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1

Alpha Head on Collision with a Fixed Gold Nucleus, Taking into Account the Relativistic Rest Mass Variation as Implied by Mass-Energy Equivalence

100%

Yarman T., Arik M., Kholmetskii A., Altintas A., Ozaydin F.

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vol. 125

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issue 2

618-619

EN

We reformulate the Rutherford scattering of alpha particle for a head on collision, taking into account the rest mass variation of the particle, as implied by the energy conservation law. Our relativistic reformulation (which includes the energy conservation) constitutes a new example for the breakdown of the Lorentz invariance. Briefly speaking, even at rest or during the whole scattering process, the distance between the alpha particle and the gold nucleus is not invariant but depends on the frame of the observer attached to either object. According to our relativistic reformulation, we also provide a new set of Lorentz transformations.

2

IBM-2 calculations of some even-even selenium nuclei

80%

Türkan N., Olgun D., Uluer Ý.

Open Physics

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2006

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vol. 4

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issue 1

124-154

EN

In this study, we determined the most appropriate Hamiltonian that is needed for present calculations of nuclei in the A≅ 80 region by the view of interacting boson model (IBM-2). Using the best-fitted values of parameters in the Hamiltonian, we have calculated energy levels and B(E2) values for a number of transitions in some doubly even Se nuclei. The results were compared with the previous experimental and theoretical data and it is observed that they are in good agreement. The calculations have been extended to Se isotopes with A < 76 for which some B(E2) values are still not known.

3

Tensor Effects in Dipole Excitations at Finite Temperature

80%

Yüksel E., Bozkurt K.

Acta Physica Polonica A

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2013

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vol. 123

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issue 2

320-322

EN

Tensor effects in the dipole excitation of neutron-rich ^{68}Ni nucleus are investigated in the framework of Skyrme-Hartree-Fock plus random phase approximation at finite temperature. We calculate isovector giant and pygmy dipole strengths with finite temperature random phase approximation by using different tensor correlations. The effect of both tensor and finite temperature on the giant dipole resonance-pygmy dipole resonance energy region is analysed. Pygmy dipole resonance calculations with different proton-neutron tensor coupling constants are also compared with the experimental results.

4

Dependence of the Odd-Odd Nucleus ¹⁹⁶Au Level Density on the Parameters in Interacting Boson-Fermion-Fermion Model (IBFFM)

80%

Kabashi S., Bekteshi S., Ahmetaj S., Saramati B., Veliu V.

Acta Physica Polonica A

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2016

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vol. 130

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issue 1

122-125

EN

The odd-odd nuclei are characterized by a level density which is high already in the low-energy region. This case displays a full complexity of the interwoven shell-model and collective degrees of freedom and thus provides an interesting testing ground for the pattern of nuclear level density. The level density of the odd-odd nucleus ¹⁹⁶Au is investigated in the interacting boson-fermion-fermion model which accounts for collectivity and complex interaction between quasiparticle and collective modes. In the present work, the IBFFM pattern of total and parametric dependent level densities is investigated and compared to the pattern found in previous investigations in the framework of combinatorial, thermodynamic and spectral distribution approaches.

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3 Acta Physica Polonica A

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1 Ahmetaj S.

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1 Arik M.

1 Bekteshi S.

1 Bozkurt K.

1 Kabashi S.

1 Kholmetskii A.

1 Olgun D.

1 Ozaydin F.

1 Saramati B.

1 Türkan N.

1 Uluer Ý.

1 Veliu V.

1 Yarman T.

1 Yüksel E.

Alpha Head on Collision with a Fixed Gold Nucleus, Taking into Account the Relativistic Rest Mass Variation as Implied by Mass-Energy Equivalence

IBM-2 calculations of some even-even selenium nuclei

Tensor Effects in Dipole Excitations at Finite Temperature

Dependence of the Odd-Odd Nucleus ¹⁹⁶Au Level Density on the Parameters in Interacting Boson-Fermion-Fermion Model (IBFFM)