Use of γ-ray-generating nuclear reactions for temperature diagnostics of DT fusion plasma

2001 ◽  
Vol 63 (2) ◽  
Author(s):  
V. T. Voronchev ◽  
V. I. Kukulin ◽  
Y. Nakao
Keyword(s):  
Nuclear Reactions ◽  
Fusion Plasma ◽  
Temperature Diagnostics ◽  
Γ Ray

γ-ray multiplicities from nuclear reactions: Theory, instrumentation and analysis

1977 ◽  
Vol 145 (2) ◽  
pp. 295-310 ◽  
Author(s):  
L. Westerberg ◽  
D.G. Sarantites ◽  
R. Lovett ◽  
J.T. Hood ◽  
J.H. Barker ◽  
...  
Keyword(s):  
Nuclear Reactions ◽  
Γ Ray

scholarly journals Determination of Sulfur and Copper Profile with nuclear reactions

2019 ◽  
Vol 10 ◽  
pp. 1
Author(s):  
S. Kossionides ◽  
G. Kaliambakos ◽  
R. Vlastou ◽  
C. T. Papadopoulos
Keyword(s):  
Excited State ◽  
Cross Section ◽  
Ground State ◽  
Nuclear Reactions ◽  
Nuclear Reaction Analysis ◽  
The Third ◽  
First Excited State ◽  
Γ Ray ◽  
Resonant Reaction

The concentration and depth profile of Cu and S in patinna samples have been determined by using Nuclear Reaction Analysis (NRA) and Rutherford Backscattering Spectroscopy (RBS). For the NRA the differential cross section was mesaured for the 1327 keV 7-ray deexciting the third excited state to the ground state of 6 3Cu through the reaction 63Cu(p,p'7), as well as, for the 2230 keV γ-ray deexciting the first excited state to the ground state through the resonant reaction 32S(p,p'7). The mesaurements of both excitation functions were performed in the energy range 3.0 - 3.7 MeV in 20 keV steps and at an angle of 125°.

Kinetic Analysis of γ-Ray-Generating Reactions for Fuel Ion and Energetic Particle Diagnostics of D–T Fusion Plasma

2006 ◽  
Vol 75 (2) ◽  
pp. 024801 ◽  
Author(s):  
Makoto Nakamura ◽  
Yasuyuki Nakao ◽  
Victor T. Voronchev ◽  
Kotaro Hegi ◽  
Hideaki Matsuura ◽  
...  
Keyword(s):  
Kinetic Analysis ◽  
Energetic Particle ◽  
Fusion Plasma ◽  
Particle Diagnostics ◽  
Γ Ray

NUCLEAR PHOTON SCIENCE WITH INVERSE-COMPTON SCATTERING

2009 ◽  
Vol 18 (10) ◽  
pp. 1970-1975
Author(s):  
MAMORU FUJIWARA
Keyword(s):  
Materials Science ◽  
Nuclear Reactions ◽  
Short Pulse ◽  
Medical Science ◽  
High Energy ◽  
Hadron Structure ◽  
Inverse Compton Scattering ◽  
Inverse Compton ◽  
Γ Ray ◽  
New Research

Recent developments of the synchroton radiation facilities and intense lasers are now guiding us to a new research frontier with probes of a high energy GeV photon beam and an intense and short pulse MeV γ-ray beam. New directions of the science developments with photo-nuclear reactions are discussed. The inverse Compton γ -ray has two good advantages for searching for a microscopic quantum world; they are 1) good emmitance and 2) high linear and circular polarizations. With these advantages, photon beams in the energy range from MeV to GeV are used for studying hadron structure, nuclear structure, astrophysics, materials science, as well as for applying medical science.

scholarly journals NUCLEAR REACTIONS IN HOT ASTROPHYSICAL PLASMAS WITH T > 1010 K

2012 ◽  
Vol 21 (01) ◽  
pp. 1250009 ◽  
Author(s):  
ERVIN KAFEXHIU ◽  
FELIX AHARONIAN ◽  
GABRIELA S. VILA
Keyword(s):  
Gamma Ray ◽  
Nuclear Reactions ◽  
Prompt Gamma ◽  
Theoretical Studies ◽  
Light Elements ◽  
Computational Power ◽  
Astrophysical Plasmas ◽  
Recent Developments ◽  
Γ Ray ◽  
Data Banks

