cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Asril Pramutadi Andi Mustari
Contact Email
IJPhysicsITB@gmail.com
Phone
+6222-2500834
Journal Mail Official
ijp-journal@itb.ac.id
Editorial Address
Prodi Sarjana dan Pascasarjana Fisika Fakultas Matematika dan Ilmu Pengetahuan Alam Institut Teknologi Bandung Gedung Fisika, Jalan Ganesa 10, Bandung 40132, INDONESIA
Location
Kota bandung,
Jawa barat
INDONESIA
Indonesian Journal of Physics (IJP)
Published by Institut Teknologi Bandung
ISSN : 23018151     EISSN : 29870828     DOI : https://doi.org/10.5614/itb.ijp
Core Subject : Science, Engineering,
Astronomy Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering
Indonesian Journal of Physics welcomes full research articles in the area of Sciences and Engineering from the following subject areas: Physics, Mathematics, Astronomy, Mechanical Engineering, Civil and Structural Engineering, Chemical Engineering, Electrical Engineering, Geotechnical Engineering, Engineering Science, Environmental Science, Materials Science, and Earth-Surface Processes. Authors are invited to submit articles that have not been published previously and are not under consideration elsewhere.
Arjuna Subject : Fisika dan Astronomi - Fisika Nuklir dan Molekuler, dan Ooptik
Articles 334 Documents
 29   30   31   32   33 
Thermoelectrics of type-I and type-II nodal line semimetals within the two-band model Jyesta Mahayu Adhidewata; Ahmad R. T. Nugraha; Eddwi Hesky Hasdeo; Bobby Eka Gunara
Indonesian Journal of Physics Vol 33 No 1 (2022): Vol 33 No 1 (2022)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (759.204 KB) | DOI: 10.5614/itb.ijp.2022.33.1.6

Abstract

Metals and semimetals are often considered poor thermoelectric (TE) materials due to their lowSeebeck coefficients. However, we will show that topological semimetals in the class of nodal-linesemimetals (NLSs) may potentially exhibit better performance as TE materials. The NLSs are semimetalswith an intersection between the conduction band and valence band in the forms of a line (thus called thenodal line). We construct a two-band model using an almost-linear conduction and parabolic (or Mexicanhat) valence bands that overlap each other near the band edge to represent a type-I (or type-II) NLS. Wecalculate TE properties of the NLSs using the semiclassical Boltzmann transport theory and the relaxationtime approximation. By varying the band parameters in our model, we find that the type-II NLS generallyhas better TE performance than the type-I NLS. The type-II NLS, in particular, possesses a Seebeckcoefficient with a value possibly larger than twice that of normal metals. The origin of this feature mightbe the presence of a discontinuity in the density of states due to the intersection of the valence andconduction bands.
Gravitational Wave Propagation for The Generalized Proca Theories marliana lutan; Agustina Widiyani; Azwar Sutiono; Getbogi Hikmawan; Agus Suroso; Freddy Permana Zen
Indonesian Journal of Physics Vol 33 No 1 (2022): Vol 33 No 1 (2022)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (177.093 KB) | DOI: 10.5614/itb.ijp.2022.33.1.7

Abstract

In general relativity, a gravitational wave propagates with the speed of light, but inthe alternative theories of gravity, propagation speed could deviate from the speed of lightdue to the modification of gravity. Gravitational waves are influenced by modified gravityduring propagation at the cosmological distance. In this paper, we investigate thepropagation of a gravitational wave of the generalized Proca theories by consideringgravitational wave as the gravitational field propagates in spacetime as a wave perturbing flatspacetime. We show that the arbitrary functions G3, G4, and G5 can be the sources ofdeviation of the speed of the gravitational wave.
An Interacting Dark Energy Model with Nonminimal Derivative Coupling in the Parameterized Post-Friedmannian Framework Agustina Widiyani; Azwar Sutiono
Indonesian Journal of Physics Vol 33 No 2 (2022): Vol 33 No 2 (2022)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (312.321 KB) | DOI: 10.5614/itb.ijp.2022.33.2.1

