scholarly journals Вклад газов остаточной атмосферы в поток коллективно ускоренных протонов в диоде Люса

2020 ◽  
Vol 46 (8) ◽  
pp. 7
Author(s):  
В.А. Рыжков ◽  
Г.Е. Ремнев ◽  
И.Н. Пятков ◽  
М.В. Журавлев
Keyword(s):  
Boron Nitride ◽  
Nuclear Reactions ◽  
Water Vapors ◽  
Residual Atmosphere ◽  
Adsorption Of Water

Contribution of gases of residual atmosphere on number of protons collectively accelerated in Luce diode was determined by comparison of the number of protons generated with polyethylene and boron nitride anodes. The proton average number and energy were determined by a use of the radioactivation diagnostics via nuclear reactions 10B(p,α)7Be and 12C(p,γ)13N. It was found that the number of protons collectively accelerated due to adsorption of water vapors and hydrocarbons from the residual camera atmosphere can be comparable with the number of protons accelerated due to sublimation of surface of the polyethylene anode.

scholarly journals Boron Nitride Nanotube Cyclotron Targets for Recoil Escape Production of Carbon-11

Instruments ◽  
2019 ◽  
Vol 3 (1) ◽  
pp. 8 ◽  
Author(s):  
Johanna Peeples ◽  
Sang-Hyon Chu ◽  
James O’Neil ◽  
Mustafa Janabi ◽  
Bruce Wieland ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Nuclear Reactions ◽  
Incident Beam ◽  
Boron Nitride Nanotubes ◽  
Operating Conditions ◽  
Commercial Application ◽  
Physical Damage ◽  
Cyclotron Production ◽  
Beam Currents ◽  
Incident Beam Energy

Boron nitride nanotubes (BNNTs) were investigated as a target media for cyclotron production of 11C for incident beam energy at or below 11 MeV. Both the 11B(p,n)11C and 14N(p,α)11C nuclear reactions were utilized. A sweep gas of nitrogen or helium was used to collect recoil escape atoms with a desired form of 11CO2. Three prototype targets were tested using an RDS-111 cyclotron. Target geometry and density were shown to impact the saturation yield of 11C and percent of yield recovered as carbon dioxide. Physical damage to the BNNT target media was observed at beam currents above 5 μA. Additional studies are needed to identify operating conditions suitable for commercial application of the method.

scholarly journals Laser-initiated primary and secondary nuclear reactions in Boron-Nitride

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
C. Labaune ◽  
C. Baccou ◽  
V. Yahia ◽  
C. Neuville ◽  
J. Rafelski
Keyword(s):  
Boron Nitride ◽  
Nuclear Reactions

Heat of adsorption of water vapors and benzene on high-silicon zeolite of the faujasite type

1987 ◽  
Vol 36 (3) ◽  
pp. 437-444
Author(s):  
M. M. Dubinin ◽  
A. A. Isirikyan ◽  
N. I. Regent ◽  
Kh. K. Baier ◽  
I. M. Belen'kaya
Keyword(s):  
Heat Of Adsorption ◽  
Water Vapors ◽  
Adsorption Of Water ◽  
High Silicon

scholarly journals The Influence of Binding Material on Porous Structure of Shaped Hopcalite

2008 ◽  
Vol 3 (1) ◽  
pp. 67-69
Author(s):  
N.K. Kulikov ◽  
S.G. Kireev ◽  
A.O. Shevchenko ◽  
V.M. Mukhin ◽  
S.N. Tkachenko ◽  
...  
Keyword(s):  
Water Molecule ◽  
Porous Structure ◽  
Bentonite Clay ◽  
Mesoporous Structure ◽  
Monolayer Capacity ◽  
Bentonitic Clay ◽  
Binding Material ◽  
Water Vapors ◽  
Bet Model ◽  
Adsorption Of Water

The authors have investigated the equilibrated adsorption of water vapors on GFG hopcalite, which was obtained using the extrusion shaping method, with bentonite clay as the binding compound. In the frames of the BET model, the values of the monolayer capacity and the size of medium area occupied by the water molecule in the filled monolayer have been determined. The distribution of pores according to their sizes has been evaluated. It has been established that the modification of the bentonitic clay allows directed construction of the hopcalite porous structure,i.e. the formation of the mesoporous structure with a narrow distribution of the pores capacities by sizes, which was achieved varying the sizes of binding compound particles.

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