Spectroscopy of neutron-rich palladium and cadmium isotopes near A=120

Stoyer, M A; Walters, W B

Title: Spectroscopy of neutron-rich palladium and cadmium isotopes near A=120

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Abstract

New high-spin levels have been identified in the nucleus {sup 120}Pd from analysis of the coincidence gamma rays observed in the {sup 238}U({alpha}, f{gamma}{gamma}{gamma}) reaction. Recoiling fragments were detected with the Rochester heavy-ion detector array, CHICO, in coincidence with gamma-rays using Gammasphere. An A=110-130 mass-gated {gamma} - {gamma} - {gamma} cube from this experiment was constructed and analyzed for coincident gamma-rays in several nuclei near A=120. New results for neutron-rich {sup 118}Pd and {sup 120}Pd have been obtained. The {sup 120}Pd level scheme was extended to spin of 10{sup +} by building on the new low-energy gamma rays identified in decay studies of {sup 120}Rh. The details of the {sup 118}Pd level scheme derived from this work are compared to previous work. The systematics of the yrast levels in even-even Pd and Cd isotopes are presented and the symmetry of energy levels around N = 68 is discussed. A new 10{sup +} level in {sup 124}Cd has been observed. The population intensity of even-even neutron-rich Cd isotopes is deduced, indicating that nuclides near {sup 120}Cd are preferentially populated following alpha-induced fission of {sup 238}U.

Authors:: Stoyer, M A; Walters, W B

Publication Date:: Tue Feb 26 00:00:00 EST 2008

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 932395

Report Number(s):: LLNL-PROC-403727
TRN: US0803525

DOE Contract Number:: W-7405-ENG-48

Resource Type:: Conference

Resource Relation:: Conference: Presented at: 4th International Conference on Fission and Properties of Neutron-rich Nuclei, Sanibel Island, FL, United States, Nov 11 - Nov 17, 2007

Country of Publication:: United States

Language:: English

Subject:: 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; CADMIUM ISOTOPES; DECAY; ENERGY LEVELS; FISSION; ISOTOPES; NUCLEI; PALLADIUM; SPECTROSCOPY; SPIN; SYMMETRY

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                    Stoyer, M A, and Walters, W B. Spectroscopy of neutron-rich palladium and cadmium isotopes near A=120.  United States: N. p., 2008. 
        Web.

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                    Stoyer, M A, & Walters, W B. Spectroscopy of neutron-rich palladium and cadmium isotopes near A=120.  United States.

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                    Stoyer, M A, and Walters, W B. 2008.  
        "Spectroscopy of neutron-rich palladium and cadmium isotopes near A=120".  United States.  https://www.osti.gov/servlets/purl/932395.

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@article{osti_932395,

  title        = {Spectroscopy of neutron-rich palladium and cadmium isotopes near A=120},

  author       = {Stoyer, M A and Walters, W B},

  abstractNote = {New high-spin levels have been identified in the nucleus {sup 120}Pd from analysis of the coincidence gamma rays observed in the {sup 238}U({alpha}, f{gamma}{gamma}{gamma}) reaction. Recoiling fragments were detected with the Rochester heavy-ion detector array, CHICO, in coincidence with gamma-rays using Gammasphere. An A=110-130 mass-gated {gamma} - {gamma} - {gamma} cube from this experiment was constructed and analyzed for coincident gamma-rays in several nuclei near A=120. New results for neutron-rich {sup 118}Pd and {sup 120}Pd have been obtained. The {sup 120}Pd level scheme was extended to spin of 10{sup +} by building on the new low-energy gamma rays identified in decay studies of {sup 120}Rh. The details of the {sup 118}Pd level scheme derived from this work are compared to previous work. The systematics of the yrast levels in even-even Pd and Cd isotopes are presented and the symmetry of energy levels around N = 68 is discussed. A new 10{sup +} level in {sup 124}Cd has been observed. The population intensity of even-even neutron-rich Cd isotopes is deduced, indicating that nuclides near {sup 120}Cd are preferentially populated following alpha-induced fission of {sup 238}U.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/932395},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Feb 26 00:00:00 EST 2008},

  month        = {Tue Feb 26 00:00:00 EST 2008}

}

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