Abstract

We investigation the parameterization of the cosmological model with the nonminimal derivative coupling of a scalar field where gravity is coupled nonminimally with the derivatives of dark energy components in the form of a scalar field. We follow the parameterized post-Friedmannian approach for the interacting dark energy theories. We show how the big number of free functions can be reduced by limiting certain assumptions to a few non-zero coefficients. We only consider the case that the dark sector contains at most second order in time derivatives of the metric and scalar fields. In this paper, we demonstrate their use through an example of the dark sector interactions model and classify them according to the current literature.
Alpha Decay Half-Lives Calculation of Even-Even Nuclei in the62≤Z≤100Region using Woods-Saxon Potential rizal kurniadi; Chumaira Ramadani
Indonesian Journal of Physics Vol 33 No 2 (2022): Vol 33 No 2 (2022)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (430.137 KB) | DOI: 10.5614/itb.ijp.2022.33.2.4

Abstract

Alpha decay properties of even-even nuclei in the 62 ≤ Z ≤ 100 region are investigated within the Unified Fission Model based on a Modified Woods-Saxon potential. The computed alpha decay half-lives are compared to experimental data and are found to be in good agreement with it. The acquired pattern of the variation of alpha decay half-lives as a function of neutron number are explained by the nuclear shell effect. The experimental alpha decay energy Q is found to have an inverse relation with the alpha decay half-lives. This work has shown that the Unified Fission Model based on a Modified Woods-Saxon potential is sufficient to obtain the values of alpha decay half-lives.
Skyrme-Hartree-Fock on Deformed Nucleus for the Island of Inversion Case rizal kurniadi
Indonesian Journal of Physics Vol 33 No 2 (2022): Vol 33 No 2 (2022)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (237.835 KB) | DOI: 10.5614/itb.ijp.2022.33.2.3

Abstract

The Island of Inversion is a state where the energy levels are not in a standard order. As a result, it will affect the calculation of several other physical quantities. One of those affected is the calculation of the radius of the nuclear charge. For this reason, this paper will present the analysis of the radius of the nucleus charge using the Skrme Hartree Fock method on a deformed nucleus. Through deformation effects, especially the quadruple effect, it is expected that the radius of the nuclear charge will increase. In this paper, we will present the calculation of the nucleus radius using the SHF deformed nucleus method and compare it with the SHF for the ground state nucleus. The calculation results show that this method can adequately handle the island of the inversion effect.
Modified Boltzmann Factor on Rupture Probability rizal kurniadi
Indonesian Journal of Physics Vol 33 No 2 (2022): Vol 33 No 2 (2022)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (194.824 KB) | DOI: 10.5614/itb.ijp.2022.33.2.2

Abstract

Fission Products are data that is very much needed for developing nuclear technology. Considering that the experimental results of nuclear data are minimal, theoretical modeling and calculations are needed. One of the theoretical models is the "multimodal random neck-rupture model. (M-RNRM)" However, although it has completed the fission product data, it needs closer to the reference value. For this reason, the idea of modifying the Boltzmann factor on rupture probability was developed. This modification is in the form of adding a polynomial factor to the Boltzmann factor. This work has succeeded in showing better fission product calculation results closer to the reference value.
Application of The Computational Semi-Empirical Method in Calculating The Fission Yield with Reference to The JENDL Data rizal kurniadi
Indonesian Journal of Physics Vol 33 No 2 (2022): Vol 33 No 2 (2022)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (607.526 KB) | DOI: 10.5614/itb.ijp.2022.33.2.5

