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 5 Documents
 1 
Search results for , issue "Vol 20 No 3 (2009): Vol. 20 No. 3, July 2009" : 5 Documents clear
Effect of Alkali Compound on Morphology and Luminescence Intensity of Europium-doped Yttria Astuti Astuti; Mikrajuddin Abdullah; Khairurrijal Khairurrijal
Indonesian Journal of Physics Vol 20 No 3 (2009): Vol. 20 No. 3, July 2009
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (618.269 KB) | DOI: 10.5614/itb.ijp.2009.20.3.1

Abstract

Luminescent particles of europium-doped yttria (Y2O3:Eu) have been synthesized by heating nitrous precursors in a solution of polyethylene glycol (PEG) matrix containing alkali compound (LiOH, NaCl, KCl, and CaCl2). High luminescence intensity at around 612 nm contributed by electron transitions in Eu3+(5D0 → 7F0, 5D0 → 7F1,5D0 → 7F2, and 5D0 → 7F3) were observed. The highest intensity was observed in samples prepared using Li compound, but he smallest particle size was observed in samples prepared using Ca compound. This approach is promising for production of submicrometer down to nanometer-sized Y2O3:Eu particles that have both small in particle sizes and high luminescence intensity which is potential for use in development of luminescence ink that can be adapted to the current ink jet printing technology.
Application of TALYS code for Calculation of Fission Cross Section and Fission Yield of Several Heavy Nuclides Yuda S. Perkasa; Rizal Kurniadi; Abdul Waris
Indonesian Journal of Physics Vol 20 No 3 (2009): Vol. 20 No. 3, July 2009
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (91.739 KB) | DOI: 10.5614/itb.ijp.2009.20.3.2

Abstract

Nuclear data evaluation for fission cross section and fission yield had been performed by many investigators using different models of approximation theoretically. These models are encapsulated and implemented into computer codes to perform more robust nuclear reaction data calculations. TALYS is one of most successful nuclear reaction codes that used to determine fission cross section and fission yield. In this paper, TALYS code was used to calculate some fission reaction including Am-241 (n,f), Th-232 (n,f), and U-235 (n,f). These calculations are performed using different set of reaction mechanism and optical model parameter adjustment, such as fission barrier parameter, level density parameter, transmission mechanism, and so on. Reaction mechanism and parameter adjustment are selected based on reaction characteristics to obtain more accurate and reasonable result. The accuracy of calculation result are heavily depend on the reaction mechanism selection and parameter adjustment. All obtained results have been compared with ENDF nuclear data library.
Calculation of Level Density Parameter of Nuclear Reaction Using Neural Network Rizal Kurniadi; Yuda Satya Perkasa; Abdul Waris; Suwoto Suwoto
Indonesian Journal of Physics Vol 20 No 3 (2009): Vol. 20 No. 3, July 2009
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.151 KB) | DOI: 10.5614/itb.ijp.2009.20.3.3

Abstract

Level density parameter (LDP) calculation is dependent upon shell correction value, which usually is obtained by using Strutinsky method. The Strutinsky method is method that uses energy levels from certain potential as main input. Therefore for each mass number it strongly needs the energy levels calculation. The energy levels computation is time-consuming process; hence, the new application of computation technique is needed to reduce computation time. This paper explains the application of neural network in LDP calculation. Based on knowledge from box type and harmonic potentials, LDP is predicted by using arbitrary potential
Magnetic Anisotropy and the Paleosecular Variation Record in Stalagmites from Njirak Cave, East Java: The Effect of Detrital Magnetite Emplaced in Small Cavities by Flooding Events Satria Bijaksana; Siti Zulaikah; Joseph Paul Hodych
Indonesian Journal of Physics Vol 20 No 3 (2009): Vol. 20 No. 3, July 2009
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (656.942 KB) | DOI: 10.5614/itb.ijp.2009.20.3.4

Abstract

Magnetic anisotropy and remanence were measured for 33 samples from the axis of two stalagmites from Njirak Cave in East Java. All 33 samples were stepwise demagnetized with alternating fields, but only 16 were stable enough to yield reliable characteristic remanence directions. These directions differ, especially in declination, from the present Earth’s field direction and agree for samples of about the same age from both stalagmites, suggesting that the Earth’s field at Njirak Cave maintained a declination averaging 23° and an inclination averaging −23° for most of the past 2,500 years. Anisotropy of magnetic susceptibility is high, averaging 5.8%. The minimum susceptibility axes are nearly horizontal with scattered declinations; whereas the maximum susceptibility axes tend to be steeply inclined (average inclination is 51°). This implies that the long axes of the mainly multi-domain magnetite grains tend to be steeply inclined (rather than horizontal, as expected if the magnetite were in horizontal detrital layers). We suggest that this is due to the magnetite being in flood-emplaced detritus adhering to the steeply-inclined sides of small (2 to 5 mm) cavities that cut across and are sealed off by the stalagmites’ horizontal calcite growth layers. Steeply inclined maximum susceptibility axes should help detect such stalagmites, whose quality of paleosecular variation record may be lowered by magnetite-bearing cavities.
Imaging Subsurface Fracture and Void using Wide-Band Inversion of Fresnel Interpolated Wavepath Seismic Tomography Bagus E. B. Nurhandoko
Indonesian Journal of Physics Vol 20 No 3 (2009): Vol. 20 No. 3, July 2009
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (316.009 KB) | DOI: 10.5614/itb.ijp.2009.20.3.5

Abstract

Studying existence of fracture, void as well as fault in subsurface are important and it has wide applications. In addition, fracture and void play important role in reservoir productivity as well as in geotechnical application. The problem in imaging fracture and void in subsurface, however, is resolution. It needs high-resolution imaging method laterally as well as vertically. The seismic velocity imaging, however, usually has poor lateral resolution. Seismic tomography provides better resolution than conventional velocity analysis methods. Conventional raypath seismic tomography, however, needs dense as well as high angle and wide measurement configuration that is high cost in field data acquisition. I propose to use Fresnel interpolated wavepath (FIW) wide-band inversion. FIW is an interpolation between imaginary part of Rhytov scattering wavepath and raypath. Then, FIW is combined with wide band inversion procedure to handle sparseness configuration of measurement. By this method, smooth constraint is implemented more naturally by based on wave's spectrum. Furthermore, it can produce more stable inversion procedure. In this paper, Wide-band inversion of FIW tomography is tested into various seismic field data in order to image void, fault and fracture. The results showed that tomography based on FIW could handle the limitation of configuration angle, sparseness configuration and resulting good image. We use many difficult cases of field data such as: subsurface tunnel imaging and also void-fracture imaging in volcanic rock

Page 1 of 1 | Total Record : 5

 1 

Filter by Year

2009 2009


Reset
Filter By Issues
All Issue 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