34 research outputs found
Physics of Atomic Nuclei V. 67, I. 09
No full textPhysics of Atomic Nuclei -- September 2004
Volume 67, Issue 9, pp. 1611-1765
Proton–Neutron Interaction near Closed Shells
A. Covello, L. Coraggio, A. Gargano, and N. Itaco
pp. 1611-1618 Full Text: PDF (192 kB)
Relativistic Description of Exotic Nuclei and Nuclear Matter at Extreme Conditions
J. Meng, S. F. Ban, J. Li, W. H. Long, H. F. Lü, S. Q. Zhang, W. Zhang, and S.-G. Zhou
pp. 1619-1626 Full Text: PDF (910 kB)
The Neutron Drip Line in the Region of N = 20 and N = 28 Closures
S. M. Lukyanov and Yu. E. Penionzhkevich
pp. 1627-1632 Full Text: PDF (218 kB)
QRPA Coordinate Space Calculations of 2+ States in N = 20 Isotones
N. Van Giai and M. Yamagami
pp. 1633-1639 Full Text: PDF (189 kB)
Mean Field and Beyond in Nuclei Far from Stability Lines
P. F. Bortignon, F. Barranco, R. A. Broglia, G. Colò, and E. Vigezzi
pp. 1640-1644 Full Text: PDF (142 kB)
Microscopic Description of Mixed-Symmetry States in Nearly Spherical Nuclei
Ch. Stoyanov and N. Lo Iudice
pp. 1645-1649 Full Text: PDF (155 kB)
Collective Excitations and a Backbending Phenomenon in 156Dy
J. Kvasil, R. G. Nazmitdinov, and A. S. Sitdikov
pp. 1650-1655 Full Text: PDF (184 kB)
Effects of Dirac Sea on Giant Resonance States
H. Kurasawa and T. Suzuki
pp. 1656-1663 Full Text: PDF (208 kB)
Photonuclear Reactions: Modern Status of the Data
B. S. Ishkhanov and V. V. Varlamov
pp. 1664-1673 Full Text: PDF (361 kB)
Electric Dipole Transitions in Neutron-Rich Nuclei
T. Suzuki, H. Sagawa, and K. Hagino
pp. 1674-1681 Full Text: PDF (260 kB)
Low-Lying Dipole Excitations in Nuclei in the Mass Regions of the New Dynamical Symmetries
M. Scheck, P. von Brentano, C. Fransen, A. Gade, H. von Garrel, J. Jolie, U. Kneissl, C. Kohstall, A. Linnemann, N. Pietralla, H. H. Pitz, F. Stedile, S. Walter, and V. Werner
pp. 1682-1687 Full Text: PDF (266 kB)
Nuclear Physics Aspects of the Astrophysical p-Process
Zs. Fülöp, Gy. Gyürky, and E. Somorjai
pp. 1688-1695 Full Text: PDF (206 kB)
Weak Interaction Rates for Astrophysical Applications
I. N. Borzov
pp. 1696-1700 Full Text: PDF (164 kB)
Nuclear Structure with the Dinuclear Model
G. G. Adamian, N. V. Antonenko, R. V. Jolos, Yu. V. Palchikov, W. Scheid, and T. M. Shneidman
pp. 1701-1708 Full Text: PDF (222 kB)
Superdeformation as Cluster State
G. G. Adamian, N. V. Antonenko, R. V. Jolos, Yu. V. Palchikov, W. Scheid, and T. M. Shneidman
pp. 1709-1714 Full Text: PDF (159 kB)
Integral Equations in the Fock–Bargmann Space and the Generator-Coordinate Method
G. F. Filippov, Yu. A. Lashko, S. V. Korennov, and K. Kato
pp. 1715-1720 Full Text: PDF (152 kB)
Trinucleon Cluster Structure at High-Excitation Energies in A = 6 Nuclei
H. Akimune, T. Yamagata, S. Nakayama, M. Fujiwara, K. Fushimi, K. Hara, K. Y. Hara, K. Ichihara, K. Kawase, K. Matsui, K. Nakanishi, A. Shiokawa, M. Tanaka, H. Utsunomiya, and M. Yosoi
pp. 1721-1725 Full Text: PDF (228 kB)
Nontrivial Manifestation of Clustering in Fission of Heavy Nuclei at Low and Middle Excitations