The importance of nuclear reactions in low-density astrophysical plasmas with ion temperatures T ≥1010 K has been recognized for more than thirty years. However, the lack of comprehensive data banks of relevant nuclear reactions and the limited computational power have not previously allowed detailed theoretical studies. Recent developments in these areas make it timely to conduct comprehensive studies on the nuclear properties of very hot plasmas formed around compact relativistic objects such as black holes and neutron stars. Such studies are of great interest in the context of scientific programs of future low-energy cosmic γ-ray spectrometry. In this work, using the publicly available code TALYS, we have built a large nuclear network relevant for temperatures exceeding 1010 K. We have studied the evolution of the chemical composition and accompanying prompt gamma-ray emission of such high-temperature plasmas. We present the results on the abundances of light elements D, T, 3 He , 4 He , 6 Li , 7 Li , 9 Be , 10 B , 11 B , and briefly discuss their implications on the astrophysical abundances of these elements.

scholarly journals Measurement of the angular distribution of prompt gamma-rays emitted in the 117Sn(n, γ) reaction for a T-violation search

2019 ◽  
Vol 219 ◽  
pp. 09004 ◽  
Author(s):  
Jun Koga ◽  
Shusuke Takada ◽  
Tamaki Yoshioka ◽  
Hirohiko M. Shimizu ◽  
Katsuya Hirota ◽  
...  
Keyword(s):  
Gamma Rays ◽  
Nuclear Reactions ◽  
P Wave ◽  
Prompt Gamma ◽  
Spin Factor ◽  
Parity Symmetry ◽  
Wave Resonance ◽  
T Violation ◽  
Γ Ray ◽  
Cpt Theorem

It is theoretically suggested that the violation of charge conjugation and parity symmetry (CP-violation) could be enhanced in several compound nuclear reactions. According to the CPT theorem the violation of time-reversal symmetry (T-violation) would be enhanced too. The experimental sensitivity to find a T-violating effect in neutron-induced compound nuclear reactions depends on the value of a spin factor κ(J), which is a parameter specific for each nuclide. It can be determined from the angular dependence of γ-ray emission in (n,γ) reactions induced near a p-wave resonance. In this paper, the measurement result and the analysis status of experiments using the target nucleus 117Sn are reported.

scholarly journals Calibration and Monte-Carlo Simulation of the Detection System PTOLEMEOS

2020 ◽  
Vol 6 ◽  
pp. 152
Author(s):  
K. Spyrou ◽  
C. Chronidou ◽  
S. Harissopulos ◽  
E. Kossionides ◽  
T. Paradellis
Keyword(s):  
Experimental Data ◽  
Monte Carlo Simulation ◽  
Monte Carlo ◽  
Nuclear Reactions ◽  
Detection System ◽  
Efficiency Calibration ◽  
Astrophysical Interest ◽  
Γ Ray

Monte-Carlo simulation and efficiency calibration of the 4π Nal γ-ray detection system PTOLEMEOS is presented. This system is dedicated to the study of nuclear reactions of astrophysical interest. The simulation is evaluated with experimental data.

Angular distribution of proton leakage from a fusion plasma using ultra low-level γ-ray spectrometry

2010 ◽  
Vol 68 (7-8) ◽  
pp. 1226-1230 ◽  
Author(s):  
R. González de Orduña ◽  
M. Hult ◽  
G. Bonheure ◽  
D. Arnold ◽  
H. Dombrowski ◽  
...  
Keyword(s):  
Angular Distribution ◽  
Fusion Plasma ◽  
Low Level ◽  
Proton Leakage ◽  
Γ Ray

scholarly journals Nuclear γ-ray emission from very hot accretion flows

2019 ◽  
Vol 623 ◽  
pp. A174
Author(s):  
E. Kafexhiu ◽  
F. Aharonian ◽  
M. Barkov
Keyword(s):  
Black Hole ◽  
Chemical Composition ◽  
Nuclear Reactions ◽  
High Energy ◽  
Stable Orbit ◽  
Accretion Flow ◽  
Accretion Flows ◽  
Solar Composition ◽  
Γ Ray ◽  
Radial Evolution

Optically thin accretion plasmas can reach ion temperatures Ti ≥ 1010 K and thus trigger nuclear reactions. Using a large nuclear interactions network, we studied the radial evolution of the chemical composition of the accretion flow toward the black hole and computed the emissivity in nuclear γ-ray lines. In the advection dominated accretion flow (ADAF) regime, CNO and heavier nuclei are destroyed before reaching the last stable orbit. The overall luminosity in the de-excitation lines for a solar composition of plasma can be as high as few times 10−5 the accretion luminosity (Ṁc2) and can be increased for heavier compositions up to 10−3. The efficiency of transformation of the kinetic energy of the outflow into high energy (≥100 MeV) γ-rays through the production and decay of π0-mesons can be higher, up to 10−2 of the accretion luminosity. We show that in the ADAF model up to 15% of the mass of accretion matter can “evaporate” in the form of neutrons.

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