Z dependence of the N=152 deformed shell gap: In-beam γ-ray spectroscopy of neutron-rich Pu245,246

H. Makii; T. Ishii; M. Asai; K. Tsukada; A. Toyoshima; M. Matsuda; A. Makishima; J. Kaneko; H. Toume; S. Ichikawa; S. Shigematsu; T. Kohno; M. Ogawa

doi:10.1103/PhysRevC.76.061301

Z dependence of the N=152 deformed shell gap: In-beam γ-ray spectroscopy of neutron-rich Pu245,246

H. Makii, T. Ishii, M. Asai, K. Tsukada, A. Toyoshima, M. Matsuda, A. Makishima, J. Kaneko, H. Toume, S. Ichikawa, S. Shigematsu, T. Kohno, M. Ogawa

Research output: Contribution to journal › Article

24 Citations (Scopus)

Abstract

We have measured in-beam γ rays in the neutron-rich 246Pu152 and 245Pu151 nuclei by means of Pu244(O18, O16)Pu246 and Pu244(O18, O17)Pu245 neutron transfer reactions, respectively. The γ rays emitted from Pu246 (Pu245) were identified by selecting the kinetic energy of scattered O16 (O17) detected by Si ΔE-E detectors. The ground-state band of Pu246 was established up to the 12+ state. We have found that the shell gap of N=152 is reduced in energy with decreasing atomic number by extending the systematics of the one-quasiparticle energies in N=151 nuclei into those in Pu245. This reduction of the shell gap clearly affects the 2+ energy of the ground-state band of Pu246.

Original language	English
Article number	061301
Journal	Physical Review C - Nuclear Physics
Volume	76
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevC.76.061301
Publication status	Published - Dec 3 2007
Externally published	Yes

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All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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Makii, H., Ishii, T., Asai, M., Tsukada, K., Toyoshima, A., Matsuda, M., ... Ogawa, M. (2007). Z dependence of the N=152 deformed shell gap: In-beam γ-ray spectroscopy of neutron-rich Pu245,246. Physical Review C - Nuclear Physics, 76(6), [061301]. https://doi.org/10.1103/PhysRevC.76.061301

Z dependence of the N=152 deformed shell gap : In-beam γ-ray spectroscopy of neutron-rich Pu245,246. / Makii, H.; Ishii, T.; Asai, M.; Tsukada, K.; Toyoshima, A.; Matsuda, M.; Makishima, A.; Kaneko, J.; Toume, H.; Ichikawa, S.; Shigematsu, S.; Kohno, T.; Ogawa, M.

In: Physical Review C - Nuclear Physics, Vol. 76, No. 6, 061301, 03.12.2007.

Research output: Contribution to journal › Article

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abstract = "We have measured in-beam γ rays in the neutron-rich 246Pu152 and 245Pu151 nuclei by means of Pu244(O18, O16)Pu246 and Pu244(O18, O17)Pu245 neutron transfer reactions, respectively. The γ rays emitted from Pu246 (Pu245) were identified by selecting the kinetic energy of scattered O16 (O17) detected by Si ΔE-E detectors. The ground-state band of Pu246 was established up to the 12+ state. We have found that the shell gap of N=152 is reduced in energy with decreasing atomic number by extending the systematics of the one-quasiparticle energies in N=151 nuclei into those in Pu245. This reduction of the shell gap clearly affects the 2+ energy of the ground-state band of Pu246.",

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AU - Ishii, T.

AU - Asai, M.

AU - Tsukada, K.

AU - Toyoshima, A.

AU - Matsuda, M.

AU - Makishima, A.

AU - Kaneko, J.

AU - Toume, H.

AU - Ichikawa, S.

AU - Shigematsu, S.

AU - Kohno, T.

AU - Ogawa, M.

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AB - We have measured in-beam γ rays in the neutron-rich 246Pu152 and 245Pu151 nuclei by means of Pu244(O18, O16)Pu246 and Pu244(O18, O17)Pu245 neutron transfer reactions, respectively. The γ rays emitted from Pu246 (Pu245) were identified by selecting the kinetic energy of scattered O16 (O17) detected by Si ΔE-E detectors. The ground-state band of Pu246 was established up to the 12+ state. We have found that the shell gap of N=152 is reduced in energy with decreasing atomic number by extending the systematics of the one-quasiparticle energies in N=151 nuclei into those in Pu245. This reduction of the shell gap clearly affects the 2+ energy of the ground-state band of Pu246.

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10.1103/PhysRevC.76.061301