Slow-Neutron Ternary Fission of Uranium-235

Nature ◽  
1951 ◽  
Vol 168 (4275) ◽  
pp. 590-591 ◽  
Author(s):  
E. W. TITTERTON
Keyword(s):  
Slow Neutron ◽  
Ternary Fission

A semiconductor device for fast- and slow-neutron dosimetry

1959 ◽  
Vol 106 (16S) ◽  
pp. 735-739
Author(s):  
C.A. Klein ◽  
W.D. Straub
Keyword(s):  
Semiconductor Device ◽  
Slow Neutron ◽  
Neutron Dosimetry

Remarks on the slow neutron scattering by organic molecules

1964 ◽  
Vol 25 (5) ◽  
pp. 641-647 ◽  
Author(s):  
V. Ardente
Keyword(s):  
Neutron Scattering ◽  
Organic Molecules ◽  
Slow Neutron

Rubidium in Barium Stars

2020 ◽  
Author(s):  
M P Roriz ◽  
M Lugaro ◽  
C B Pereira ◽  
N A Drake ◽  
S Junqueira ◽  
...  
Keyword(s):  
Neutron Source ◽  
Slow Neutron ◽  
Asymptotic Giant Branch ◽  
Neutron Density ◽  
Data Sets ◽  
Agb Stars ◽  
Branching Points ◽  
Theoretical Predictions ◽  
Low Mass ◽  
Chemically Peculiar Stars

Abstract Barium (Ba) stars are chemically peculiar stars that display in their atmospheres the signature of the slow neutron-capture (the s-process) mechanism that occurs in asymptotic giant branch (AGB) stars, a main contributor to the cosmic abundances. The observed chemical peculiarity in these objects is not due to self-enrichment, but to mass transfer between the components of a binary system. The atmospheres of Ba stars are therefore excellent astrophysical laboratories providing strong constraints for the nucleosynthesis of the s-process in AGB stars. In particular, rubidium (Rb) is a key element for the s-process diagnostic because it is sensitive to the neutron density and therefore its abundance can reveal the main neutron source for the s-process in AGB stars. We present Rb abundances for a large sample of 180 Ba stars from high resolution spectra (R = 48000), and we compare the observed [Rb/Zr] ratios with theoretical predictions from AGB s-process nucleosynthesis models. The target Ba stars in this study display [Rb/Zr] <0, showing that Rb was not efficiently produced by the activation of branching points. Model predictions from the Monash and FRUITY data sets of low-mass (≲ 4 M⊙) AGB stars are able to cover the Rb abundances observed in the target Ba stars. These observations indicate that the 13C(α,n)16O reaction is the main neutron source of the s-process in the low-mass AGB companions of the observed Ba stars. We have not found in the present study candidate companion for IR/OH massive AGB stars.

Slow Neutron Resonances inIn113andIn115

1952 ◽  
Vol 87 (1) ◽  
pp. 161-162 ◽  
Author(s):  
V. L. Sailor ◽  
L. B. Borst
Keyword(s):  
Slow Neutron

Critical phenomena in a polymer-solvent system: slow neutron transmission technique

Polymer ◽  
1988 ◽  
Vol 29 (6) ◽  
pp. 1010-1015 ◽  
Author(s):  
Yu.B. Mel'nichenko ◽  
V.V. Klepko ◽  
V.V. Shilov
Keyword(s):  
Critical Phenomena ◽  
Slow Neutron ◽  
Solvent System ◽  
Neutron Transmission ◽  
Transmission Technique ◽  
Polymer Solvent

Nevis Synchrocyclotron Slow Neutron Velocity Spectrometer

1960 ◽  
Vol 31 (5) ◽  
pp. 481-489 ◽  
Author(s):  
J. Rainwater ◽  
W. W. Havens ◽  
J. S. Desjardins ◽  
J. L. Rosen
Keyword(s):  
Slow Neutron

Measurement of the slow neutron spectrum in a physical mock up of the reactor in the I. V. Kurchatov beloyarskoe GR power station

1963 ◽  
Vol 15 (6) ◽  
pp. 1266-1270
Author(s):  
Yu. Yu. Glazkov ◽  
B. G. Dubovskii ◽  
G. A. Ilyasova ◽  
V. I. Kozlov ◽  
V. V. Smelov ◽  
...  
Keyword(s):  
Neutron Spectrum ◽  
Slow Neutron ◽  
Power Station

scholarly journals RELATIVE MOTION CORRECTION TO FISSION BARRIERS

2008 ◽  
Vol 17 (01) ◽  
pp. 151-159 ◽  
Author(s):  
J. SKALSKI
Keyword(s):  
Relative Motion ◽  
Cluster Model ◽  
Motion Correction ◽  
Mean Field Theory ◽  
Mean Field ◽  
Ternary Fission ◽  
Skyrme Interaction ◽  
Hartree Fock ◽  
Fission Barriers ◽  
The Mean

We discuss the effect of kinetic energy of the relative motion becoming spurious for separate fragments on the selfconsistent mean-field fission barriers. The treatment of the relative motion in the cluster model is contrasted with the necessity of a simpler and approximate approach in the mean-field theory. A scheme of the energy correction to the Hartree-Fock is proposed. The results obtained with the effective Skyrme interaction SLy 6 show that the correction, previously estimated as ~ 8 MeV in A = 70 - 100 nuclei, amounts to 4 MeV in the medium heavy nucleus 198 Hg and to null in 238 U . However, the corrected barrier implies a shorter fission half-life of the latter nucleus. The same effect is expected to lower barriers for multipartition (i.e. ternary fission, etc) and make hyperdeformed minima less stable.

Slow Neutron Resonances of Antimony

1972 ◽  
Vol 33 (5) ◽  
pp. 1185-1196 ◽  
Author(s):  
Makio Ohkubo ◽  
Yutaka Nakajima ◽  
Akira Asami ◽  
Toyojiro Fuketa
Keyword(s):  
Slow Neutron
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