2005, English, Article edition: Shape coexistence in odd and odd-odd nuclei in the A $\sim$ 100 region Pinston, J.A.; Genevey, J.; Simpson, G.S.; ...

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Physical Description
  • text
Published
  • HAL - CCSD
  • 2005
Language
  • English

Edition details

Title
  • Shape coexistence in odd and odd-odd nuclei in the A $\sim$ 100 region
Author
  • Pinston, J.A.
  • Genevey, J.
  • Simpson, G.S.
  • Urban, W.
Published
  • HAL - CCSD
  • 2005
Physical Description
  • text
Subjects
Notes
  • In the even-even nuclei around A=​100 a transition from spherical to deformed shapes occurs from N=​58 to N=​60. The isotones with N=​59 are of special interest, because they are just at the border between the two regions. Very recently, we have studied odd-neutrons and odd-odd nuclei with N=​59, by means of prompt $\gamma$-ray spectroscopy of the spontaneous fission of $^{247}$Cm, using the EUROGAM 2 multi-detector, and by measurements of $\mu$s isomers produced by fission of $^{239,241}$Pu with thermal neutrons at ILL (Grenoble). In the latter case, the detection is based on time correlation measurements between fission fragments detected by the LOHENGRIN mass spectrometer and $\gamma$-rays or conversion electrons from the isomer decay. It was found that three shapes coexist in the odd $^{97}$Sr and $^{99}$Zr and two shapes coexist in the odd-odd $^{96}$Rb. A simple explanation of the shape-coexistence mechanism is proposed. It is based upon the Nilsson diagram and stresses the fundamental importance of the unique parity states.
  • HAL:in2p3-00024168, version 1
  • HAL:http:/​/​hal.in2p3.fr/​in2p3-00024168/​en/​
  • DOI:10.1063/​1.2137241
Language
  • English
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