'Safe' Coulomb Excitation of {sup 30}Mg
We report on the first radioactive beam experiment performed at the recently commissioned REX-ISOLDE facility at CERN in conjunction with the highly efficient {gamma} spectrometer MINIBALL. Using {sup 30}Mg ions accelerated to an energy of 2.25 MeV/u together with a thin {sup nat}Ni target, Coulomb...
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| Veröffentlicht in: | Physical review letters 2005-05, Vol.94 (17) |
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| creator | Niedermaier, O. Scheit, H. Bildstein, V. Boie, H. Fitting, J. Hahn, R. von Koeck, F. Lauer, M. Pal, U.K. Podlech, H. Repnow, R. Schwalm, D. Alvarez, C. Ames, F. Bollen, G. Emhofer, S. Habs, D. Kester, O. Lutter, R. Rudolph, K. |
| description | We report on the first radioactive beam experiment performed at the recently commissioned REX-ISOLDE facility at CERN in conjunction with the highly efficient {gamma} spectrometer MINIBALL. Using {sup 30}Mg ions accelerated to an energy of 2.25 MeV/u together with a thin {sup nat}Ni target, Coulomb excitation of the first excited 2{sup +} states of the projectile and target nuclei well below the Coulomb barrier was observed. From the measured relative deexcitation {gamma}-ray yields the B(E2;0{sub gs}{sup +}{yields}2{sub 1}{sup +}) value of {sup 30}Mg was determined to be 241(31)e{sup 2} fm{sup 4}. Our result is lower than values obtained at projectile fragmentation facilities using the intermediate-energy Coulomb excitation method, and confirms the theoretical conjecture that the neutron-rich magnesium isotope {sup 30}Mg resides outside the 'island of inversion'. |
| doi_str_mv | 10.1103/PhysRevLett.94.172501 |
| format | Article |
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Using {sup 30}Mg ions accelerated to an energy of 2.25 MeV/u together with a thin {sup nat}Ni target, Coulomb excitation of the first excited 2{sup +} states of the projectile and target nuclei well below the Coulomb barrier was observed. From the measured relative deexcitation {gamma}-ray yields the B(E2;0{sub gs}{sup +}{yields}2{sub 1}{sup +}) value of {sup 30}Mg was determined to be 241(31)e{sup 2} fm{sup 4}. 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Using {sup 30}Mg ions accelerated to an energy of 2.25 MeV/u together with a thin {sup nat}Ni target, Coulomb excitation of the first excited 2{sup +} states of the projectile and target nuclei well below the Coulomb barrier was observed. From the measured relative deexcitation {gamma}-ray yields the B(E2;0{sub gs}{sup +}{yields}2{sub 1}{sup +}) value of {sup 30}Mg was determined to be 241(31)e{sup 2} fm{sup 4}. 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Using {sup 30}Mg ions accelerated to an energy of 2.25 MeV/u together with a thin {sup nat}Ni target, Coulomb excitation of the first excited 2{sup +} states of the projectile and target nuclei well below the Coulomb barrier was observed. From the measured relative deexcitation {gamma}-ray yields the B(E2;0{sub gs}{sup +}{yields}2{sub 1}{sup +}) value of {sup 30}Mg was determined to be 241(31)e{sup 2} fm{sup 4}. Our result is lower than values obtained at projectile fragmentation facilities using the intermediate-energy Coulomb excitation method, and confirms the theoretical conjecture that the neutron-rich magnesium isotope {sup 30}Mg resides outside the 'island of inversion'.</abstract><cop>United States</cop><doi>10.1103/PhysRevLett.94.172501</doi></addata></record> |
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| ispartof | Physical review letters, 2005-05, Vol.94 (17) |
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| source | American Physical Society Journals |
| subjects | CERN COULOMB EXCITATION COULOMB FIELD EXCITED STATES GAMMA RADIATION GAMMA SPECTROMETERS HEAVY ION REACTIONS MAGNESIUM 30 MAGNESIUM IONS MEV RANGE 01-10 NEUTRONS NUCLEAR PHYSICS AND RADIATION PHYSICS |
| title | 'Safe' Coulomb Excitation of {sup 30}Mg |
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