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Abstrak :
[ABSTRAK
Di permukaan bintang neutron, perubahan kerapatan partikel yang signikan dapat menghasilkan separasi muatan dalam bentuk lapisan dipol listrik. Pada penelitian ini dipelajari efek medan listrik akibat lapisan tersebut terhadap properti dari bintang neutron. Untuk memodelkan kerapatan lapisan dipol listrik, kami menggunakan dua fungsi Gaussian. Pada perhitungan ini kami gunakan dua model dengan asumsi berbeda, yakni: model dengan asumsi bahwa bintang neutron hanya tersusun atas p, n, e dan  serta model dengan asumsi bintang neutron tersusun dari p, n, e,  dan hyperon. Hasil yang diperoleh menunjukkan bahwa massa maksimum tidak sensitif terhadap medan listrik di permukaan, tetapi radius bintang dengan massa kanonik 1:4Mb cukup sensitif terhadap medan listrik. Bintang neutron dengan hyperon bersifat lebih soft dibandingkan bintang neutron tanpa hyperon

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ABSTRACT
On the surface of a neutron star, a signicant particle density changes can produce charge separation in the form electric dipole layer. This research studied electric eld eect from the dipole layer on the properties of neutron star. For modeling electric dipole layer density, we use two Gaussian functions. We use two models with dierent assumptions: namely a model which assumes the neutron star is only composed of p, n, e and  and a model which assumes the neutron star is composed of p, n, e,  and hyperon. The result showes that the maximum mass is not sensitive to the electric elds on the surface, but the radius of star with canonical mass 1:4Mb is quite sensitive to electric elds. The neutron star with hyperon is softer than without hyperon;On the surface of a neutron star, a signicant particle density changes can produce charge separation in the form electric dipole layer. This research studied electric eld eect from the dipole layer on the properties of neutron star. For modeling electric dipole layer density, we use two Gaussian functions. We use two models with dierent assumptions: namely a model which assumes the neutron star is only composed of p, n, e and  and a model which assumes the neutron star is composed of p, n, e,  and hyperon. The result showes that the maximum mass is not sensitive to the electric elds on the surface, but the radius of star with canonical mass 1:4Mb is quite sensitive to electric elds. The neutron star with hyperon is softer than without hyperon, On the surface of a neutron star, a signicant particle density changes can produce charge separation in the form electric dipole layer. This research studied electric eld eect from the dipole layer on the properties of neutron star. For modeling electric dipole layer density, we use two Gaussian functions. We use two models with dierent assumptions: namely a model which assumes the neutron star is only composed of p, n, e and  and a model which assumes the neutron star is composed of p, n, e,  and hyperon. The result showes that the maximum mass is not sensitive to the electric elds on the surface, but the radius of star with canonical mass 1:4Mb is quite sensitive to electric elds. The neutron star with hyperon is softer than without hyperon]

Abstrak :
[ABSTRAK
Pengaruh dari kopling tensor, isovektor-isoskalar dan pertukaran elektromagnetik terhadap inti berat dan prediksi inti super berat dipelajari melalui teori Relativistic Mean Field (RMF). Ditemukan bahwa ketiga kopling tersebut memberikan penga- ruh yang signikan terhadap sifat materi nuklir, energi ikat, spektrum energi partikel tunggal, distribusi kerapatan dan ketebalan kulit inti berat dan prediksi inti super berat. Hasil Penelitian ini menunjukan bahwa 208Pb dan 292120 adalah double ma- gic nuclei. hasil ini konsisten dengan data eksperimen dan prediksi model RMF, sedangkan hasil utama penelitian ini nememukan bahwa 276U adalah double magic nuclei.ABSTRACT We studied the eect of tensor, isovektor-isoskalar and electromagnetic exchange couplings on heavy and prediction of superheavy nuclei by using RMF model. We have found that those couplings signicantly in uence the nuclear matter properties, binding energy, single particle spectra, nucleon densities and neutron skin of heavy and superheavy nuclei. Our result show that 208Pb and 292120 are double magic nuclei. This results are consistent with experimental nding and other RMF model prediction, while our main result is 276U is also double magic nuclei.;We studied the eect of tensor, isovektor-isoskalar and electromagnetic exchange couplings on heavy and prediction of superheavy nuclei by using RMF model. We have found that those couplings signicantly in uence the nuclear matter properties, binding energy, single particle spectra, nucleon densities and neutron skin of heavy and superheavy nuclei. Our result show that 208Pb and 292120 are double magic nuclei. This results are consistent with experimental nding and other RMF model prediction, while our main result is 276U is also double magic nuclei.;We studied the eect of tensor, isovektor-isoskalar and electromagnetic exchange couplings on heavy and prediction of superheavy nuclei by using RMF model. We have found that those couplings signicantly in uence the nuclear matter properties, binding energy, single particle spectra, nucleon densities and neutron skin of heavy and superheavy nuclei. Our result show that 208Pb and 292120 are double magic nuclei. This results are consistent with experimental nding and other RMF model prediction, while our main result is 276U is also double magic nuclei., We studied the eect of tensor, isovektor-isoskalar and electromagnetic exchange couplings on heavy and prediction of superheavy nuclei by using RMF model. We have found that those couplings signicantly in uence the nuclear matter properties, binding energy, single particle spectra, nucleon densities and neutron skin of heavy and superheavy nuclei. Our result show that 208Pb and 292120 are double magic nuclei. This results are consistent with experimental nding and other RMF model prediction, while our main result is 276U is also double magic nuclei.]