Yu. V. Pyatkov, V. V. Pashkevich, W. H. Trzaska, G. G. Adamian, N. V. Antonenko, D. V. Kamanin, V. A. Maslov, V. G. Tishchenko, and A. V. Unzhakova
pp. 1726-1730 Full Text: PDF (304 kB)
Relativistic and Nonrelativistic Calculations of the Isoscalar Monopole and Dipole States
G. Colò and N. Van Giai
pp. 1731-1736 Full Text: PDF (179 kB)
Effects of Coupling between Particles and Surface Vibrations on Isoscalar Response of Nuclei
V. I. Abrosimov, O. I. Davidovskaya, A. Dellafiore, and F. Matera
pp. 1737-1741 Full Text: PDF (172 kB)
Structure of the Gamow–Teller Resonance in 58Cu Studied via the Proton- and gamma-Decay Measurements
M. Fujiwara
pp. 1742-1749 Full Text: PDF (587 kB)
The Nature of Low-Lying Kpi = 0+ Bands in Nuclei
A. Aprahamian
pp. 1750-1755 Full Text: PDF (158 kB)
Low-Lying States and Separabelized Skyrme Interactions
A. P. Severyukhin, V. V. Voronov, Ch. Stoyanov, and N. Van Giai
pp. 1756-1759 Full Text: PDF (136 kB)
Complex Shape Effects in Nuclear Rotational Spectra
N. Minkov, S. B. Drenska, P. Yotov, and W. Scheid
pp. 1760-1765 Full Text: PDF (170 kB)Archived web conten
Physics of Atomic Nuclei V. 66, I. 08
No full textPhysics of Atomic Nuclei -- August 2003
Volume 66, Issue 8, pp. 1399-1589
The ALTO Project at IPN Orsay
F. Ibrahim
pp. 1399-1406 Full Text: PDF (587 kB)
Physics with Fission Fragments: Project DRIBs-2
Yu. E. Penionzhkevich
pp. 1407-1412 Full Text: PDF (235 kB)
Isotopic Production Cross Sections of Residues in Reactions Induced by Relativistic Heavy Ions with Protons and Deuterons
E. Casarejos, P. Armbruster, L. Audouin, J. Benlliure, M. Bernas, A. Boudard, R. Legrain, S. Leray, B. Mustapha, S. Czajkowski, T. Enqvist, B. Fernandez, J. Pereira, M. Pravikoff, F. Rejmund, K.-H. Schmidt, C. Stephan, J. Taieb, L. Tassan-Got, C. Villagrasa, C. Volant, and W. Wlazlo
pp. 1413-1420 Full Text: PDF (405 kB)
Decay of Neutron-Rich Ga Isotopes near N=50 at PARRNe
O. Perru, F. Ibrahim, O. Bajeat, C. Bourgeois, F. Clapier, E. Cottereau, C. Donzaud, M. Ducourtieux, S. Galès, D. Guillemaud-Mueller, C. Lau, H. Lefort, F. Le Blanc, A. C. Mueller, J. Obert, N. Pauwels, J. C. Potier, F. Pougheon, J. Proust, B. Roussière, J. Sauvage, O. Sorlin, and D. Verney
pp. 1421-1427 Full Text: PDF (429 kB)
A Study of gammaDecays and Octupole Bands in 21Ne and 21Na
S. Thummerer, W. von Oertzen, Tz. Kokalova, H. G. Bohlen, B. Gebauer, A. Tumino, T. N. Massey, G. de Angelis, M. Axiotis, A. Gadea, Th. Kröll, N. Marginean, D. R. Napoli, M. De Poli, C. Ur, D. Bazzacco, S. M. Lenzi, C. Rossi Alvarez, S. Lunardi, R. Menegazzo, P. G. Bizzeti, and A. M. Bizzeti-Sona
pp. 1428-1433 Full Text: PDF (167 kB)
Separable Skyrme Interactions and Quasiparticle RPA
A. P. Severyukhin, V. V. Voronov, Ch. Stoyanov, and Nguyen Van Giai
pp. 1434-1438 Full Text: PDF (138 kB)
Clustering in the Region of Nuclear Surface
V. G. Kartavenko, K. A. Gridnev, J. Maruhn, and W. Greiner
pp. 1439-1444 Full Text: PDF (169 kB)
Study of Giant Pairing Vibrations with Neutron-Rich Nuclei
