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

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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 ... continued below

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Stoyer, M A & Walters, W B February 26, 2008.

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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.

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5 p. (0.2 MB)

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

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  • Report No.: LLNL-PROC-403727
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 932395
  • Archival Resource Key: ark:/67531/metadc897658

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  • February 26, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • April 13, 2017, 6:13 p.m.

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Stoyer, M A & Walters, W B. Spectroscopy of neutron-rich palladium and cadmium isotopes near A=120, article, February 26, 2008; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc897658/: accessed September 19, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.