Analysis of mass-separated evaporation residues formed in S32+Zn70,68 fusion reactions: The special case of Ru97,95

2021 ◽  
Vol 104 (1) ◽  
Author(s):  
Deepak Kumar ◽  
Moumita Maiti ◽  
Rinku Prajapat ◽  
Amit Chauhan ◽  
Rohan Biswas ◽  
...  
Keyword(s):  
Fusion Reactions ◽  
Evaporation Residues ◽  
Special Case

COLD FUSION REACTIONS USING NEUTRON-RICH PROJECTILES

2013 ◽  
Vol 22 (08) ◽  
pp. 1350061 ◽  
Author(s):  
A. SULAKSONO
Keyword(s):  
Cross Section ◽  
Compound Nucleus ◽  
Cross Sections ◽  
Estimation Method ◽  
Cold Fusion ◽  
Evaporation Residue ◽  
Fusion Reactions ◽  
Fusion Barrier ◽  
The Cross ◽  
Evaporation Residues

This paper studies the formation cross-sections of super heavy (SH) nuclei in some cold fusion reactions of radioactive neutron-rich projectiles with double-magic 208 Pb target. In this study, the cross-sections of capture, fusion and evaporation residues in one- and two-neutron (1n and 2n) channels are calculated by using neutron-rich Fe , Ni and Zn projectiles are compared to the cross-sections calculated using stable Fe , Ni and Zn projectiles. The heights of fusion barrier and their positions in all reactions considered in this study are also compared to the heights and positions calculated using the estimation method proposed by Dutt and Puri. For cold fusion reactions with stable Fe , Ni and Zn projectiles, the heights of fusion barrier and the cross-sections of evaporation residues in 1n and 2n channels are compared to their corresponding experimental data. In general, for reactions using projectiles with the same proton number, the neutron-rich projectile is found to yield relatively-heavier mass of SH nucleus and larger evaporation residue cross-section, compared to those of the corresponding stable projectiles. However, in certain reactions, the cross-sections of neutron-rich projectile can be slightly larger or slightly smaller than that of the corresponding stable projectile. This behavior is highly affected by the charge of projectile and the fission barrier of the formed compound nucleus (CN). In addition, the 292114 is found to be the heaviest compound nucleus formed in cold fusion reaction by using neutron-rich nuclei as the projectile, but the cross-section of evaporation residue in one-neutron channel is still around few pico barns (pb).

THE MEASUREMENT OF THE EVAPORATION RESIDUES EXCITATION FUNCTIONS IN THE FUSION REACTIONS 144Sm (40Ar,xn) AND 166Er(40Ar,xn)

Exotic Nuclei ◽  
2015 ◽  
Author(s):  
E. V. Chernysheva ◽  
A. M. Rodin ◽  
A. V. Belozerov ◽  
S. N. Dmitriev ◽  
A. V. Gulyaev ◽  
...  
Keyword(s):  
Fusion Reactions ◽  
Excitation Functions ◽  
Evaporation Residues

Yields of evaporation residues and average angular momentum in heavy ion induced fusion reactions leading to compound nucleus96Ru

Pramana ◽  
1992 ◽  
Vol 38 (3) ◽  
pp. 291-312 ◽  
Author(s):  
M Dasgupta ◽  
A Navin ◽  
Y K Agarwal ◽  
C V K Baba ◽  
H C Jain ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Heavy Ion ◽  
Fusion Reactions ◽  
Average Angular Momentum ◽  
Evaporation Residues

SUPERHEAVY RESEARCH AT RIKEN

2009 ◽  
Vol 18 (10) ◽  
pp. 2175-2178 ◽  
Author(s):  
KOSUKE MORITA
Keyword(s):  
High Intensity ◽  
Neutron Emission ◽  
Alpha Decay ◽  
Heavy Ion ◽  
Fusion Reactions ◽  
Chemical Research ◽  
Decay Properties ◽  
Evaporation Residues ◽  
Heaviest Elements ◽  
Physical And Chemical

At RIKEN (The Institute of Physical and Chemical Research) in Japan, we have performed experiments to study the productions and decays of the heaviest elements produced by one neutron emission channels of 208 Pb and 209 Bi based heavy-ion induced fusion reactions. A gas-filled type recoil separator has been used for collecting evaporation residues of the reactions separating them from high intensity beam particles. The reactions studied were 208 Pb (58 Fe , n )265 Hs , 208 Pb (64 Ni , n ) 271 Ds , 209 Bi (64 Ni , n ) 272 Rg , 208 Pb (70 Zn , n ) 277112, and 209 Bi (70 Zn , n ) 278113. In studies of the first four reactions we have provided the independent confirmations of the productions and their decays of the isotopes, 265 Hs , 271 Ds , 272 Rg , and 277112, as well as the decay properties of their decay daughters, previously studied by Hofmann et al., a group of Gesellschaft für Schwerionenforschung (GSI), Germany. In the last reaction, we observed two decay chains originated from the isotope 278113, assigned firstly by generic correlation of the alpha decay chains connected into the previously known decay of 266 Bh and 262 Db via previously unknown alpha decays of 278113, 274 Rg and 270 Mt .

