The chiral doublet bands with three-quasiparticle configuration （πg9/2）-1 （vh11/2）2 are studied by the fully quantal triaxial particle rotor model. The energy spectra and B（M1）/B（E2） ratios of the doublet ban...The chiral doublet bands with three-quasiparticle configuration （πg9/2）-1 （vh11/2）2 are studied by the fully quantal triaxial particle rotor model. The energy spectra and B（M1）/B（E2） ratios of the doublet bands with different triaxiality parameter γ are systematically analyzed. It is found that γ is a sensitive parameter for the properties of these doublet bands.展开更多
Delayed γ-ray spectroscopy of^(185)Au was studied at the Argonne Gas-Filled Analyzer.A new isomer at an excitation energy of 1504.2(4) keV with a half-life of 630(80) ns was identified via γ-γ coincidence analysis,...Delayed γ-ray spectroscopy of^(185)Au was studied at the Argonne Gas-Filled Analyzer.A new isomer at an excitation energy of 1504.2(4) keV with a half-life of 630(80) ns was identified via γ-γ coincidence analysis,decaying via a 294.8(3) keV transition.Based on Weisskopf estimates,the multipolarity of the 295 keV transition is assigned to be E1,M1,E2,or M2.Possible configurations for this new isomer are discussed based on configurationconstrained potential energy surface calculations.展开更多
The signature splitting observed in the 3/2[521]_(ν)↑⊗1/2[660]_(ν)↑⊗1/2[660]_(ν)↑three-quasineutron rotational band of 155 Dy is examined within the framework of axially symmetric three-quasiparticle plus axiall...The signature splitting observed in the 3/2[521]_(ν)↑⊗1/2[660]_(ν)↑⊗1/2[660]_(ν)↑three-quasineutron rotational band of 155 Dy is examined within the framework of axially symmetric three-quasiparticle plus axially symmetric rotor model.The experimental level energies and magnitudes of observed splitting are well-reproduced with RMS deviations of 68.13 keV and 0.58 keV,respectively.The major contributing bands in the observed splitting are K^(π)=7/2^(-):5/2[512]_(ν)↑⊗3/2[651]_(ν)↑⊗1/2[660]_(ν)↓,K^(π)=5/2^(-):5/2[512]_(ν)↑⊗3/2[651]_(ν)↑⊗3/2[651]_(ν)↓,K^(π)=1/2^(-):3/2[521]_(ν)↑⊗1/2[660]_(ν)↑⊗3/2[651]_(ν)↓,K^(π)=1/2^(-):3/2[521]_(ν)↓⊗1/2[660]_(ν)↑⊗3/2[651]_(ν)↑,K^(π)=5/2^(-):3/2[521]_(ν)↑⊗3/2[651]_(ν)↑⊗1/2[660]_(ν)↓,and K^(π)=3/2^(-):3/2[521]_(ν)↑⊗3/2[651]_(ν)↑⊗3/2[651]_(ν)↓,which mix through rotor-particle(ΔK=1)and particle-particle(ΔK=0)couplings among the bands comprising the given basis space.The observed signature splitting is also wellreproduced by the superposition of calculated energy staggering of the strongly interacting bands,which further strengthens the validity of present particle rotor model calculations.Based on the present calculations,we assign the bandhead spin K^(π)=3/2^(-)to the band under discussion.Additionally,the locations of 13 low-lying band members in the spin range I^(π)=3/2^(-)to 23/2^(-)and at 27/2^(-)and 31/2^(-)are predicted,which will be useful for future experimental investigations.展开更多
基金supported by National Natural Science Foundation of China(Nos.11005069,10875074,11175108)
文摘The chiral doublet bands with three-quasiparticle configuration （πg9/2）-1 （vh11/2）2 are studied by the fully quantal triaxial particle rotor model. The energy spectra and B（M1）/B（E2） ratios of the doublet bands with different triaxiality parameter γ are systematically analyzed. It is found that γ is a sensitive parameter for the properties of these doublet bands.
基金Supported by the National Natural Science Foundation of China (12405140, 12135004, 11961141004, U2032138, 12275369)the Natural Science Foundation of Gansu Province, China (24JRRA033)+4 种基金financial support from the STFCfunded by the Chinese Academy of Sciences President's International Fellowship Initiative (2020VMA0017)Supported by the U.S. Department of Energy, Office of Nuclear Physics, (DE-AC02-06CH11357, DE-FG02-94ER41041 (UNC), DE-FG02-97ER41033 (TUNL))supported by the Slovak Research and Development Agency (APVV-22-0282)Slovak Grant Agency VEGA (1/0019/25)。
文摘Delayed γ-ray spectroscopy of^(185)Au was studied at the Argonne Gas-Filled Analyzer.A new isomer at an excitation energy of 1504.2(4) keV with a half-life of 630(80) ns was identified via γ-γ coincidence analysis,decaying via a 294.8(3) keV transition.Based on Weisskopf estimates,the multipolarity of the 295 keV transition is assigned to be E1,M1,E2,or M2.Possible configurations for this new isomer are discussed based on configurationconstrained potential energy surface calculations.
基金Supported by Akal University,Talwandi Sabo,Bathinda,Punjab,India,International Atomic Energy Agency(IAEA),Vienna,Austria and DAE-BRNS,Government of India(Grant No.36(6)/14/60/2016-BRNS/36145)。
文摘The signature splitting observed in the 3/2[521]_(ν)↑⊗1/2[660]_(ν)↑⊗1/2[660]_(ν)↑three-quasineutron rotational band of 155 Dy is examined within the framework of axially symmetric three-quasiparticle plus axially symmetric rotor model.The experimental level energies and magnitudes of observed splitting are well-reproduced with RMS deviations of 68.13 keV and 0.58 keV,respectively.The major contributing bands in the observed splitting are K^(π)=7/2^(-):5/2[512]_(ν)↑⊗3/2[651]_(ν)↑⊗1/2[660]_(ν)↓,K^(π)=5/2^(-):5/2[512]_(ν)↑⊗3/2[651]_(ν)↑⊗3/2[651]_(ν)↓,K^(π)=1/2^(-):3/2[521]_(ν)↑⊗1/2[660]_(ν)↑⊗3/2[651]_(ν)↓,K^(π)=1/2^(-):3/2[521]_(ν)↓⊗1/2[660]_(ν)↑⊗3/2[651]_(ν)↑,K^(π)=5/2^(-):3/2[521]_(ν)↑⊗3/2[651]_(ν)↑⊗1/2[660]_(ν)↓,and K^(π)=3/2^(-):3/2[521]_(ν)↑⊗3/2[651]_(ν)↑⊗3/2[651]_(ν)↓,which mix through rotor-particle(ΔK=1)and particle-particle(ΔK=0)couplings among the bands comprising the given basis space.The observed signature splitting is also wellreproduced by the superposition of calculated energy staggering of the strongly interacting bands,which further strengthens the validity of present particle rotor model calculations.Based on the present calculations,we assign the bandhead spin K^(π)=3/2^(-)to the band under discussion.Additionally,the locations of 13 low-lying band members in the spin range I^(π)=3/2^(-)to 23/2^(-)and at 27/2^(-)and 31/2^(-)are predicted,which will be useful for future experimental investigations.
