Octupole deformation for Ba isotopes in a reflection-asymmetric relativistic mean-field approach

  • The potential energy surfaces of even-even 142—156Ba are investigated in the constrained reflection-asymmetric relativistic mean-field approach with parameter set PK1. It is shown that for the ground states, 142Ba is near spherical, 156Ba well quadrupole-deformed, and in between 144-154Ba octupole deformed. In particular, the nuclei 148,150Ba with N=92, 94 have the largest octupole deformations. By including the octupole degree of freedom, energy gaps N=88, N=94 and Z=56 near Fermi surfaces for the single-particle levels in 148Ba with β2~0.26 and β3~0.17 are found. Furthermore, the performance of the octupole deformation driving pairs (ν2f7/2, ν1i13/2) and (π2d5/2, π1h11/2) is demonstrated by analyzing the single-particle levels near Fermi surfaces in 148Ba.

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  • [1] Butler P A,Nazarewicz W.Rev.Mod.Phys.,1996,68:349[2] ZHU S J,Hamilton J H,Ramayya A V et al.J.Phys.G,1997,23:L77[3] LUO Y X,Rasmussen J O,Hamilton J H et al.Phys.Rev.C,2002,66:014305[4] Phillips W R,Ahmad I,Emling H et al.Phys.Rev.Lett.,1986,57:3257[5] ZHU S J,LU Q H,Hamilton J H et al.Phys.Lett.,1995,B357:273[6] ZHU S J,WANG M G,Hamilton J H et al.Chin.Phys.Lett.,1997,14(8):569[7] Urban W,Jones M A,Durell J L et al.Nucl.Phys.,1997,A613:107[8] ZHU L Y,ZHU S J,LI M et al.HEP NP,1998,22:885(in Chinese)[9] ZHU S J,Hamilton J H,Ramayya A V et al.Phys.Rev.C,1999,59:1316[10] Nazarewicz W,Tabor S L.Phys.Rev.C,1992,45:2226[11] Egido J L,Robledo L M.Nucl.Phys.,1992,A545:589[12] LIU Y X,SUN H Z,ZHAO E G.J.Phys.G,1994,20:1771[13] CHEN Y J,CHEN Y S,ZHU S J et al.Chin.Phys.Lett.,2005,22:1362[14] Ring P.Prog.Part.Nucl.Phys.,1996,37:193[15] Vretenar D,Afanasiev A V,Lalaziesis G A et al.Phys.Rep.,2005,409:101[16] MENG J,Told H,ZHOU S G et al.Prog.Part.Nucl.Phys.,2006,57:470[17] MENG J,Ring P.Phys.Rev.Lett.,1996,77:3963[18] MENG J,Ring P.Phys.Rev.Lett.,1998,80:460[19] Glendenning N K.Compact Stars.New York:Springer-Verlag,2000.1[20] GENG L S,MENG J,Told H.Chin.Phys.Lett.,2007,24:1865[21] WANG N,GUO L.Sci.China Ser.G,2009,52(10):1574[22] ZHANG W,LI Z P,ZHANG S Q,MENG J.Phys.Rev.C,2010,81:034302[23] Serot B D,Walecka J D.Adv.Nucl.Phys.,1986,16:1[24] Greiner W,Park J Y,Scheid W.Nuclear Moledules.Singapore:World Scientific,1994.1[25] Ring P,Schuck P.The Nuclear Many-body Problem.New York:Springer-Verlag,1980.1[26] LONG W H,MENG J,Giai N V et al.Phys.Rev.C,2004,69:034319[27] Audi G,Wapstra A H,Thibault C,Nucl.Phys.,2003,A729:337[28] Raman S,Nestor Jr.C W,Tikkanen P.At.Data Nucl.Data Tables,2001,78:1[29] Mller P,Nix J R,Myers W D et al.At.Data Nucl.Data Tables,1995,59:185
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ZHANG Wei, LI Zhi-Pan and ZHANG Shuang-Quan. Octupole deformation for Ba isotopes in a reflection-asymmetric relativistic mean-field approach[J]. Chinese Physics C, 2010, 34(8): 1094-1099. doi: 10.1088/1674-1137/34/8/011
ZHANG Wei, LI Zhi-Pan and ZHANG Shuang-Quan. Octupole deformation for Ba isotopes in a reflection-asymmetric relativistic mean-field approach[J]. Chinese Physics C, 2010, 34(8): 1094-1099.  doi: 10.1088/1674-1137/34/8/011 shu
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Received: 2010-03-01
Revised: 2010-03-19
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Octupole deformation for Ba isotopes in a reflection-asymmetric relativistic mean-field approach

    Corresponding author: ZHANG Shuang-Quan,

Abstract: 

The potential energy surfaces of even-even 142—156Ba are investigated in the constrained reflection-asymmetric relativistic mean-field approach with parameter set PK1. It is shown that for the ground states, 142Ba is near spherical, 156Ba well quadrupole-deformed, and in between 144-154Ba octupole deformed. In particular, the nuclei 148,150Ba with N=92, 94 have the largest octupole deformations. By including the octupole degree of freedom, energy gaps N=88, N=94 and Z=56 near Fermi surfaces for the single-particle levels in 148Ba with β2~0.26 and β3~0.17 are found. Furthermore, the performance of the octupole deformation driving pairs (ν2f7/2, ν1i13/2) and (π2d5/2, π1h11/2) is demonstrated by analyzing the single-particle levels near Fermi surfaces in 148Ba.

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