TERNARY REACTIONS IN 197AU + 197AU COLLISIONS REVISITED

2007 ◽  
Vol 16 (02) ◽  
pp. 511-515 ◽  
Author(s):  
I. SKWIRA-CHALOT ◽  
K. SIWEK-WILCZYŃSKA ◽  
J. WILCZYŃSKI ◽  
F. AMORINI ◽  
A. ANZALONE ◽  
...  
Keyword(s):  
Binary System ◽  
Preliminary Data ◽  
Complete Data ◽  
Angular Range ◽  
Fission Reactions ◽  
Preliminary Results ◽  
Strongly Damped ◽  
Forward Hemisphere ◽  
System Mechanism

Ternary events originating from the 197 Au + 197 Au reaction at 15 MeV/nucleon, studied by using the multidetector array CHIMERA at LNS Catania, have been collected in almost complete 2π range of the forward hemisphere of CHIMERA thus extending the angular range of our previously reported preliminary data. Energy- and time calibrations for heavy fragments at large angles were supplemented with an analysis of coincidence events of binary strongly damped reactions. Contrary to the previous preliminary results, the new complete data clearly show presence of sequential fission processes in which one of Au -like nuclei undergoes fission after re-separation of the primary binary system. Mechanism of these two types of reactions observed in our data, sequential fission reactions and prompt ternary processes, are presently studied using comparisons with predictions of the stochastic BNV model of Baran, Colonna and Di Toro and the QMD model of Łukasik.

Preliminary data of hereditary constitutional studies in endemic goiter in the Mariob region

1930 ◽  
Vol 26 (3) ◽  
pp. 290-299
Author(s):  
M. P. Andreev ◽  
M. G. Ul'yanova
Keyword(s):  
Preliminary Data ◽  
Endemic Goiter ◽  
Journal Article ◽  
Medical Community ◽  
Preliminary Results ◽  
Enormous Amount ◽  
The Future

In the summer of 1928 and 1929, we had to work on an expedition to study the endemic goiter in the Mariob region. It is impossible to cover in a journal article the enormous amount of material that these expeditions brought (mainly in 1929), its processing is still ongoing and the publication of data in special works of the expedition is a matter of the future; but already at the present time it is possible to share some preliminary results that are of interest to a wide medical community.

scholarly journals The Angular Structures of Some Compact Sources

1972 ◽  
Vol 44 ◽  
pp. 214-215
Author(s):  
H. P. Palmer
Keyword(s):  
Position Angle ◽  
Complete Data ◽  
Radio Link ◽  
Complex Structures ◽  
Preliminary Results ◽  
Set Size ◽  
Full Analysis ◽  
Size Limits ◽  
Compact Sources

From 1965 to 1967 radio link interferometers were operated between Jodrell Bank and Malvern, at wavelengths of 21, 11, and 6 cm. Preliminary results were published by Adgie et al. (1965), Barber et al. (1966), Palmer et al. (1967) and Miley et al. (1967). The full analysis of these data has now been completed. Donaldson et al. (1969) report that six sources were unresolved, and they set size limits in the range 0.1 to 0.01 arc sec. Seven sources were found to contain unresolved components, and similar but less complete data were obtained on 33 other sources. Four sources (3C 119, 138, 147, and 237) were shown to have double or more complex structures. (Donaldson and Smith, 1970; Donaldson et al., 1970). The cores of 3C 274 and four other sources were shown to have elongations in the range 0.3 to 0.03 arc sec. One of these is 3C 287, and when the data on this source are combined with those of Clark et al. (1968) at 1660 MHz it appears that this source is a double of separation 0.08 arc sec in position angle 025°. This differs from the interpretation given by Clark et al. Some new data were also obtained on the well known double sources 3C 405 and 1938-15.

scholarly journals δ Sct-Type Pulsators in Eclipsing Binary Systems: the Case of RZ Cas