Measurements of evaporation residues to investigate lower limiting angular momenta in fusion reactions

1986 ◽  
Vol 456 (2) ◽  
pp. 298-316 ◽  
Author(s):  
H. Ikezoe ◽  
N. Shikazono ◽  
Y. Tomita ◽  
K. Ideno ◽  
Y. Sugiyama ◽  
...  
Keyword(s):  
Fusion Reactions ◽  
Angular Momenta ◽  
Evaporation Residues

scholarly journals Integral system for detecting evaporation residues in fusion reactions

2005 ◽  
Vol 35 (3b) ◽  
Author(s):  
O.A. Capurro ◽  
J.E. Testoni ◽  
G.V. Martí ◽  
A. Arazi ◽  
J.O. Fernández Niello ◽  
...  
Keyword(s):  
Fusion Reactions ◽  
Integral System ◽  
Evaporation Residues

Extreme self-sacrifice beyond fusion: Moral expansiveness and the special case of allyship

2018 ◽  
Vol 41 ◽  
Author(s):  
Daniel Crimston ◽  
Matthew J. Hornsey
Keyword(s):  
General Theory ◽  
Biological Markers ◽  
Natural Environment ◽  
Relevant Dimension ◽  
Special Case

AbstractAs a general theory of extreme self-sacrifice, Whitehouse's article misses one relevant dimension: people's willingness to fight and die in support of entities not bound by biological markers or ancestral kinship (allyship). We discuss research on moral expansiveness, which highlights individuals’ capacity to self-sacrifice for targets that lie outside traditional in-group markers, including racial out-groups, animals, and the natural environment.

Determination of the phase structure of polymerblends by electron microscopy

1978 ◽  
Vol 36 (1) ◽  
pp. 492-493
Author(s):  
Dr. G. Kaemof
Keyword(s):  
Screw Extruder ◽  
Electron Microscopic ◽  
Thin Sections ◽  
Single Screw Extruder ◽  
Transmission Electron ◽  
The Matrix ◽  
Twin Screw ◽  
Special Case ◽  
Microscopic Investigations

A mixture of polycarbonate (PC) and styrene-acrylonitrile-copolymer (SAN) represents a very good example for the efficiency of electron microscopic investigations concerning the determination of optimum production procedures for high grade product properties.The following parameters have been varied:components of charge (PC : SAN 50 : 50, 60 : 40, 70 : 30), kind of compounding machine (single screw extruder, twin screw extruder, discontinuous kneader), mass-temperature (lowest and highest possible temperature).The transmission electron microscopic investigations (TEM) were carried out on ultra thin sections, the PC-phase of which was selectively etched by triethylamine.The phase transition (matrix to disperse phase) does not occur - as might be expected - at a PC to SAN ratio of 50 : 50, but at a ratio of 65 : 35. Our results show that the matrix is preferably formed by the components with the lower melting viscosity (in this special case SAN), even at concentrations of less than 50 %.

Test Validation Without Measurement

2016 ◽  
Vol 32 (3) ◽  
pp. 204-214 ◽  
Author(s):  
Emilie Lacot ◽  
Mohammad H. Afzali ◽  
Stéphane Vautier
Keyword(s):  
Test Data ◽  
Test Scores ◽  
Scientific Explanation ◽  
Test Validation ◽  
Clinical Tests ◽  
Ethical Perspective ◽  
Power Of Test ◽  
Memory Accuracy ◽  
Social Uses ◽  
Special Case

Abstract. Test validation based on usual statistical analyses is paradoxical, as, from a falsificationist perspective, they do not test that test data are ordinal measurements, and, from the ethical perspective, they do not justify the use of test scores. This paper (i) proposes some basic definitions, where measurement is a special case of scientific explanation; starting from the examples of memory accuracy and suicidality as scored by two widely used clinical tests/questionnaires. Moreover, it shows (ii) how to elicit the logic of the observable test events underlying the test scores, and (iii) how the measurability of the target theoretical quantities – memory accuracy and suicidality – can and should be tested at the respondent scale as opposed to the scale of aggregates of respondents. (iv) Criterion-related validity is revisited to stress that invoking the explanative power of test data should draw attention on counterexamples instead of statistical summarization. (v) Finally, it is argued that the justification of the use of test scores in specific settings should be part of the test validation task, because, as tests specialists, psychologists are responsible for proposing their tests for social uses.

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