Nanosecond lifetimes and electromagnetic transition strengths in 196Au

Petkov, P.; Jolie, J.; Heinze, Stefan; Drissi, S.; Dorthe, M.; Gröger, J.; Schenker, J.-L.

doi:10.1016/j.nuclphysa.2007.09.002

Cited by 2 publications

(5 citation statements)

References 19 publications

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“…The non-negligible components (> 10 %) of the corresponding IBFFM-2 wave functions for the 2 − 1 and 1 − 1 states are the following: (νp 1/2 ⊗ πd 3/2 ) J=2 − (24 %), (νp 1/2 ⊗ πs 1/2 ) J=1 − (11 %), and (νf 5/2 ⊗ πs 1/2 ) J=2 − (11 %) for the 2 − 1 state, and (νp 1/2 ⊗ πs 1/2 ) J=1 − (38 %) and (νp 1/2 ⊗ πd 3/2 ) J=1 − (10 %) for the 1 − 1 state. [55]. However, there are also too many experimental 1 − states below 298.5 keV, and it is not clear which theoretical 1 − state corresponds to the experimental one observed at E x = 298.5 keV.…”

Section: Aumentioning

confidence: 91%

“…The experimental values are taken from Refs. [53,54] (for 194 Au), [53,55] (for 196 Au), and [53] are, however, too large as compared to the experimental values. The sign of the predicted Q(1 − ) moment is opposite to that given by the experiment.…”

Section: Exptmentioning

confidence: 93%

“…The experimental values are taken from Refs. [53,54] (for 194 Au), [53,55] (for 196 Au), and [53] (for 198 Au)…”

Section: Odd-odd Au Isotopesmentioning

confidence: 99%

“…Furthermore, the present calculation considerably overestimates the 2 − 1 energy level. The non-negligible components (> 10 %) of the corresponding IBFFM-2 wave functions for the 2 − 1 and 1 transition rates from the 1 − state at the excitation energy of E x = 298.5 keV are available [55]. However, there are also too many experimental 1 − states below 298.5 keV, and it is not clear which theoretical 1 − state corresponds to the experimental one observed at E x = 298.5 keV.…”

Section: Aumentioning

confidence: 99%

“…5.Same as Fig.2, but for the odd-odd nuclei194,196,198 Au.The experimental values are taken from Refs [53,54]. (for 194 Au),[53,55] (for 196 Au), and[53] (for 198 Au)…”

mentioning

confidence: 99%

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Spectroscopy of odd-odd nuclei within the interacting boson-fermion-fermion model based on the Gogny energy-density functional

2019

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We present a method to calculate spectroscopic properties of odd-odd nuclei within the framework of the Interacting Boson-Fermion-Fermion Model based on the Gogny energy density functional. The (β, γ)-deformation energy surface of the even-even (boson-)core nucleus, spherical single-particle energies and occupation probabilities of the odd neutron and odd proton, are provided by the constrained self-consistent mean-field calculation within the Hartree-Fock-Bogoliubov method with the Gogny-D1M functional. These quantities are used as a microscopic input to fix most of the parameters of the IBFFM Hamiltonian. Only a few coupling constants for the boson-fermion Hamiltonian and the residual neutron-proton interaction are specifically adjusted to reproduce experimental low-energy spectra in odd-mass and odd-odd nuclei, respectively. In this way, the number of free parameters involved in the IBFFM framework is reduced significantly. The method is successfully applied to the description of the low-energy spectra and electromagnetic transition rates in the odd-odd 194,196,198 Au nuclei.

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Section: Aumentioning

confidence: 91%

Section: Exptmentioning

confidence: 93%

“…The experimental values are taken from Refs. [53,54] (for 194 Au), [53,55] (for 196 Au), and [53] (for 198 Au)…”

Section: Odd-odd Au Isotopesmentioning

confidence: 99%

Section: Aumentioning

confidence: 99%

“…5.Same as Fig.2, but for the odd-odd nuclei194,196,198 Au.The experimental values are taken from Refs [53,54]. (for 194 Au),[53,55] (for 196 Au), and[53] (for 198 Au)…”

mentioning

confidence: 99%

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Spectroscopy of odd-odd nuclei within the interacting boson-fermion-fermion model based on the Gogny energy-density functional

2019

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A system to measure isomeric state half-lives in the 10 ns to 10 μs range

Toufen

Allegro

Medina

et al. 2014

Review of Scientific Instruments

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The Isomeric State Measurement System (SISMEI) was developed to search for isomeric nuclear states produced by fusion-evaporation reactions. The SISMEI consists of 10 plastic phoswich telescopes, two lead shields, one NaI(Tl) scintillation detector, two Compton suppressed HPGe γ-ray detectors, and a cone with a recoil product catcher. The new system was tested at the 8 UD Pelletron tandem accelerator of the University of São Paulo with the measurement of two known isomeric states: (54)Fe, 10(+) state (E = 6527.1 (11) keV, T(1/2) = 364(7) ns) and the 5/2(+) state of (19)F (E = 197.143 (4) keV, T(1/2) = 89.3 (10) ns). The results indicate that the system is capable of identifying delayed transitions, of measuring isomeric state lifetimes, and of identifying the feeding transitions of the isomeric state through the delayed γ-γ coincidence method. The measured half-life for the 10(+) state was T(1/2) = 365(14) ns and for the 5/2(+) state, 100(36) ns.

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Nanosecond lifetimes and electromagnetic transition strengths in 196Au

Cited by 2 publications

References 19 publications

Spectroscopy of odd-odd nuclei within the interacting boson-fermion-fermion model based on the Gogny energy-density functional

Spectroscopy of odd-odd nuclei within the interacting boson-fermion-fermion model based on the Gogny energy-density functional

A system to measure isomeric state half-lives in the 10 ns to 10 μs range

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