Abstract

Fission Yield calculation techniques can be completed in various ways. In this work, other calculation techniques will be described. Namely, a semi-empirical technique that utilizes random numbers. This semi-empirical method can produce fitting parameters to obtain other physical quantities. Because it uses a random number initiator, computations can be completed in parallel. Therefore, the computation time is shorter. This paper will show in sequence the steps of this technique. The calculation begins by assigning a value to the incident energy and random position of the nucleons, and then ends after fission products occur. This paper only describes the process of calculating the Fission Yield for several U isotopes.
Optimalisasi Struktur Sel Surya GaAs Sambungan p-n dengan Lapisan Antirefleksi yang tergandeng dengan Lapisan Window AlGaAs Andi Suhandi; pepen Arifin
Indonesian Journal of Physics Vol 14 No 2 (2003): Vol. 14 No.2, April 2003
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Telah dilakukan proses optimalisasi struktur sel surya GaAs sambungan p-n melalui perhitungan secara analitik, dengan variabel perhitungan meliputi makeup divais seperti ketebalan lapisan-lapisan semikonduktor dan konsentrasi doping ketakmurnian, serta parameter parameter divais seperti waktu hidup pembawa muatan minoritas, koefis'en difusi pembawa muatan minoritas, dan laju rekombinasi permukaan. Parameter-parameter divais telah diambil dari data-data hasil eksperimen, hasil simulasi, maupun dari hasil kajian teoretik. Kehadiran lapisan anti refleksi yang tergandeng dengan lapisan window AlGaAs dalam perhitungan ini diwakili dengan nilai transmisivitasnya. Kriteria struktur sel surya optimum ditentukan berdasarkan tingkat pencapaian rapat photocurrent yang optimum.Hasil perhitungan menunjukkan bahwa kehadiran lapisan anti refleksi yang tergandeng dengan lapisan window AIGaAs dapat meningkatkan rapat photocurrent yang dapat dibangkitkan sel surya GaAs secara signifkan. Dibanding dengan bahan lapisan anti refleksi lain, sistem MgFWnS dapat membangkitkan rapat photocurrent paling besar jika dipasang pada sel surya GaAs. Struktur optimum sel surya GaAs terjadi ketika bahan lapisan anti refleksi terbuat dari MgFyZnS, ketebalan lapisan window (AIGaAs) sebesar 20 nm, ketebalan lapisan tipe-p dan tipe-n berturut-turut sekitar 1,5 fan dan 3,5 fan, serta konsentrasi doping akseptor di tipep (N,4) dan konsentrasi doping donor di tipe-n (ND) berturut-turut sekitar 1 x 1018 cm-j, dan 1 x 10" cm-3 . Dengan struktur seperti itu dapat dibangkitkan rapat photocurrent optimum sekitar 46,5 mAlcm2 .
Generation of spin polarization in a multibarrier structure Berlinson Dominikus Napitu
Indonesian Journal of Physics Vol 34 No 1 (2023): vol 34 no 1 2023
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itb.ijp.2023.34.1.2

Abstract

The possibility to induce polarized transmission is investigated in a system of multibarrier magnetic junction. In the undeformed system, the transmission is shown to depend on the incident energy but almost independent of inhomogeneity of potential barrier. A proper selection of incident energy is found sufficient to control both direction and strength of spin polarization. When deformation of momentum wave-vector is introduced, the spin polarization does not only change its dependence on energy but also its intensity. This provides evidence that besides energy, deformation of momentum wave vector could also influence and be used to drive spin of the transmitted current; gaining further control on both direction and intensity. A short survey on the role of local magnetic splitting, ordering of local magnetic field on the spin polarization is also given.
Total Kinetic Energy of Fission Fragments based on Fission Product Data rizal kurniadi
Indonesian Journal of Physics Vol 34 No 1 (2023): vol 34 no 1 2023
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/itb.ijp.2023.34.1.1

Abstract

Total kinetic energy (TKE) is the physical quantity that must be acquired during a nuclear fission reaction. This energy is used for various purposes, primarily to determine the spectrum of the second proton. This spectrum is advantageous in the design of nuclear reactors. Various techniques for calculating TKE, from microscopic to macroscopic, have been carried out, from statistical to quantum reviews. This whole technique is solely for obtaining TKE accurately. This paper will review the TKE calculation based on the fission products' experimental results. This fission product data can be in the form of raw experimental data or evaluated data. The calculations are carried out within a macroscopic and statistical review framework. The macroscopic view is a liquid drop model, while the statistics use the random number technique. Because the liquid drop model and the random number technique are very standard, this paper does not review them.

