Nuclear data sheets update for A = 78

Rab, Shaheen

doi:10.1016/s0090-3752(05)80001-8

Cited by 48 publications

(15 citation statements)

References 128 publications

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“…The odd-even staggering phase of the γ-band is quite opposite in these two models and has been proposed to be an indicator of the nature of the γ-deformation. What we have shown using the microscopic TPSM model is that the configuration mixing [35][36][37][38] for 70−80 Ge for the relation between spin I and transition energy E γ . Results of the spherical shell model (SSM) calculations [12] are also shown for the available nuclei.…”

Section: Discussionmentioning

confidence: 75%

Nature ofγdeformation in Ge and Se nuclei and the triaxial projected shell model description

et al. 2014

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Recent experimental data have demonstrated that 76 Ge may be a rare example of a nucleus exhibiting rigid γ-deformation in the low-spin regime. In the present work, the experimental analysis is supported by microscopic calculations using the multi-quasiparticle triaxial projected shell model (TPSM) approach. It is shown that to best describe the data of both yrast and γ-vibrational bands in 76 Ge, a rigid-triaxial deformation parameter γ ≈ 30 • is required. TPSM calculations are discussed in conjunction with the experimental observations and also with the published results from the spherical shell model. The occurrence of a γγ-band in 76 Ge is predicted with the bandhead at an excitation energy of ∼ 2.5 MeV. We have also performed TPSM study for the neighboring Ge-and Se-isotopes and the distinct γ-soft feature in these nuclei is shown to result from configuration mixing of the ground-state with multi-quasiparticle states.

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Section: Discussionmentioning

confidence: 75%

Nature ofγdeformation in Ge and Se nuclei and the triaxial projected shell model description

et al. 2014

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“…The DSSSD detector also served as a β detector. The β detection efficiency was determined using the decay of 78 Ga [20], and was found to be approximately 20%.…”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

β-decay measurements forN>40Mn nuclei and inference of collectivity for neutron-rich Fe isotopes

Daugas¹,

Matéa²,

Delaroche³

et al. 2011

Phys. Rev. C

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“…We recall that in the U(5) and O(6) limit of the IBM-2 model the first mixed symmetry state is predicted to have J =2+ and that in some nuclei having a structure close to these limits the largest mixed symmetry component has been found in the 23+ level [19][20][21][22]. The 1756 keV level, which decays to the triplet 02, 22, 4, + but also to the 2, and 0+, states [5], shows properties compatible with a large mixed symmetry component [23].…”

mentioning

confidence: 84%

“…The low-lying levels in Kr were populated in the P /EC decay of Rb [5] collected at the ISOLDE mass separator (CERN). The conversion electrons were analyzed by means of a compact magnetic transport system [6] coupled to a 5 cm x6 mm Si(Li) detector cooled down to the liquid nitrogen temperature.…”

mentioning

confidence: 99%

“…The experimental results, together with other relevant quantities, are reported in Table II. The information available previous to this work on spin and parity of initial levels [5] is given in the second column. Theoretical E-conversion coefficients [9] are reported only for El, M 1, and E2 multipolarities since, in the given energy range, the values of az for M2 and higher multipolarities are at least a factor of 2 larger.…”

mentioning

confidence: 99%

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Decay properties of the02+state and spin-parity assignments inKr
Giannatiempo
¹
,
Nannini
²
,
Perego
³

et al. 1995
Phys. Rev. C
17
1
10
0
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The lifetime 7. of the 02 state in Kr has been measured by means of the Doppler shift attenuation method in gases. From the value of~and the measured value of the K-internal conversion branching Is(Oz~0,+)/Itt(Oz~2, +) the value of the electric monopole strength p (EO) of the 02 -+0, + transition has been deduced. Restriction or assignments for the spin parity of several levels in Kr, populated in the decay of Rb, have been deduced by measuring K-internal conversion coefficients of the relevant transitions. PACS number(s): 23.20.Nx, 21.10.Hw, 23.20.Lv, 27.50.+e As a part of a systematic investigation of the EO and E2 decay modes of 0+ excited states in even krypton isotopes, we recently reported some spectroscopic data on Kr concerning, in particular, the decay properties of the 02 state [I] In even krypton isotopes this state was interpreted by some authors [2] as belonging to the standard space of the interacting boson model in its IBM-1 version [3],while other authors [4], applying the IBM-2 model [3], interpreted it as an "intruder state, " i.e. , as lying outside the IBM model space. In Refs. [2,4] the comparison between experimental and calculated data relevant to 02 states was necessarily limited to excitation energies, due to the lack of experimental data on transition strengths from these states. In Ref. [1]we compared the available spectroscopic data on low-lying levels of Kr with the values predicted by the IBA-2 model, when a set of parameters different from that adopted in Ref.[4] is used. We found that it is still possible to give a consistent description both of excitation energies of the 02 state in these nuclei and decay properties of the 02 state in Kr, without introducing configurations lying outside the IBA-2 model space.In this paper we report on measurements in Kr concerning (i) the decay properties of the 1017 keV, Oz state, which could provide further support to the proposed description of the 02 states in Kr and (ii) the determination of several internal conversion coefficients, which enable us to assign the parity of several levels as well as to restrict the possible range of their spin values. This information is necessary for an analysis of the low-lying positive-parity levels of the even krypton isotopes (that we plan to perform in the near future) aimed at the identification of states having predominant mixed symmetry character under exchange of proton and neutron bosons [3]. The low-lying levels in Kr were populated in the P /EC decay of Rb [5] collected at the ISOLDE mass separator (CERN). The conversion electrons were analyzed by means of a compact magnetic transport system [6] coupled to a 5 cm x6 mm Si(Li) detector cooled down to the liquid nitrogen temperature. Under typical experimental conditions the energy resolution (full width at half maxi-mum) at 1 MeV was about 2 keV. Due to the large number of y rays in the decay of Rb, which generate considerable background in the silicon detector, it has been necessary to

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Nuclear data sheets update for A = 78

Cited by 48 publications

References 128 publications

Nature ofγdeformation in Ge and Se nuclei and the triaxial projected shell model description

Nature ofγdeformation in Ge and Se nuclei and the triaxial projected shell model description

β-decay measurements forN>40Mn nuclei and inference of collectivity for neutron-rich Fe isotopes

Decay properties of the02+state and spin-parity assignments inKr
Giannatiempo
¹
,
Nannini
²
,
Perego
³

et al. 1995
Phys. Rev. C
17
1
10
0
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Nuclear data sheets update for A = 78

Cited by 48 publications

References 128 publications

Nature ofγdeformation in Ge and Se nuclei and the triaxial projected shell model description

Nature ofγdeformation in Ge and Se nuclei and the triaxial projected shell model description

β-decay measurements forN>40Mn nuclei and inference of collectivity for neutron-rich Fe isotopes

Decay properties of the02+state and spin-parity assignments inKrGiannatiempo1, Nannini2, Perego3 et al. 1995Phys. Rev. C171100View full textAdd to dashboardCite

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About

Decay properties of the02+state and spin-parity assignments inKr
Giannatiempo
¹
,
Nannini
²
,
Perego
³

et al. 1995
Phys. Rev. C
17
1
10
0
View full text Add to dashboard Cite