کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9851209 | 1527287 | 2005 | 20 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Momentum and density dependence of the isospin part of nuclear mean field and equation of state of asymmetric nuclear matter
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
فیزیک و نجوم
فیزیک هسته ای و انرژی بالا
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چکیده انگلیسی
Momentum and density dependence of the isospin part of nuclear mean field uÏ(k,Ï) which is still, in part, the open problem of the old Lane potential is analysed using density dependent finite range effective interactions. The behaviour of uÏ(k=kf,Ï) around the Fermi momentum kf is found to be related to the density dependence of nuclear symmetry energy JÏ(Ï) and nucleon effective mass Mâ(k=kf,Ï)/M in symmetric nuclear matter. The momentum dependence of uÏ(k,Ï) is separated out in terms of a simple functional uÏex(k,Ï) which vanishes at k=kf and involves only the finite range parts of the exchange interactions between pairs of like and unlike nucleons. Depending on the choice of the parameters of these exchange interactions two conflicting trends of momentum dependence are noticed which lead to two opposite types of splitting of neutron and proton effective masses. The equation of state of asymmetric nuclear matter and the high density behaviour of nuclear symmetry energy JÏ(Ï) are studied by constraining the additional parameters involved on the basis that pure neutron matter should not be predicted to be bound by any reasonable nuclear interaction. Emphasis is also given on the need of experimental data sensitive to the differences between neutron and proton transport properties in highly asymmetric dense nuclear matter and its analysis to constrain the high density behaviour of nuclear symmetry energy as well as to resolve the controversy on the two opposite types of splitting of neutron and proton effective masses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Physics A - Volume 753, Issues 3â4, 16 May 2005, Pages 367-386
Journal: Nuclear Physics A - Volume 753, Issues 3â4, 16 May 2005, Pages 367-386
نویسندگان
B. Behera, T.R. Routray, A. Pradhan, S.K. Patra, P.K. Sahu,