Page 31 of 34 | Total Record : 334

 29   30   31   32   33 

Filter by Year

2001 2025


Reset
Filter By Issues
All Issue Vol 36 No 1 (2025): Vol 36 No 1 2025 Vol 35 No 2 (2024): Vol 35 No 2 2024 Vol 35 No 1 (2024): vol 35 no 1 2024 Vol 34 No 2 (2023): vol 34 no 2 2023 Vol 34 No 1 (2023): vol 34 no 1 2023 Vol 33 No 2 (2022): Vol 33 No 2 (2022) Vol 33 No 1 (2022): Vol 33 No 1 (2022) Vol 32 No 2 (2021): Vol 32 No 2 (2021) Vol 32 No 1 (2021): Vol 32 No 1 (2021) Vol 31 No 2 (2020): Vol 31 No 2 (2020) Vol 31 No 1 (2020): Vol 31 No 1 (2020) Vol 30 No 2 (2019): Vol 30 No 2 (2019) Vol 30 No 1 (2019): Vol 30 No 1 (2019) Vol 27 No 1 (2016): Vol 27 No 1 (2016), July 2016 Vol 26 No 2 (2015): Vol. 26 No. 2, December 2015 Vol 26 No 1 (2015): Vol. 26 No. 1, July 2015 Vol 23 No 1 (2012): Vol. 23 No. 1, July 2012 Vol 22 No 4 (2011): Vol. 22 No. 4, October 2011 Vol 22 No 3 (2011): Vol. 22 No. 3, July 2011 Vol 22 No 2 (2011): Vol. 22 No. 2, April 2011 Vol 22 No 1 (2011): Vol. 22 No. 1, January 2011 Vol 21 No 4 (2010): Vol. 21 No. 4, October 2010 Vol 21 No 3 (2010): Vol. 21 No. 3, July 2010 Vol 21 No 2 (2010): Vol. 21 No. 2, April 2010 Vol 21 No 1 (2010): Vol. 21 No. 1, January 2010 Vol 20 No 4 (2009): Vol. 20 No. 4, October 2009 Vol 20 No 3 (2009): Vol. 20 No. 3, July 2009 Vol 20 No 2 (2009): Vol. 20 No. 2, April 2009 Vol 20 No 1 (2009): Vol. 20 No. 1, January 2009 Vol 19 No 4 (2008): Vol. 19 No. 4, October 2008 Vol 19 No 3 (2008): Vol. 19 No. 3, July 2008 Vol 19 No 2 (2008): Vol. 19 No. 2, April 2008 Vol 19 No 1 (2008): Vol. 19 No. 1, January 2008 Vol 18 No 4 (2007): Vol. 18 No. 4, October 2007 Vol 18 No 3 (2007): Vol. 18 No. 3 July 2007 Vol 18 No 2 (2007): Vol. 18 No. 2 April 2007 Vol 18 No 1 (2007): Vol. 18 No. 1, January 2007 Vol 17 No 4 (2006): Vol. 17 No. 4, October 2006 Vol 17 No 3 (2006): Vol. 17 No. 3, July 2006 Vol 17 No 2 (2006): Vol. 17 No. 2, April 2006 Vol 17 No 1 (2006): Vol. 17 No. 1, January 2006 Vol 16 No 4 (2005): Vol. 16 No. 4, October 2005 Vol 16 No 3 (2005): Vol. 16 No. 3, July 2005 Vol 16 No 2 (2005): Vol. 16 No. 2, April 2005 Vol 16 No 1 (2005): Vol. 16 No.1, January 2005 Vol 15 No 4 (2004): Vol. 15 No. 4, October 2004 Vol 15 No 3 (2004): Vol. 15 No. 3, July 2004 Vol 15 No 2 (2004): Vol. 15 No.2, April 2004 Vol 15 No 1 (2004): Vol. 15 No.1, January 2004 Vol 14 No 4 (2003): IJP Vol. 14 No. 4, October 2003 Vol 14 No 3 (2003): Vol. 14 No.2, Juli 2003 Vol 14 No 2 (2003): Vol. 14 No.2, April 2003 Vol 14 No 1 (2003): Vol. 14 No.1, Januari 2003 Vol 13 No 4 (2002): Vol. 13 No.4, October 2002 Vol 13 No 3 (2002): Vol. 13 No.3, Juli 2002 Vol 13 No 2 (2002): Vol. 13 No.2, April 2002 Vol 13 No 1 (2002): Vol. 13 No.1, Januari 2002 Vol 12 No 4 (2001): Vol. 12 No.4, Oktober 2001 Vol 12 No 3 (2001): Vol. 12 No.3, Juli 2001 Vol 12 No 2 (2001): Vol. 12 No. 2, April 2001 Vol 12 No 1 (2001): Vol. 12 No. 1, Januari 2001 More Issue