L. Fortunato
pp. 1445-1449 Full Text: PDF (171 kB)
New Experimental Results on Emission and Reaction Barriers
N. Rowley
pp. 1450-1453 Full Text: PDF (138 kB)
Dynamics of Superheavy System in 86Kr+208Pb Reaction
V. A. Rubchenya, A. A. Alexandrov, S. V. Khlebnikov, V. G. Lyapin, V. A. Maslov, Yu. E. Penionzhkevich, G. Prete, Yu. V. Pyatkov, Yu. G. Sobolev, G. P. Tiourin, W. H. Trzaska, D. N. Vakhtin, and J. Äystö
pp. 1454-1459 Full Text: PDF (258 kB)
Isospin Effects in Nuclear Fragmentation
V. Baran, M. Colonna, M. Di Toro, V. Greco, M. Zielinska-Pfabe, and H. H. Wolter
pp. 1460-1470 Full Text: PDF (206 kB)
Determination of the Freeze-Out Temperature by the Isospin Thermometer
P. Napolitani, K.-H. Schmidt, P. Armbruster, A. S. Botvina, M. V. Ricciardi, L. Tassan-Got, F. Rejmund, and T. Enqvist
pp. 1471-1477 Full Text: PDF (353 kB)
Nuclear Rainbow in Scattering and Reactions and Nucleus–Nucleus Interaction at Small Distances
A. A. Ogloblin, S. A. Goncharov, Yu. A. Glukhov, A. S. Dem'yanova, M. V. Rozhkov, V. P. Rudakov, and W. H. Trzaska
pp. 1478-1488 Full Text: PDF (306 kB)
Rainbow, Airy Structure, and Molecular Structure in the 16O+16O System
S. Ohkubo
pp. 1489-1493 Full Text: PDF (160 kB)
Structure of Neutron-rich Be and C Isotopes
H. G. Bohlen, W. von Oertzen, R. Kalpakchieva, B. Gebauer, S. M. Grimes, A. Lenz, T. N. Massey, M. Milin, Ch. Schulz, Tz. Kokalova, S. Torilov, and S. Thummerer
pp. 1494-1500 Full Text: PDF (253 kB)
Structure Studies of Exotic Nuclei Using (p,p') Reactions
V. Lapoux, N. Alamanos, and E. Khan
pp. 1501-1507 Full Text: PDF (238 kB)
Structure of 10C and 11C from Elastic and Inelastic Scattering on a Proton Target
C. Jouanne, N. Alamanos, F. Auger, A. Drouart, A. Gillibert, V. Lapoux, G. Lobo, L. Nalpas, E. C. Pollacco, J. L. Sida, Y. Blumenfeld, E. Khan, T. Suomijarvi, T. Zerguerras, A. Lagoyannis, A. Pakou, P. Roussel-Chomaz, H. Savajols, and A. Musumarra
pp. 1508-1514 Full Text: PDF (325 kB)
Proton Halos in Exotic Light Nuclei
Z. Ren, X. Z. Cai, H. Y. Zhang, and W. Q. Shen
pp. 1515-1518 Full Text: PDF (110 kB)
Two-Proton Radioactivity Search
I. G. Mukha
pp. 1519-1522 Full Text: PDF (131 kB)
The Present and Planned Recoil Mass Spectrometers at Nuclear Science Centre, New Delhi
S. Nath, A. Jhingan, T. Varughese, J. J. Das, P. Sugathan, N. Madhavan, R. Kumar, R. P. Singh, S. Muralithar, R. K. Bhowmik, and A. K. Sinha
pp. 1523-1527 Full Text: PDF (176 kB)
The Characteristics of the Halo Neutron Preemission in the Fusion of 11Li with Light Targets
M. Petrascu
pp. 1528-1535 Full Text: PDF (167 kB)
New Neutron Magic Number N=16 for Neutron-Rich Nuclei
Z. Dlouhý et al. (for GANIL-Orsay-Dubna-Rez-Bucharest Collaboration)
pp. 1536-1543 Full Text: PDF (186 kB)
Resonance States of Hydrogen Nuclei 4H and 5H Obtained in Transfer Reactions with Exotic Beams
G. M. Ter-Akopian, D. D. Bogdanov[dagger], A. S. Fomichev, M. S. Golovkov, Yu. Ts. Oganessian, A. M. Rodin, S. I. Sidorchuk, R. S. Slepnev, S. V. Stepantsov, R. Wolski, V. A. Gorshkov, M. L. Chelnokov, A. A. Korsheninnikov, E. Yu. Nikolski, I. Tanihata, F. Hanappe, T. Materna, L. Stuttge, and A. H. Ninane
