The decay of78g Rb and78m Rb to levels in78Kr

Bavaria, G.; Crawford, J. E.; Calamawy, S.; Kitching, John

doi:10.1007/bf01414264

Cited by 15 publications

(6 citation statements)

References 26 publications

(28 reference statements)

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“…Initially, positive parity was assigned because it is difficult to find any suitable configuration which gives 0 − spin and parity. Similar arguments have been advanced in earlier publications [43,44] on this topic. More convincingly, McNeill et al [25] showed that the isomeric spin 4 state at 111.2 keV and the ground state have opposite parities.…”

Section: The Decay Scheme Of 78 Srsupporting

confidence: 85%

βdecay of78Sr

et al. 2011

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The γ rays and conversion electrons emitted in the β decay of 78 Sr to levels in 78 Rb have been studied using Ge detectors and a mini-orange spectrometer. A reliable level scheme based on the results of these experiments has been established. The properties of the levels in 78 Rb have been compared with calculations based on deformed Hartree-Fock with Skyrme interactions and pairing correlations in the BCS approximation. This has allowed an interpretation of the nature of the observed sets of levels in the odd-odd nucleus 78 Rb.

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Section: The Decay Scheme Of 78 Srsupporting

confidence: 85%

βdecay of78Sr

et al. 2011

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“…The long lifetime of the isomeric level could possibly be explained (as suggested in Ref. [17]) by its excitation energy being very close to that of the 103 keV level.…”

mentioning

confidence: 71%

“…Finally, we determined the K-conversion coefficient of the 103 keV transition, which shows the same lifetime as the isomeric 4 state in Rb and presumably populates the ground state of this nucleus [17]. From the value atr=(70~10) &&10, we deduce an E2 multipolarity for this transition, leading to the assignment J =2 for the hypothetical level lying 103 keV above the ground state of Rb.…”

mentioning

confidence: 96%

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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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“…Here we can rely on published information on all of the decays [16][17][18] except for 78 Sr decay, where we carried out a dedicated experiment [19] at CERN-ISOLDE to establish its decay scheme.…”

Section: Introductionmentioning

confidence: 99%

Deformation of Sr and Rb isotopes close to theN=Zline viaβ-decay studies using the total absorption technique

et al. 2013

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A study of the Gamow-Teller strength distributions B(GT) in the beta decay of 78 Sr and 76,78 Rb has been made using a total absorption spectrometer (TAS). Following the success in deducing the sign of the deformation for 76 Sr, a similar approach is adopted for 78 Sr based on a comparison of the measured B(GT) with quasiparticle random-phase approximation calculations. This work confirms its previously expected prolate deformation in the ground state. Conclusions about the structure of the odd-odd 76,78 Rb isotopes have been drawn based on their measured B(GT) distributions.

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The decay of78g Rb and78m Rb to levels in78Kr

Cited by 15 publications

References 26 publications

βdecay of78Sr

βdecay of78Sr

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

Deformation of Sr and Rb isotopes close to theN=Zline viaβ-decay studies using the total absorption technique

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The decay of78g Rb and78m Rb to levels in78Kr

Cited by 15 publications

References 26 publications

βdecay of78Sr

βdecay of78Sr

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

Deformation of Sr and Rb isotopes close to theN=Zline viaβ-decay studies using the total absorption technique

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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
View full text Add to dashboard Cite