Anomalous behaviour of transition probabilities in75Kr

Skoda, S.; Wood, John L.; Eberth, J.; Busch, J.; Liebchen, M.; Mylaeus, T.; Schmal, N.; Sefzig, R.; Teichert, W.; Wiosna, M.

doi:10.1007/bf01294113

Cited by 8 publications

(27 citation statements)

References 29 publications

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“…Despite some restrictions concerning the usability of the angular correlation mixing ratios (for some strong E2 transitions the expected mixing ratio equal zero lay outside the error margins of the evaluated M3/E2 mixing ratio) these mixing ratios point, in conjunction with those from conversion electron measurements (see Section 2.5), at smaller mixing ratios compared to those determined by angular distribution in Ref. [ 19].…”

Section: Dco Ratiosmentioning

confidence: 70%

“…Likewise the feeding point of other transitions had been defined in Ref. [ 19] by the yrast band transition with the highest excitation energy observed in coincidence. The OSIRIS spectrometer had been combined with an inner shell of 48 BGO detectors providing a sum energy and multiplicity filter.…”

Section: Yy-coincidences Measured With a Thick Targetmentioning

confidence: 99%

“…Thus, the level scheme had to be rearranged in a new pattern compared to Ref. [ 19]. Despite some ambiguities, e.g in the excitation functions [25], in the old level scheme the feeding point of the 750-577-608 keV coincidences had been defined by the 844 keV yrast band transition, which now has been identified as a doublet in 75Kr.…”

Section: Yy-coincidences Measured With a Thick Targetmentioning

confidence: 99%

“…The AI = 1 transitions feeding into the 5/2 + band were normalized to the 392 keV intensity determined in the neutron coincident angular distribution published in Ref. [19]. The 297/689 branching ratio was taken from Table 1 and all E2 transitions feeding into the 5/2 + band were normalized to the calculated intensity of the 689 keV transition.…”

Section: -mentioning

confidence: 99%

“…The 297/689 branching ratio was taken from Table 1 and all E2 transitions feeding into the 5/2 + band were normalized to the calculated intensity of the 689 keV transition. For the transitions feeding into the 3/2-band, AI= 1 transitions were normalized to the 253 keV transition intensity and the E2 transitions were normalized to the 547 keV transitions intensity, either measured via neutron coincident angular distribution [ 19].…”

Section: -mentioning

confidence: 99%

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Prolate-oblate shape coexistence in 75Kr

et al. 1998

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The collective bands of 75Kr were extended up to spin 45/2 using the compound reactions 5°Cr(28Si,2pn), 54Fe(24Mg,2pn) and 58Ni(2°Ne,2pn)YSKr. Lifetimes were measured by RDDS with nine OSIRIS detectors in coincidence. Mixing ratios were determined by measurements of internal conversion coefficients, angular distribution and correlations. Deviations between different measurements are explained by the short lifetimes leading to angle dependent intensity losses due to Doppler shift. Spins and parities were assigned from angular distributions, excitation functions and DCO ratios measured with the OSIRIS_12 spectrometer. The band head spin of the negative parity yrast band was established as 3/2 via DCO ratios and internal conversion coefficients. Further bands at low excitation energy were found. In accordance to Woods-Saxon cranking model calculations, these weaker populated sidebands are interpreted to be built on oblate deformed intrinsic states (/32 ~ -0.2), while the strongly populated bands are built on prolate deformed states (~2 ~ +0.4). The interpretation of the lqp g9/2 yrare band, to be generated from oblate deformation, is further supported by A1 = 0 transitions into the yrast band and a similar oblate deformed g9/z structure in the isotone 73Se. The experimental level energies, branching ratios, transition probabilities and mixing ratios are compared to rotor model calculations. The deviations between experiment and rotor model calculations are interpreted to be based on mixing between prolate and oblate states.

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Section: Dco Ratiosmentioning

confidence: 70%

Section: Yy-coincidences Measured With a Thick Targetmentioning

confidence: 99%

Section: Yy-coincidences Measured With a Thick Targetmentioning

confidence: 99%

Section: -mentioning

confidence: 99%

Section: -mentioning

confidence: 99%

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Prolate-oblate shape coexistence in 75Kr

et al. 1998

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The ? decay of the new isotope79Y

Mukai

Odahara

Nakatani

et al. 1992

Z. Physik A - Hadrons and Nuclei

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The neutron deficient isotope 79y has been firstly identified and the decay properties were studied from ]/-decay measurements in the reaction of 54Fe(28Si, p2n) at 92MeV. Three 7 rays of 152.5, 177.4, and 1106 keV were observed concerning the fl decay. The half life and QEC value were determined to be 14.9+0.6 s and 7.12_+0.45 MeV, respectively. The decay scheme including spin-parity is discussed, and 5/2 + assignment for the ground state is proposed.

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