pp. 1544-1551 Full Text: PDF (216 kB)
Collective Excitations of the Element Z=120
S. Misicu, T. Bürvenich, T. Cornelius, and W. Greiner
pp. 1552-1556 Full Text: PDF (133 kB)
Binding Energies of Even–Even Superheavy Nuclei
Z. Ren
pp. 1557-1560 Full Text: PDF (103 kB)
Manifestation of Shell Effects in Quasifission Reactions
E. A. Cherepanov and V. V. Volkov
pp. 1561-1568 Full Text: PDF (666 kB)
On Search and Identification of Relatively Short-Lived Superheavy Nuclei (Z=>110) by Fossil Track Studies of Meteoritic and Lunar Olivine Crystals
V. P. Perelygin[dagger], Yu. V. Bondar, R. Brandt, W. Ensinger, R. L. Fleischer, L. I. Kravets, M. Rebetez, R. Spohr, P. Vater, and S. G. Stetsenko
pp. 1569-1573 Full Text: PDF (123 kB)
Nuclear Mean Field from Chirally Symmetric Effective Theory
A. Staszczak
pp. 1574-1577 Full Text: PDF (120 kB)
Application of the Program LISE to Fusion–Evaporation
O. B. Tarasov and D. Bazin
pp. 1578-1581 Full Text: PDF (213 kB)
New Mechanism for the Production of Extremely Fast Light Particles in Heavy-Ion Collisions in the Fermi Energy Domain
A. S. Denikin and V. I. Zagrebaev
pp. 1582-1585 Full Text: PDF (136 kB)
Multidimensional Langevin Approach to Description of Near-Barrier Heavy-Ion Fusion and Deep-Inelastic Collisions
M. A. Naumenko, A. S. Denikin, and V. I. Zagrebaev
pp. 1586-1589 Full Text: PDF (219 kB)Archived web conten
Industrial dominance: the theory and the methods of diagnosis
No full textThe results of industrial dominance’ theoretic research and the methods of diagnosis are presented. According to the authors, the impact of industrial dominance lies in the sphere of decreasing the firm’s access to agglomeration effects. The basic conditions which are needed for the emergence of industrial dominance are presented. The author presents the way to diagnose existence of industrial dominance along with the method of measuring the influence of industrial dominance within a particular industry. The results presented by the authors will help to form effective economic policy for industries where industrial dominance is presented
Experimental study of cluster effects in binary and ternary decays of low excited actinides
Get PDFThesis (PhD)--Stellenbosch University, 2018.ENGLISH ABSTRACT : The experimental study of rare decay modes of ternary fission performed
by the FOBOS group at the Joint Institute for Nuclear Research (JINR)
in Dubna, Russia, revealed a new ternary decay mode of low excited
heavy nuclei. This new ternary decay mode is referred to as Collinear
Cluster Tri-partition (CCT). The distinct features of the CCT include the
centre of mass of one of the decay fragments and the centre of mass of
the two other decay fragments moving in opposite directions relative to
each other. Another experimental signature for identifying the CCT is
that one of the three decay fragments have a magic nucleon number
configuration.
