Nanosecond isomers in neutron-rich 67Cu and 64Co and a fast E3 transition in 67Cu

M. Asai; T. Ishii; A. Makishima; I. Hossain; M. Ogawa; S. Ichikawa

Nanosecond isomers in neutron-rich ⁶⁷Cu and ⁶⁴Co and a fast E3 transition in ⁶⁷Cu

M. Asai, T. Ishii, A. Makishima, I. Hossain, M. Ogawa, S. Ichikawa

Research output: Contribution to journal › Article › peer-review

Abstract

Gamma-ray cascades from nanosecond isomers in neutron-rich nuclei ₆₇Cu and ⁶⁴Co have been observed through heavy-ion deep-inelastic collisions of ¹⁹⁸Pt+ ⁷⁶Ge (8 MeV/nucleon) using an isomer-scope. In ⁶⁷Cu, an isomeric state at 3464 keV and its decay scheme have been established. The isomeric transition is a hindered M 1 transition between the 15/2⁺ and the 13/2⁺ states with main components of (πp_3/2vg_9/2vf^-1_5/2) _15/2+ and (πp_3/2vg_9/2vp_1/2)_13/2+, respectively. A fast E3 transition between the πg_9/2 and the πp_3/2 single-particle states indicates strong particle-octupole vibration coupling in ⁶⁷Cu. An isomeric state at 834 keV with T_1/2 = 6.4(3) ns has been identified in ⁶⁴Co. Proton-neutron configurations of the levels established in ⁶⁴Co are discussed.

Original language	English
Article number	054313
Pages (from-to)	543131-543137
Number of pages	7
Journal	Physical Review C - Nuclear Physics
Volume	62
Issue number	5
Publication status	Published - Nov 2000
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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title = "Nanosecond isomers in neutron-rich 67Cu and 64Co and a fast E3 transition in 67Cu",

abstract = "Gamma-ray cascades from nanosecond isomers in neutron-rich nuclei 67Cu and 64Co have been observed through heavy-ion deep-inelastic collisions of 198Pt+ 76Ge (8 MeV/nucleon) using an isomer-scope. In 67Cu, an isomeric state at 3464 keV and its decay scheme have been established. The isomeric transition is a hindered M 1 transition between the 15/2+ and the 13/2+ states with main components of (πp3/2vg9/2vf-15/2) 15/2+ and (πp3/2vg9/2vp1/2)13/2+, respectively. A fast E3 transition between the πg9/2 and the πp3/2 single-particle states indicates strong particle-octupole vibration coupling in 67Cu. An isomeric state at 834 keV with T1/2 = 6.4(3) ns has been identified in 64Co. Proton-neutron configurations of the levels established in 64Co are discussed.",

author = "M. Asai and T. Ishii and A. Makishima and I. Hossain and M. Ogawa and S. Ichikawa",

year = "2000",

month = nov,

language = "English",

volume = "62",

pages = "543131--543137",

journal = "Physical Review C - Nuclear Physics",

issn = "0556-2813",

publisher = "American Physical Society",

number = "5",

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TY - JOUR

T1 - Nanosecond isomers in neutron-rich 67Cu and 64Co and a fast E3 transition in 67Cu

AU - Asai, M.

AU - Ishii, T.

AU - Makishima, A.

AU - Hossain, I.

AU - Ogawa, M.

AU - Ichikawa, S.

PY - 2000/11

Y1 - 2000/11

N2 - Gamma-ray cascades from nanosecond isomers in neutron-rich nuclei 67Cu and 64Co have been observed through heavy-ion deep-inelastic collisions of 198Pt+ 76Ge (8 MeV/nucleon) using an isomer-scope. In 67Cu, an isomeric state at 3464 keV and its decay scheme have been established. The isomeric transition is a hindered M 1 transition between the 15/2+ and the 13/2+ states with main components of (πp3/2vg9/2vf-15/2) 15/2+ and (πp3/2vg9/2vp1/2)13/2+, respectively. A fast E3 transition between the πg9/2 and the πp3/2 single-particle states indicates strong particle-octupole vibration coupling in 67Cu. An isomeric state at 834 keV with T1/2 = 6.4(3) ns has been identified in 64Co. Proton-neutron configurations of the levels established in 64Co are discussed.

AB - Gamma-ray cascades from nanosecond isomers in neutron-rich nuclei 67Cu and 64Co have been observed through heavy-ion deep-inelastic collisions of 198Pt+ 76Ge (8 MeV/nucleon) using an isomer-scope. In 67Cu, an isomeric state at 3464 keV and its decay scheme have been established. The isomeric transition is a hindered M 1 transition between the 15/2+ and the 13/2+ states with main components of (πp3/2vg9/2vf-15/2) 15/2+ and (πp3/2vg9/2vp1/2)13/2+, respectively. A fast E3 transition between the πg9/2 and the πp3/2 single-particle states indicates strong particle-octupole vibration coupling in 67Cu. An isomeric state at 834 keV with T1/2 = 6.4(3) ns has been identified in 64Co. Proton-neutron configurations of the levels established in 64Co are discussed.

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VL - 62

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EP - 543137

JO - Physical Review C - Nuclear Physics

JF - Physical Review C - Nuclear Physics

SN - 0556-2813

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M1 - 054313

ER -

Nanosecond isomers in neutron-rich ⁶⁷Cu and ⁶⁴Co and a fast E3 transition in ⁶⁷Cu

Abstract

All Science Journal Classification (ASJC) codes

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