2002 ◽  
Vol 185 ◽  
pp. 102-103
Author(s):  
E. Rodríguez ◽  
V. Costa ◽  
M.J. López-González ◽  
J.M. García ◽  
S.L. Kim ◽  
...  
Keyword(s):  
Binary System ◽  
Binary Systems ◽  
Hot Spot ◽  
Primary Component ◽  
Roche Lobe ◽  
Light Curves ◽  
Eclipsing Binary ◽  
Preliminary Results ◽  
The Impact

AbstractRZ Cas is an Algol-type eclipsing binary system where the primary component was recently discovered as a δ Set pulsator. A three-continent multisite photometric campaign was carried out during 1999. Preliminary results are reported here indicating a semi-detached system where the secondary fills its Roche lobe. The light curves also suggest a hot spot on the surface of the primary component as a consequence of the impact of the mass stream from the secondary. The pulsational behaviour can be well described with only one frequency.

scholarly journals De-Centered Central Stars of Planetary Nebulae

2003 ◽  
Vol 209 ◽  
pp. 541-542 ◽  
Author(s):  
Aubrie McLean ◽  
Martín A. Guerrero ◽  
Robert A. Gruendl ◽  
You-Hua Chu
Keyword(s):  
Binary System ◽  
Mass Loss ◽  
Planetary Nebulae ◽  
Central Star ◽  
Large Sample ◽  
Preliminary Results ◽  
Wide Range ◽  
Central Stars

The origin of the wide range of morphologies observed in planetary nebulae (PNe) is not well established. The influence of a binary companion of the central star can naturally explain this variety of morphologies, but very few PNe have known binary central stars. The evolution of the binary system with mass loss may result in the displacement of the central star from the nebular center. The large sample of PNe observed by HST is being used to search for de-centered central stars. Preliminary results indicate that the occurrence of de-centered central stars is widespread among all morphological types of PNe.

scholarly journals ∊ Aur in eclipse: Post-AGB primary and disk-shaped secondary

2011 ◽  
Vol 7 (S283) ◽  
pp. 454-455
Author(s):  
Chinnathambi Muthumariappan ◽  
Mudumba Parthasarathy ◽  
Kanniah Jayakumar ◽  
Manickam Appakutty
Keyword(s):  
High Resolution ◽  
Binary System ◽  
Radiative Transfer ◽  
Transfer Problem ◽  
Line Profiles ◽  
Radiative Transfer Problem ◽  
Eclipsing Binary ◽  
Preliminary Results ◽  
Spectroscopic Monitoring

AbstractWe present physical and chemcal properties of the disk in the eclipsing binary system ∊ Aur by solving 2D radiative transfer problem. We also present preliminary results of our high resolution spectroscopic monitoring of K I, Na, and Hα line profiles variation during the totality phase of the recent eclipse of ∊ Aur.

scholarly journals Mini Review Immunological Consequences of Immunization With COVID-19 mRNA Vaccines: Preliminary Results

2021 ◽  
Vol 12 ◽  
Author(s):  
Andrea Lombardi ◽  
Giorgio Bozzi ◽  
Riccardo Ungaro ◽  
Simone Villa ◽  
Valeria Castelli ◽  
...  
Keyword(s):  
Preliminary Data ◽  
Vaccine Efficacy ◽  
Neutralizing Antibodies ◽  
Cellular Response ◽  
Safety And Efficacy ◽  
Specific Antibodies ◽  
Preliminary Results ◽  
Efficacy Profile

Background: BNT162b2 and mRNA-1273 are the two recently approved mRNA-based vaccines against COVID-19 which has shown excellent safety and efficacy. Preliminary data about specific and neutralizing antibodies is available covering the first 100 days after vaccination.Methods: We reviewed all the publications regarding the immunologic consequences of BNT162b2 and mRNA-1273 vaccination. A summary of specific antibodies concentration and neutralizing antibodies titers elicited by each vaccine is provided.Results: BNT162b2 and mRNA-1273 displayed a reassuring safety and efficacy profile, with the latter above 94%. They can elicit specific antibodies titers and neutralizing antibodies concentrations that are far superior from those observed among COVID-19 human convalescent serum, across a wide span of age, for at least 100 days after vaccination. Moreover, the vaccine-induced T cellular response is oriented toward a TH1 response and no evidence of vaccine-enhanced disease have been reported.Discussion: BNT162b2 and mRNA-1273 can elicit specific antibodies titers and neutralizing antibodies concentrations above those observed among COVID-19 human convalescent serum in the first 100 days after vaccination. Data about vaccine efficacy in those with previous COVID-19 or immunocompromised is still limited.