The first experimental observation of the CCT was revealed in a study
of spontaneous decay of 252Cf performed using a so-called modified FOBOS spectrometer facility installed at the JINR. This phenomenon
was observed using the missing-mass method, where two fragments
were detected, the third one being missing. The missing mass was
accounted for by the difference in the masses of the detected fragments
and the mass of the initial nucleus. The CCT manifested itself through
a bump in the mass-mass distribution of fission fragments from the
decay of 252Cf. Further confirmation of the CCT using the same missingmass method was obtained from the reaction 235%(nth,") where an
experiment was performed using a spectrometer referred to as miniFOBOS. This experiment made use of a neutron beam delivered by the
IBR-2 Reactor from the Frank Laboratory of Neutron Physics at the
JINR. In both experiments the CCT was revealed as a bump in the massmass distribution which was linked to the magic nickel cluster. The
bump was referred to as the Ni-bump.
It quickly became clear from the early experiments that a direct
detection of all the decay products of the CCT will be a more convincing
experimental approach. In an effort to detect all decay products, a new double arm time-of-flight (TOF) spectrometer, based on a mosaic
detection system, aimed at detecting all the CCT products was designed
and is presented in this work. This spectrometer is referred to as
COMETA (Correlation Mosaic Energy – Time Array). The COMETA
spectrometer registers the energy and time signals of heavy ions using
mosaics of PIN diode detectors in each arm.
This new spectrometer required a new parametrization procedure to
calculate the masses of the registered fragments of the CCT. The
parametrization procedure also forms part of this work. This procedure
takes into consideration the well-known experimental challenges when
registering heavy ions using semiconductor-based detectors such as PIN
diodes. The first challenge is the so-called pulse-height defect, which is
manifested when registering the energy of heavy ions. The other
challenge is the so-called plasma delay, which occurs when registering
the time signal for the heavy ions.
To test this procedure a special experimental setup called Light Ion
Spectrometer for South Africa (LIS-SA) was put together. In this work,
an experiment performed with the LIS-SA setup, that tested this
procedure in the mass reconstruction of the fission fragments of the
CCT, is also presented.
The results from the COMETA spectrometer that confirmed the
existence of the CCT are also presented. In the mass-mass distribution
of fission fragments from the COMETA, the CCT reveals itself as
rectangular structures bounded by known deformed magic clusters such
as 123Mo, 63Sr and also magic clusters such as 128Sn. These structures
appeared in the same vicinity where the Ni-bump was observed earlier.
Further analysis of these structures revealed that they are linked to the
Ni-bump.
This work did not only provide a more convincing approach in the study
of multi-body decay of low excited nuclei (the CCT), the existence of the
CCT phenomenon was successfully confirmed through the direct detection of all the decay products of the CCT. The CCT has been
confirmed as a decay process that takes place as a two-stage break-up of
the initial three body chain-like nuclear configuration with an elongated
central cluster.AFRIKAANSE OPSOMMING : Die eksperimentele studie van rare verval modus van drieledige splyting
wat uitgevoer is deur die FOBOS groep by die Joint Institute for Nuclear
Research (JINR) in Dubna, Rusland, wys ʼn nuwe drieledige verval mode
uit vir lae opgewekte swaar kerne. Hierdie nuwe drieledige verval mode
word verwys na as ʼn ko-liniêere bondel Tri-partisie (CCT). Die
onderskeie kenmerke van die CCT sluit in die massa middelpunte van
een van die verval fragmente wat in ʼn teenoorgestelde rigting beweeg,
relatief tot die massa middelpunt van die twee ander verval fragmente.
ʼn Ander eksperimentele kenmerk wat die CCT uitwys is dat een van die
verval fragmente ‘n voorkeurgetal (Magic number) konfigurasie het.
Die eerste eksperimentele waarneming van die CCT het te voorskyn
gekom in ʼn studie van spontane verval van 252Cf en is uitgevoer deur
gebruik te maak van die sogenaamde gemodifiseerde-FOBOS
spektrometer wat installeer is by die JINR. Hierdie verskynsel was
waargeneem onder die verlore massa metode, waar twee fragmente
waargeneem was, en die derde deeltjie die verlore deeltjie is. Hierdie
verlore massa was bepaal deur die verskil tussen die massas van die
waargenome fragmente en massa van die oorspronklike kern te bereken.
