A Group-Chain Check on the Proton-Neutron Interacting Boson Model Computer Code NPBOS

Long Guilu; Sun Hongzhou

Chinese Physics C> 1989, Vol. 13> Issue(S3) : 313-320

A Group-Chain Check on the Proton-Neutron Interacting Boson Model Computer Code NPBOS

Long Guilu ¹ ,
Sun Hongzhou ²

1. Department of Physics, Tsinghua University, Beijing;
2. Department of Physics, Tsinghua University, Beijing;Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing

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Abstract：
In view of the proton boson and neutron boson coupling, all possible dynamical symmetries in the proton-neutron interacting boson model (IBM2) are discussed. The symmetries are found to be in four types, of which some are newly discovered. The commonly used IBM2 computer code NPBOS is checked through the group-chain method. It shows that most results of the NPBOS calculations are correct except the case in which O_x·O_x and O_v·O_v are included in the Hamiltonian. Using a modified NPBOS,the energy levels and E2 transitions of ¹⁵⁰Sm and ¹⁵²Sm are studied.

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Long Guilu and Sun Hongzhou. A Group-Chain Check on the Proton-Neutron Interacting Boson Model Computer Code NPBOS[J]. Chinese Physics C, 1989, 13(S3): 313-320.

Long Guilu and Sun Hongzhou. A Group-Chain Check on the Proton-Neutron Interacting Boson Model Computer Code NPBOS[J]. Chinese Physics C, 1989, 13(S3): 313-320. shu

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Received: 1988-04-28

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Project Supported in part by the Junior Scientist Foundation of China.

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沈阳化工大学材料科学与工程学院沈阳 110142

A Group-Chain Check on the Proton-Neutron Interacting Boson Model Computer Code NPBOS

Long Guilu ^1,
Sun Hongzhou ^2,

1. Department of Physics, Tsinghua University, Beijing;
2. Department of Physics, Tsinghua University, Beijing;Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing

Received Date: 1988-04-28

Fund Project: Project Supported in part by the Junior Scientist Foundation of China.

Abstract: In view of the proton boson and neutron boson coupling, all possible dynamical symmetries in the proton-neutron interacting boson model (IBM2) are discussed. The symmetries are found to be in four types, of which some are newly discovered. The commonly used IBM2 computer code NPBOS is checked through the group-chain method. It shows that most results of the NPBOS calculations are correct except the case in which O_x·O_x and O_v·O_v are included in the Hamiltonian. Using a modified NPBOS,the energy levels and E2 transitions of ¹⁵⁰Sm and ¹⁵²Sm are studied.