scholarly journals Mass Flow due to Heating in a Binary System: Application to U Cephei

1982 ◽  
Vol 69 ◽  
pp. 317-319
Author(s):  
Yoji Kondo ◽  
Jerry L. Modisette
Keyword(s):  
Binary System ◽  
Mass Flow ◽  
System Application ◽  
Average Rate ◽  
Close Binary System ◽  
Lower Atmosphere ◽  
Close Binary ◽  
Solar Mass ◽  
Model Calculations ◽  
Preliminary Results

AbstractWe have investigated the possibility of mass flow due to the heating of the cooler component in a close binary system. The heating may be caused by irradiation from the hotter companion or by other mechanisms such as the spacial coincidence of non-linear “g-mode” oscillations in the cooler star. The 2.4-day period binary U Cep, in which gas streaming has been observed, has been chosen for model calculations. Preliminary results show that such a heating of the lower atmosphere of the cooler star could lead to mass flow at an average rate of 10-9 to 10-7 solar mass per year without the star's necessarily filling its critical Roche surface.

Preliminary data on dinocysts of the upper toarcian – lower aalenian of Northeastern Siberia

2020 ◽  
Author(s):  
Anna A. Goryacheva ◽  
Keyword(s):  
Preliminary Data ◽  
Middle Jurassic ◽  
Preliminary Results ◽  
Unicellular Algae ◽  
Natural Exposure ◽  
Northeastern Siberia

The article presents preliminary results of palynological studies of the Lower-Middle Jurassic deposits, uncovered by the natural exposure of 7A on the Kelimyar river and represented by the Kelimyar Formation. The Toarian biostraton with Valvaeodinium aquilonium is identified in the section. As a result of studies in the Lower Aalenian samples, only rare dinocysts taxa were identified that did not allow to divide the upper part of the section on this group of unicellular algae.

Neutron dosimetry based on fission reactions: Preliminary results

1994 ◽  
Vol 45 (3) ◽  
pp. 391
Author(s):  
G. Bigazzi ◽  
J.C.Hadler Neto ◽  
P. Iunes ◽  
S. Meloni ◽  
M. Oddone
Keyword(s):  
Fission Reactions ◽  
Neutron Dosimetry ◽  
Preliminary Results

scholarly journals Preliminary data on preservation of the cultural layer of the Middle Paleolithic site of Sukhaya Mechetka (excavation 1)

2021 ◽  
pp. 25-46
Author(s):  
Alisa Larionova ◽  
Keyword(s):  
Data Analysis ◽  
Qualitative Analysis ◽  
Preliminary Data ◽  
Control Point ◽  
Middle Paleolithic ◽  
Eastern European ◽  
Cultural Layer ◽  
Paleolithic Site ◽  
Detailed Understanding ◽  
Preliminary Results

The Sukhaya Mechetka Middle Paleolithic site which was excavated over a wide area (around 650 m2) is one of few Eastern European sites where 3D fixation of every find was done. The study is focused on estimation of cultural layer preservation in the excavation 1. This yielded possibility to define zones of different production activities within homogeneous horizons. The analysis of archaeostratigraphy demonstrated homogeneity of the most parts of cultural horizon. While its thickness usually varies from 5 to 35 cm in few cases it reaches 105 cm. It is suggested that most areas with disturbed cultural horizons are associated with a shift of control point or related near the ravine zone. This article presents preliminary results, research will continue. The archaeostratigraphy analysis for excavation 2, refitting data analysis, field documentation from the personal archive of S.N. Zamyatnin, quantitative and qualitative analysis of the composition of finds within different zones of the site will allow a more detailed understanding the problem posed.

Sign in / Sign up

Export Citation Format

Share Document