Die CCT word deur ʼn piek in die massa-massa distribusie van die
splytings fragmente van die verval van 252Cf gemanifesteer. Verdere
bevestiging van die CCT onder dieselfde verlore massa metode was
verkry vanaf die reaksie 235%(nth,") waar ʼn eksperiment gedoen is met ʼn
spektrometer wat verwys word na as mini-FOBOS. Hierdie eksperiment
maak gebruik van ʼn neutronbundel wat verskaf word deur die IBR-2
Reaktor by die Frank Laboratorium vir Neutron Fisika by die JINR. In
beide eksperimente was die CCT uitgelig as ʼn piek in die massa-massa
distribusie wat gekoppel is aan die voorkeur (“magic”) nikkel bondel. Die
piek word na verwys as die Ni-piek. Dit het vinnig duidelik geword vanaf vroeër eksperimente dat ʼn direkte
waarneming van al die vervalprodukte van die CCT, ʼn meer
geloofwaardige eksperimentele benadering sal wees. In ʼn poging om al
die verval produkte waar te neem, was ʼn dubbele arm vlugtyd (TOF)
spektrometer, gebaseer op ʼn mosaïek detektor sisteem, wat gefokus is
op die waarneming van al die CCT produkte, ontwerp en word dit in
hierdie werk voorgelê. Hierdie spektrometer word verwys na as die
COMETA (Correlation Mosaic Energy – Time Array). Die COMETA
registreer die energie en tydseine van swaar ione deur gebruik te maak
van ʼn mosaïek PIN diode detektore in elke arm.
Hierdie nuwe spektrometer benodig ʼn nuwe parameteriserings
prosedure om die massa van die geregistreerde fragmente van die CCT
te bereken. Die parameteriserings prosedure vorm ook deel van hierdie
tesis. Hierdie prosedure neem in ag die welbekende eksperimentele
uitdagings wanneer die swaar ione geregistreer word deur gebruik te
maak van semigeleier-gebaseerde detektore soos die PIN diodes. Hierdie
uitdagings is die sogenaamde pulshoogte afwyking wat ʼn negatiewe
effekt het wanneer die energie van die swaar ione geregistreer word en
ook die plasmavertraging wanneer die tydsein vir swaar ione
geregistreer word.
Om hierdie prosedure te toets is ʼn spesiale eksperimentele opstelling
genoem die Ligte Ion Spektrometer vir Suid Afrika (LIS-SA) aanmekaar
gesit. In hierdie werk is ʼn eksperiment uitgevoer met die LIS-SA
opstelling, wat die prosedure toets vir die massa her-konstruksie van die
splytsingsfragmente van die CCT.
Die resultate van die COMETA spektrometer wat bevestig dat die CCT
teenwoordig is word ook voorgelê. In die massa-massa distribusie van
die splytings fragmente vanaf die COMETA eksperiment, word die CCT
geopenbaar as ʼn reghoekige struktuur wat begrens word deur die
bekende vervormde voorkeurbondel kerne soos 123Mo, 63Sr asook
voorkeurbondel kerne soos 128Sn. Hierdie strukture kom te voorskyn in dieselfde gebied waar die Ni-piek waargeneem was. Verdere analiese
van hierdie strukture wys uit dat hulle gekoppel is aan die Ni-piek.
