The isomeric structure in the N=73 neutron-deficient nuclei 132Pr and 130La

  • Gharam Alharshan

Student thesis: Phd


The isomeric structure of the neutron deficient nucleus 132Pr in themass 130-140 region of nuclear chart has been studied with the 98Mo(40Ar,p5n) 132Pr reaction at beam energies of 150 and 165MeV. Theexperiment was performed at the university of Jyväskylä , Finland where the40Ar beam was accelerated onto the target by the K130 cyclotron. TheJUROGAM II HPGe detector array was employed in conjunction with the RITUgas filled recoil separator. A new isomer has been established. Two newdelayed transitions have been observed at energies of 101 and 118 keV.Prompt transition previously established in 132Pr are in coincide with thenewly identified delayed transition. The half-life of the isomeric state in 132Prwas determined from a series of focal-plane time spectra gated on thedelayed 101 and 118kev gamma -ray transitions at both beam energies.The half-life of the isomeric state has been measured to be 2.6 (3)μs.Ongoing analysis aims to place the isomeric state in the known prompt levelscheme of 132Pr, and intrpret it's structure properties from the transitionsseen to directly feed the isomer
Date of Award1 Aug 2013
Original languageEnglish
Awarding Institution
  • The University of Manchester
SupervisorDavid Cullen (Supervisor)

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