Nuclear spectroscopy of neutron-deficient hafnium and rare earth activities

Harmatz, B.; Handley, T.H.

doi:10.1016/s0029-5582(66)80038-x

Cited by 83 publications

(22 citation statements)

References 25 publications

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“…All previous measurements [5,7,8] were performed with scintillation detectors. Assuming that the 230 keV transition is of a pure E2 character, [6,11] The first of these two values is in very good agreement with conversion coefficient measurements [6,11]. Measured A22 and A44 coefficients for the 230 7-114 7 directional correlation give a unique value for the 319keV-114keV -0.008 _+0.013 0.007 -+0.015 present -0.023 -+0.017 [5] mixing ratio of the 114 keV transition: [6].…”

Section: Resultssupporting

confidence: 72%

“…9 and 10. More accurate measurements of the internal conversion coefficients [11,12] give, however, a higher value for this mixing ratio. The discrepancy could mean that the penetration effects in the retarded 343 keV transition are slightly larger than assumed in Ref.…”

Section: Discussionmentioning

confidence: 96%

“…For the 343 keV transition absolute values of the multipole mixing ratios are in disagreement [9][10][11][12][13]. Reported E2 admixture ranges from 0 ~o [10] to about 10 ~o [ 11]. Internal conversion measurements for the 343 keV transition, hindered by a factor of ,,~ 700 with respect to the single particle estimate, are complicated by the possible presence of penetration effects [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…More recent measurements [18] also show inconsistencies for the E2 admixture determined from the different subshell ratios. A possibility for an unambiguous, accurate measurement of the magnitude and sign of the mixing ratios of the 89, 114, 319 and 343 keV transitions in 175Lu is provided by electron capture decay of l 75Hf" The 230 keV transition has been shown to be of a pure E2 character [6,11]. This is in agreement with the Nilsson model description, according to which the 230 keV transition occurs between the [402] 5/2 + and [404] 9/2 + excited states [2].…”

Section: Introductionmentioning

confidence: 99%

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Multipole mixing ratios of transitions in175Lu populated from the decay of175Hf

et al. 1975

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Abstract. Electron capture decay of 175Hf(70 d) provides a possibility for unambiguous determination of the sign and magnitude of multipole mixing ratios for 89 keV and 114 keV transitions in lVSLu. This is because both gamma rays are in coincidence with the 230 keV transition which is of a pure E2 character. The results of the 7-7 directional correlation measurements, in terms of E2/M 1 mixing ratios &, are 689--0.11_ 0.07 and 5114 = 0.465 4-0.005. In addition the directional correlation measurements of the 89 7-343 7 and 319 7-114 7 cascades yield 6343 = 0.08 4-0.07 and 6319 = -0.152 _+ 0.015. Radioactivity 175Hf from lV4Hf(n, 7); measured 7-7(0) deduced 6(E2/M1); Ge(Li) detectors.

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Section: Resultssupporting

confidence: 72%

Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Multipole mixing ratios of transitions in175Lu populated from the decay of175Hf

et al. 1975

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“…Most of the y-ray and the coincidence studies have been made with NaI(T1) or small volume Ge(Li) detectors with poor resolution. The result is that there exists considerable amount of discrepancies between the level schemes proposed by Adam et al [6], Harmatz and Handley [13], Jaklevic et al [16] and Eppley et at. [19].…”

Section: Introductionmentioning

confidence: 98%

Decay of149Gd and directional correlations of gamma cascades in149Eu

Sen

Bakhru²,

Cue³

et al. 1975

Z Physik A

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Abstract. The decay of 149Gd(9.4 d) to the levels of 149En has been studied using large volume high resolution Ge(Li) and NaI(T1) detectors. 7-7 coincidence and directional correlation experiments have been performed. New 7-rays at energies 131.9, 278.6, 384.7, 415.7, 599.2, 726.5, 734.7, 956.4 and 1,231.1 keV in t49Eu have been observed. Three new levels in 149Eu have been placed at 956.4, 1,082.0 and 1,231.1 keV. Spin-parity assignments have been made to some of the levels in 149Eu. Multipolarity assignments have been made for most of the electromagnetic transitions from the conversion coefficients obtained through the knowledge of our 7-transition intensities and the published conversionelectron intensities. Based on the new y-transitions observed in the singles and coincidence spectra, a revised level scheme has been proposed for 149Eu and compared with previously published level schemes. Radioactivity 149Gd; measured T~/2, E~, Iv, Y7 coin, yT(0), I.C.C., 149Eu deduced levels, J, y-mixing, re. Enriched targets, Ge(Li) detectors.

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Nuclear Data Sheets for A = 171

Baglin

2002

Nuclear Data Sheets

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Nuclear spectroscopy of neutron-deficient hafnium and rare earth activities

Cited by 83 publications

References 25 publications

Multipole mixing ratios of transitions in175Lu populated from the decay of175Hf

Multipole mixing ratios of transitions in175Lu populated from the decay of175Hf

Decay of149Gd and directional correlations of gamma cascades in149Eu

Nuclear Data Sheets for A = 171

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