Nie net gee hierdie werk ʼn meer gerieflike benadering tot die studie van
veeldeeltjie verval van lae opgewekte kerne (die CCT) nie, maar die
bestaan van die CCT verskynsel was suksesvol bevestig deur die direkte
waarneming van al die verval produkte van die CCT. Die CCT was ook
hier bevestig as ʼn verval proses wat plaasvind in ʼn tweestap opbreek
van die oorspronklike drie deeltjie ketting kern konfigurasie met ʼn
verlengde sentrale bondel.Doctora
Multi-detector registration system for the study of multi-body decay of heavy body nuclei
Get PDFThesis (MMil)--Stellenbosch University, 2012.Includes bibliographyNuclear ssion is commonly known as a process where a heavy nucleus such as Uranium
or Thorium decays into two fragments of roughly equal mass. On occasion however, instead
of decay into two parts a process known as binary ssion, the nucleus can decay
into three fragments. In this decay channel known as ternary ssion, the nucleus splits
into three fragments with the third particle being too light compared to the main ssion
fragments. There are also instances where heavy nuclei split into three fragments of comparable
masses, the so called \true ternary ssion" as was predicted by the theoretical
calculations of Strutinsky [Str63]. While theoretical predictions hold promises for this decay
mode, experimental attempts had little success in proving the existence of true ternary
ssion in low energy ssion. The challenges and di culties faced by experimentalist in
con rming the existence of true ternary ssion also proved that this ssion mode is a very
rare phenomenon.
This thesis is devoted to the investigation of ternary ssion know as collinear cluster tripartition
(CCT) in spontaneous ssion of 252Cf, and the design and development of two
time-of-
ight spectrometers aimed at identifying all collinear multi-body decay partners
directly. Prior to this study the only technique that was used at identifying decay partners
in CCT was the \missing mass" approach. In this approach only two partners are identi ed
directly with the third partner being identi ed by subtracting the two observed partners
from the initial mass of the nucleus.
The experimental results from the two spectrometer setups showed that it was possible
to identify all three partners of the CCT channel. The results also con rmed the existence
of the so called \Sn lost" CCT mode which was already observed in earlier experiments.National Research Foundation (NRF)Joint Institute of Nuclear Science (JINR)Financial support from Dr D V KamanimDept of Science and Technology (DST
Numerical research of two-phase flow in fractured-porous media based on discrete fracture fetwork model
No full textDeveloping new experimental techniques to investigate the co-linear cluster tri-partitioning
Get PDFThesis (MSc)--Stellenbosch University, 2022.ENGLISH ABSTRACT: Computational simulations were developed to calculate data collection efficiency, as well as data
accuracy for existing experimental setups used in the study of the exotic ternary decay of low
excited heavy nuclei known as Co-linear Cluster Tri- partitioning (CCT) [1]. The most populated
CCT mode containing the so called “Ni-bump”. This bump is centered at the masses associated with
the magic isotopes of Ni (which include ⁶⁸Ni and ⁷²Ni). The results from these simulations give new
insight into the identification capability of heavy ions using current experimental equipment and
hint at some possible solutions to increase data collection efficiency and data accuracy.
As a charged particle interacts with the material of a semiconductor detector and deposits energy
into it, it creates high conductivity plasma along the trajectory of the particle. This disrupts
the internal electric field of the detector for some time which retards data collection. This
effect is known as Plasma Delay (PD). Development of a new algorithm and subsequent computational
implementation of this algorithm -Paraspline algorithm-, with the goal of more accurate
time-of-flight (TOF) calculations, by correcting for the PD effect in semiconductor detectors.
Testing of this algorithm show promising results, potentially improving the reliability
of future experimental results.AFRIKAANSE OPSOMMING: Geen opsomming beskikbaar.Master
Comparative energy content of steel during modernization of OAO Northern Pipe Plant steel smelting production
No full textPotential risks of atracting direct foreign investments to the formation of regional clusters
No full textThis paper discussesthe role ofdirectforeign investmentsin the processes of regionalclusters’ creation. The new type of clusters
was identified - clusters that are created bytransnational corporations (TNCs)invitedinto the territory.The authors analyzedthe
globalexperience of creatingclusters byforeign direct investmentof transnational corporations and found out thatthere is much
evidence thatindicatesa weakeconomic potentialof such projects.A statisticalanalysis of economic indicators of several foreign regional
clusters (of this type) showed that clustersof this typeare developedmainly due tomarket conditionsrather thanfrom its own resources.
Correlationandregression analysisconfirmed the hypothesisofweak influence ofdirectforeign investment on economicpotentialof
clustersin the early stagesof its development. The authors offer a set ofindicators to assessthe effectiveness ofclusters’ performancein case
of a highdependency on a foreigninvestmen
