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 › peer-review

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

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1103/PhysRevC.76.061301

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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 › peer-review

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

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.",

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

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T2 - In-beam γ-ray spectroscopy of neutron-rich Pu245,246

AU - Makii, H.

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.

PY - 2007/12/3

Y1 - 2007/12/3

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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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