Absolute neutron emission rate measurement of a 252Cf source by the manganous sulfate bath method

In this work a De Pangher Long Counter used as a secondary standard for calibration of neutron moderador detectors was calibrated.A 5 Ci Am-Be standard source calibrated for neutron emission rate by the manganese sulfate bath method was used as a primary standard. Due to the cylindrical shape of the standard source an anisotropy factor was determined. The scattering effects were experimentally determined using the shadow cone method and reproducibility tests were also donne.

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Size distribution and emission rate measurement of fine and ultrafine particle from indoor human activities

Atmospheric Environment ◽

10.1016/j.atmosenv.2008.07.021 ◽

2008 ◽

Vol 42 (35) ◽

pp. 8341-8352 ◽

Cited By ~ 72

Author(s):

Evelyne Géhin ◽

Olivier Ramalho ◽

Séverine Kirchner

Keyword(s):

Size Distribution ◽

Human Activities ◽

Emission Rate ◽

Ultrafine Particle ◽

Rate Measurement

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Characterization of the New Vertical Neutron Camera Designed for the Low Neutron Emission Rate Plasma in Large Helical Device

Plasma and Fusion Research ◽

10.1585/pfr.16.1402039 ◽

2021 ◽

Vol 16 (0) ◽

pp. 1402039-1402039

Author(s):

Siriyaporn SANGAROON ◽

Kunihiro OGAWA ◽

Mitsutaka ISOBE ◽

Yutaka FUJIWARA ◽

Hiroyuki YAMAGUCHI ◽

...

Keyword(s):

Emission Rate ◽

Neutron Emission

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Improvement in the calibration time of absolute emission rate of radioisotopic neutron sources using vanadyl sulfate bath

Applied Radiation and Isotopes ◽

10.1016/j.apradiso.2012.06.027 ◽

2012 ◽

Vol 70 (10) ◽

pp. 2446-2450 ◽

Cited By ~ 2

Author(s):

Rahim Khabaz

Keyword(s):

Emission Rate ◽

Vanadyl Sulfate ◽

Neutron Sources ◽

Sulfate Bath ◽

Calibration Time

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ABSOLUTE STANDARDIZATION OF RADIOACTIVE NEUTRON SOURCES: II. THE USE OF THE F19(α, n)Na22 REACTION

Canadian Journal of Physics ◽

10.1139/p59-062 ◽

1959 ◽

Vol 37 (5) ◽

pp. 550-556 ◽

Cited By ~ 7

Author(s):

K. W. Geiger

Keyword(s):

Nuclear Reactions ◽

Emission Rate ◽

Neutron Emission ◽

National Research Council ◽

Neutron Output ◽

Neutron Sources ◽

Neutron Thermalization ◽

Γ Rays ◽

Absolute Standardization ◽

Good Agreement

Fluorine has only one stable isotope, F19. If neutrons are produced by the F19(α, n)Na22 reaction the neutron output can be calculated from the yield of the resulting radioactive Na22. The growth of Na22 (half-life, 2.58 years) has been measured in a neutron source consisting originally of 1.6 curies Po210 mixed with CaF2 powder. Since Na22 is a positron emitter, discrimination against γ-rays from Po210 and from nuclear reactions could be achieved by detecting the two positron annihilation quanta in coincidence. The Na22 growth has been followed over 20 months and is in agreement with the theoretical growth curve. Comparison with a calibrated Na22 source yielded a neutron emission rate of (10.70 ± 0.25) × 104 sec−1. This resulted in a neutron emission rate of (3.16 ± 0.10) × 106 sec−1 for the Ra-α-Be source of the National Research Council, in good agreement with (3.22 ± 0.05) × 106 sec−1 obtained by a neutron thermalization method.

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Pre-saddle and pre-scission neutron emission rates in heavy-ion induced fission of 16O +208Pb and 16O +209Bi systems

International Journal of Modern Physics E ◽

10.1142/s0218301319500137 ◽

2019 ◽

Vol 28 (03) ◽

pp. 1950013

Author(s):

Saeed Soheyli ◽

Morteza Khalil Khalili ◽

Ghazaaleh Ashrafi

Keyword(s):

Emission Rate ◽

Neutron Emission ◽

Nonlinear Behavior ◽

Heavy Ion ◽

Neutron Multiplicity ◽

Emission Rates ◽

Reaction Systems ◽

Initial Excitation ◽

Induced Fission ◽

First Time

Whereas there is a slight information on the pre-saddle neutron emission rate and neutron multiplicity, as well as it is impossible to separate the pre-saddle and saddle to scission neutron contributions experimentally, the theoretical studies of pre-saddle neutron emission rate and neutron multiplicity are of great importance. In the present work, the calculations of pre-saddle neutron multiplicity are performed using the analysis of fission fragment angular anisotropy data for [Formula: see text] and [Formula: see text] reaction systems. The obtained results show that the pre-saddle neutron multiplicity decreases by increasing the initial excitation energy and it has found to be characterized by a nonlinear behavior. Through the analysis of pre-saddle neutron multiplicity and pre-saddle transition time by means of the neutron clock method, the pre-saddle neutron emission rate is calculated for the first time. The findings of this study show that the pre-scission neutron emission rate is lower than the pre-saddle neutron emission rate.

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