scholarly journals A study of neutron emission spectra and angular distribution of neutron from (p,n) reaction on some targets of heavy elements

2016 ◽  
Vol 19 (4) ◽  
pp. 131-136
Author(s):  
Thu Thi Ai Nguyen
Keyword(s):  
Angular Distribution ◽  
Neutron Energy ◽  
Nuclear Reactions ◽  
Neutron Emission ◽  
Emission Spectra ◽  
Energy Spectra ◽  
Distribution Data ◽  
Angle Distribution ◽  
Neutron Spectra ◽  
Driven System

For the design of ADS (Accelerator Driven System), it is important to study neutron spectra and details of nuclear reactions induced by neutrons. Furthermore, neutron energy and angular distribution data are important for a correct simulation of the propagation of particles inside a spallation target and the geometrical distribution of the outgoing neutron flux. Many experimental results are available for thin targets and massive targets additional studies of neutron spectra and neutron production were investigated to design target for ADS with incident proton energies up to 3 GeV. In our study, the angular distribution and the neutron energy spectra are reported for the (p,n) reaction on target nuclei such as Pb, U, W with energy from 50 MeV to 350 MeV calculated with database of JENDL-HE 2007. We obtain a set of data about the angular distribution and energy spectra of produced neutrons on some heavy targets with energy ranges as stated above. From the results of neutron spectra, the paper also gives many comments to recommend a choice of materials for target and energies for accelerating proton beam . From the angle distribution of neutrons generated in (p, n) reactions on the different targets with the different energies of proton, the solutions to arrange the reflection bars in reactor proposed. A comparison is also made to improve the reliability for calculation of the paper.

NEUTRONS AND GAMMA RAYS FROM Po210–B10(α,n) AND Po210–B11(α,n) SOURCES

1962 ◽  
Vol 40 (1) ◽  
pp. 33-48 ◽  
Author(s):  
K. W. Geiger ◽  
C. J. D. Jarvis
Keyword(s):  
Neutron Spectrum ◽  
Neutron Energy ◽  
Neutron Emission ◽  
Maximum Energy ◽  
Energy Spectra ◽  
N Sources ◽  
Proton Recoil ◽  
Two Peaks ◽  
Coincidence Measurements ◽  
Competing Reactions

The neutron energy spectra from Po–B10(α,n) and Po–B11(α,n) sources have been determined by the nuclear emulsion method and with a proton recoil spectrometer. Gamma spectra have also been measured. The Po–B10 neutron spectrum extends to an energy of 6.0 Mev and shows two peaks, at 1.0 and 3.0 Mev. The lines in the gamma spectrum are not in coincidence with neutrons but are caused by competing reactions. The Po–B11 neutron spectrum shows one peak at 2.7 Mev; the maximum energy observed is 5.0 Mev. One γ-ray line at 2.32 Mev with an intensity of 5% of the neutron emission rate is detected in the gamma–neutron coincidence measurements. The experimental neutron energy spectra have been compared with calculated spectra and are compatible with the gamma measurements, as well as with published level schemes for the residual N13 and N14 nuclei. In the case of the Po–B10 source only one-third of the neutrons are produced by the B10(α,n)N13 reaction and the remainder has to be accounted for by the B10(α,np)C12 reaction.

scholarly journals An investigation of the neutrons produced in the deuteron-deuteron reaction

1948 ◽  
Vol 195 (1040) ◽  
pp. 123-134 ◽  
Keyword(s):  
Angular Distribution ◽  
Neutron Emission ◽  
Photographic Plate ◽  
Deuteron Beam ◽  
Forward Direction ◽  
Maximum Energy ◽  
Neutron Spectra ◽  
Precision Determination ◽  
Good Agreement

Some properties of the 2 1 H + 2 1 H = 2 He+ 1 0 n reaction are investigated by the photographic plate technique for a bombarding deuteron energy of 920 keV. Thick deuterium targets only are used, and the following quantities measured : ( a ) The Q value—found to be (3·23 ± 0·02) MeV. ( b ) The neutron spectra at various angles of neutron emission. ( c ) The angular distribution of the neutrons. The problems arising in the application of the technique to the precision determination of neutron energy are discussed and the previous precision determination of the Q value by Bonner is criticized. The present results are in good agreement with the Q value of the reaction 2 1 H + 2 1 H = 3 1 H + 1 1 H and the maximum energy of the 3 1 H β-spectrum. The neutron spectra are in accord with those calculated from the ballistics of the reaction and the known excitation function. The neutron angular distribution shows a marked maximum in the forward direction and a minimum at 90° to the deuteron beam.

Simulation and analysis of time-dependent neutron energy spectra

1995 ◽  
Vol 37 (10) ◽  
pp. 1187-1196 ◽  
Author(s):  
B Wolle ◽  
U Gerstel ◽  
K Hubner ◽  
L -G Eriksson ◽  
G Sadler ◽  
...  
Keyword(s):  
Neutron Energy ◽  
Time Dependent ◽  
Energy Spectra

Neutron-Energy Spectra for Fast Reactor Irradiation Effects

1970 ◽  
Vol 9 (4) ◽  
pp. 454-507 ◽  
Author(s):  
D. Okrent ◽  
W. B. Loewenstein ◽  
A. D. Rossin ◽  
A. B. Smith ◽  
B. A. Zolotar ◽  
...  
Keyword(s):  
Neutron Energy ◽  
Fast Reactor ◽  
Energy Spectra ◽  
Reactor Irradiation ◽  
Irradiation Effects

Measurement of neutron energy spectra behind shielding of a 120GeV/c hadron beam facility

2006 ◽  
Vol 562 (2) ◽  
pp. 950-953 ◽  
Author(s):  
Noriaki Nakao ◽  
Shingo Taniguchi ◽  
Sayed H. Rokni ◽  
Stefan Roesler ◽  
Markus Brugger ◽  
...  
Keyword(s):  
Neutron Energy ◽  
Energy Spectra ◽  
Hadron Beam

MCNP simulation of neutron energy spectra for a TN-32 dry shielded container

2008 ◽  
Vol 35 (7) ◽  
pp. 1296-1300 ◽  
Author(s):  
Sylena E. Smith ◽  
Xiaodong Sun ◽  
C. Alan Ford ◽  
Audeen W. Fentiman
Keyword(s):  
Neutron Energy ◽  
Energy Spectra ◽  
Mcnp Simulation
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