplet in 114 Cd. This was seen as a problem for the vibrational model by Cohen and Price [5], who, in 1960, using the (d, p) reaction, not only confirmed the additional 2 + level in 114 Cd, but also found an extra 0 + state. Further, they identified two 0 + and two 2 + states in 112 Cd at twice the energy of the 2 + 1 state. The validity of the phonon model was supported, however, by a series of Coulomb excitation experiments by McGowan and co-workers [6], results of which are shown in Fig. 1, that determined in 112,114,116 Cd the ratio B(E2; 4 + 1 → 2 + 1 )/B(E2; 2 + 1 → 0 + 1 ) was approximately equal to 2 (within the experimental uncertainty). Only in 110 Cd did the ratio of 1.42 ± 0.19 deviate significantly from 2.0. Furthermore, in 114,116 Cd, the ratio B(E2; 0 ′+ → 2 + 1 )/B(E2; 2 + 1 → 0 + 1 ) was measured to be near unity, again providing support to the phonon model.

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Characterization of Three-Phonon States inC110d

Cited by 50 publications

References 17 publications

102Ru: A pivotal nucleus in theA∼100region

102Ru: A pivotal nucleus in theA∼100region

Detailed spectroscopy of110Cd: Evidence for weak mixing and the emergence ofγ-soft behavior

The evolving structure of the Cd isotopes

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