Статья

Evolution of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>N</mml:mi><mml:mo>=</mml:mo><mml:mn>50</mml:mn></mml:math>Shell Gap Energy towards<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mmultiscripts><mml:mi>Ni</mml:mi><mml:mprescripts/><mml:none/><mml:mn>78</mml:mn></mml:mmultiscripts></mml:math>

J. HakalaDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, FinlandS. RahamanDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, FinlandV.-V. ElomaaDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, FinlandT. EronenDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, FinlandU. HagerDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, FinlandA. JokinenDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, FinlandA. KankainenDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, FinlandI. D. MooreDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, FinlandH. PenttiläDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, FinlandS. Rinta-AntilaDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, FinlandJ. RissanenDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, FinlandA. SaastamoinenDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, FinlandT. SonodaDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, FinlandC. WeberDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, FinlandJ. ÄystöDepartment of Physics, P.O. Box 35 (YFL), FI-40014 University of Jyväskylä, Finland

2008lv

ABI

Аннотация

Atomic masses of the neutron-rich isotopes $^{76--80}\mathrm{Zn}$, $^{78--83}\mathrm{Ga}$, $^{80--85}\mathrm{Ge}$, $^{81--87}\mathrm{As}$, and $^{84--89}\mathrm{Se}$ have been measured with high precision using the Penning trap mass spectrometer JYFLTRAP at the IGISOL facility. The masses of $^{82,83}\mathrm{Ga}$, $^{83--85}\mathrm{Ge}$, $^{84--87}\mathrm{As}$, and $^{89}\mathrm{Se}$ were measured for the first time. These new data represent a major improvement in the knowledge of the masses in this neutron-rich region. Two-neutron separation energies provide evidence for the reduction of the $N=50$ shell gap energy towards germanium ($Z=32$) and a subsequent increase at gallium ($Z=31$). The data are compared with a number of theoretical models. An indication of the persistent rigidity of the shell gap towards nickel ($Z=28$) is obtained.

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Идентификаторы

DOI: 10.1103/physrevlett.101.052502

Цитирования и источники

Цитирований: 2Использованных источников: 0

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