Nuclear moment determination of ?-emitting nuclei by use of nuclear reactions initiated with fast polarized beams

1976 ◽  
Vol 2 (1) ◽  
pp. 315-320 ◽  
Author(s):  
T. Minamisono ◽  
J. W. Hugg ◽  
D. G. Mavis ◽  
T. K. Saylor ◽  
S. M. Lazarus ◽  
...  
Keyword(s):  
Nuclear Reactions ◽  
Nuclear Moment ◽  
Polarized Beams

scholarly journals Study of the 232Th(n,f) Cross section at NCSR ‘Demokritos’ using Micromegas Detectors

2020 ◽  
Vol 27 ◽  
pp. 106
Author(s):  
Sotirios Chasapoglou ◽  
A. Tsantiri ◽  
A. Kalamara ◽  
M. Kokkoris ◽  
V. Michalopoulou ◽  
...  
Keyword(s):  
Cross Section ◽  
Cross Sections ◽  
Nuclear Reactions ◽  
Detection Efficiency ◽  
High Energy ◽  
Tandem Accelerator ◽  
Line Detector ◽  
Accelerator Driven Systems ◽  
The Masses

The accurate knowledge of neutron-induced fission cross sections in actinides, is of great importance when it comes to the design of fast nuclear reactors, as well as accelerator driven systems. Specifically for the 232Th(n,f) case, the existing experimental datasets are quite discrepant in both the low and high energy MeV regions, thus leading to poor evaluations, a fact that in turn implies the need for more accurate measurements.In the present work, the total cross section of the 232Th(n,f) reaction has been measured relative to the 235U(n,f) and 238U(n,f) ones, at incident energies of 7.2, 8.4, 9.9 MeV and 14.8, 16.5, 17.8 MeV utilizing the 2H(d,n) and 3H(d,n) reactions respectively, which generally yield quasi-monoenergetic neutron beams. The experiments were performed at the 5.5 MV Tandem accelerator laboratory of N.C.S.R. “Demokritos”, using a Micromegas detector assembly and an ultra thin ThO2 target, especially prepared for fission measurements at n_ToF, CERN during its first phase of operations, using the painting technique. The masses of all actinide samples were determined via α-spectroscopy. The produced fission yields along with the results obtained from activation foils were studied in parallel, using both the NeusDesc [1] and MCNP5 [2] codes, taking into consideration competing nuclear reactions (e.g. deuteron break up), along with neutron elastic and inelastic scattering with the beam line, detector housing and experimental hall materials. Since the 232Th(n,f) reaction has a relatively low energy threshold and can thus be affected by parasitic neutrons originating from a variety of sources, the thorough characterization of the neutron flux impinging on the targets is a prerequisite for accurate cross-section measurements, especially in the absence of time-of-flight capabilities. Additional Monte-Carlo simulations were also performed coupling both GEF [3] and FLUKA [4] codes for the determination of the detection efficiency.

scholarly journals Zirconium and Yttrium (p, d) Surrogate Nuclear Reactions: Measurement and determination of gamma-ray probabilities: Experimental Physics Report

2017 ◽  
Author(s):  
J. T. Burke ◽  
R. O. Hughes ◽  
J. E. Escher ◽  
N. D. Scielzo ◽  
R. J. Casperson ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Nuclear Reactions ◽  
Experimental Physics

Determination of Angular-Momentum Transfers for (d, α) Reactions Using Polarized Beams

1978 ◽  
Vol 40 (7) ◽  
pp. 441-444 ◽  
Author(s):  
E. J. Ludwig ◽  
T. B. Clegg ◽  
W. W. Jacobs ◽  
S. A. Tonsfeldt
Keyword(s):  
Angular Momentum ◽  
Polarized Beams

scholarly journals A determination of αstrong with transversally polarized beams at LEP1

1990 ◽  
Vol 241 (2) ◽  
pp. 260-266 ◽  
Author(s):  
A. Djouadi ◽  
F.M. Renard ◽  
C. Verzegnassi
Keyword(s):  
Polarized Beams

Determination of the composition of homogeneous light element binary compounds using charged-particle-induced nuclear reactions

1981 ◽  
Vol 82 ◽  
pp. 105-112 ◽  
Author(s):  
G. Blondiaux ◽  
M. Valladon ◽  
J.L. Debrun ◽  
P. Benaben ◽  
M. Bouchacourt ◽  
...  
Keyword(s):  
Charged Particle ◽  
Nuclear Reactions ◽  
Light Element ◽  
Binary Compounds

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°.

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