O+ states observed in Cd and Sn nuclei with the (3He, n) reaction

Fielding, H.W.; Anderson, Richard E.; Zafiratos, C.D.; Lind, David A.; Cecil, F. E.; Wieman, H.; Alford, W.P.

doi:10.1016/0375-9474(77)90504-8

Cited by 141 publications

(48 citation statements)

References 21 publications

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“…The intruder band is well established, with the 0 two-proton transfer reaction [7]. Unfortunately, the lifetime of the 0 + 2 (i) state is too long to be measured in the present work, and a lower limit of 1800 fs is determined, establishing a B(E2) upper limit of 40 W.u.…”

Section: A Intruding π2p − 4h Configurationmentioning

confidence: 75%

“…The conclusion that these extra levels were part of a deformed coexisting structure was firmly established by Meyer and Peker [5]. These bands are based [5,6] on 2p − 4h proton "intruder" excitations across the Z = 50 closed shell, and are evidenced by the enhanced ( 3 He, n) cross sections associated with the 0 + band heads observed by Fielding et al [7]. In the following sections, members of the intruder band are labeled with (i) to facilitate the discussion.…”

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confidence: 83%

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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: A Intruding π2p − 4h Configurationmentioning

confidence: 75%

mentioning

confidence: 83%

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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“…The experimental 0 ~ differential cross sections for the A(3He, n)B reactions [6][7][8] have been compared to the results of DWBA calculations, carried out using the programme DWUCK4 [9], in order to obtain the so-called enhancement factors e, defined in [6][7][8], and given by:…”

Section: Analysis Of the Experimental Datamentioning

confidence: 99%

“…Simple analytical expressions can be obtained in the two models for the relative intensities of the L=0 transfers between the 0 § ground states of even-even nuclei [4,5]. Extensive experimental data are available on the (3He, n) two-proton transfer reaction in the A~100 region [6][7][8], and in particular on the cross sections at 0 ~ for the L=0 transfers between the ground states of the even-even Sr, Zr, Mo, Ru, Pd, Cd and Sn isotopes I- 6,7], and between the lowest 1/2-levels in the odd-Z Ag and In isotopes [8]. They were obtained at the same laboratory, using the same 3He energy (25.4MeV), and under the same experimental conditions.…”

Section: Introductionmentioning

confidence: 98%

On the (3He,n) reaction in theA ? 100 region

Vervier¹,

Mareschal²

1986

Z. Physik A - Atomic Nuclei

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The available experimental data on the (3He, n) reaction between the ground states of even-even nuclei and lowest 1/2-levels of odd-A nuclei in the A~100 region are analyzed in a systematic way by the DWBA. The deduced relative intensities of these two-proton transfers, and their uncertainties, are compared to the predictions of various nuclear models. In particular, the influence of the finite dimension of the configuration space available to the transferred protons, and of the blocking effect of a 2p 1/2-proton, are examined.

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“…This simple picture is complicated in the cadmium isotopes, in part, by nonzero quadrupole moments and low-lying intruder states (caused by the elevation of two protons across the Z = 50 shell gap). The intruder states in 110,112 Cd have been shown to be strongly populated in the ( 3 He,n) reaction [4]. Therefore, these intruder states must be accounted for in any detailed vibration-like calculation, which is possible within the IBM-2 framework [5,6].…”

Section: Introductionmentioning

confidence: 99%