國立高雄大學圖資館 |

Language: English

Back

Fission neutronsexperiments, evaluat...

Kornilov, Nikolay.

Fission neutronsexperiments, evaluation, modeling and open problems /

Record Type:	Electronic resources : Monograph/item
Title/Author:	Fission neutronsby Nikolay Kornilov.
Reminder of title:	experiments, evaluation, modeling and open problems /
Author:	Kornilov, Nikolay.
Published:	Cham :Springer International Publishing :2015.
Description:	vi, 132 p. :ill. (some col.), digital ;24 cm.
Contained By:	Springer eBooks
Subject:	Nuclear fission.
Online resource:	http://dx.doi.org/10.1007/978-3-319-07133-6
ISBN:	9783319071336 (electronic bk.)

Fission neutronsexperiments, evaluation, modeling and open problems /
Kornilov, Nikolay.

Fission neutronsexperiments, evaluation, modeling and open problems /[electronic resource] :by Nikolay Kornilov. - Cham :Springer International Publishing :2015. - vi, 132 p. :ill. (some col.), digital ;24 cm.

Introduction -- Experiments -- 2. Microscopic experiments -- Method based on fission event counting -- Neutron spectroscopy by Time of Flight Method (TOF) -- Time correlated background -- Time shift in neutron detector -- Neutron-gamma discrimination and its influence on results -- Measurement of the neutron detector efficiency -- Time resolution and "bin" corrections -- Additional time spread for "solid sample" experiment at low input energy -- Possible distortion factors in 2nd type experiment -- The calculation of the detector efficiency with high accuracy up to 20MeV -- Correction for neutron scattering in FF detector -- Multi detectors systems and "cross talk correction" -- Macroscopic experiments -- 3. Microscopic spectra evaluation. Semi-empirical modeling -- Maxwellian function and Terrell's systematic -- 252Cf spectrum evaluation -- Two Watt Spectra (TWS) approach -- Maxwellian together with power expansion for 235U(th) -- Scale Method -- PFNS for multiple chance fission -- 4. Models for neutron emission in fission -- Basis for theoretical modeling -- True or plausible results? -- Model realized in code FINE (FIssion Neutron Emission) -- Estimation of the two-dimensional Y(A,TKE) distribution -- Neutron emission from excited fragments -- Monte Carlo simulation of energy-angular distribution. Verification -- Level Density verification -- Comparison experimental and calculated results -- 5. Achievements and still open problems -- Real achievements -- Mechanism of neutron emission in fission -- Left-right and angular effects for fission neutron emission at 0.5 MeV input energy -- Contradiction between Microscopic and Macroscopic experiments (Mic-Mac problem) -- New experimental proposal.

Although the fission of heavy nuclei was discovered over 75 years ago, many problems and questions still remain to be addressed and answered. The reader will be presented with an old, but persistent problem of this field: The contradiction between Prompt Fission Neutron (PFN) spectra measured with differential (microscopic) experiments and integral (macroscopic and benchmark) experiments (the Micro-Macro problem). The difference in average energy is rather small ~3% but it is stable and we cannot explain the difference due to experimental uncertainties. Can we measure the PFN spectrum with high accuracy? How may we compare results of different experiments to provide better accuracy? Are our traditional theoretical models correct? What can be done to solve the Micro-Macro problem in future? These questions are discussed in this monograph for the reader. The current work will be of interest to graduate students and researchers, particularly those working in nuclear and neutron physics.

ISBN: 9783319071336 (electronic bk.)

Standard No.: 10.1007/978-3-319-07133-6doiSubjects--Topical Terms:

265560
Nuclear fission.

LC Class. No.: QC790

Dewey Class. No.: 539.627

Fission neutronsexperiments, evaluation, modeling and open problems /
LDR:03674nmm a2200313 a 4500 001 459554
003 DE-He213
005 20150514132410.0
006 m d
007 cr nn 008maaau
008 151110s2015 gw s 0 eng d
020 $a 9783319071336 (electronic bk.)
020 $a 9783319071329 (paper)
024 7 $a 10.1007/978-3-319-07133-6 $2 doi
035 $a 978-3-319-07133-6
040 $a GP $c GP
041 0 $a eng
050 4 $a QC790
072 7 $a PHP $2 bicssc
072 7 $a SCI051000 $2 bisacsh
082 0 4 $a 539.627 $2 23
090 $a QC790 $b .K84 2015
100 1 $a Kornilov, Nikolay. $3 710398
245 1 0 $a Fission neutrons $h [electronic resource] : $b experiments, evaluation, modeling and open problems / $c by Nikolay Kornilov.
260 $a Cham : $b Springer International Publishing : $b Imprint: Springer, $c 2015.
300 $a vi, 132 p. : $b ill. (some col.), digital ; $c 24 cm.
505 0 $a Introduction -- Experiments -- 2. Microscopic experiments -- Method based on fission event counting -- Neutron spectroscopy by Time of Flight Method (TOF) -- Time correlated background -- Time shift in neutron detector -- Neutron-gamma discrimination and its influence on results -- Measurement of the neutron detector efficiency -- Time resolution and "bin" corrections -- Additional time spread for "solid sample" experiment at low input energy -- Possible distortion factors in 2nd type experiment -- The calculation of the detector efficiency with high accuracy up to 20MeV -- Correction for neutron scattering in FF detector -- Multi detectors systems and "cross talk correction" -- Macroscopic experiments -- 3. Microscopic spectra evaluation. Semi-empirical modeling -- Maxwellian function and Terrell's systematic -- 252Cf spectrum evaluation -- Two Watt Spectra (TWS) approach -- Maxwellian together with power expansion for 235U(th) -- Scale Method -- PFNS for multiple chance fission -- 4. Models for neutron emission in fission -- Basis for theoretical modeling -- True or plausible results? -- Model realized in code FINE (FIssion Neutron Emission) -- Estimation of the two-dimensional Y(A,TKE) distribution -- Neutron emission from excited fragments -- Monte Carlo simulation of energy-angular distribution. Verification -- Level Density verification -- Comparison experimental and calculated results -- 5. Achievements and still open problems -- Real achievements -- Mechanism of neutron emission in fission -- Left-right and angular effects for fission neutron emission at 0.5 MeV input energy -- Contradiction between Microscopic and Macroscopic experiments (Mic-Mac problem) -- New experimental proposal.
520 $a Although the fission of heavy nuclei was discovered over 75 years ago, many problems and questions still remain to be addressed and answered. The reader will be presented with an old, but persistent problem of this field: The contradiction between Prompt Fission Neutron (PFN) spectra measured with differential (microscopic) experiments and integral (macroscopic and benchmark) experiments (the Micro-Macro problem). The difference in average energy is rather small ~3% but it is stable and we cannot explain the difference due to experimental uncertainties. Can we measure the PFN spectrum with high accuracy? How may we compare results of different experiments to provide better accuracy? Are our traditional theoretical models correct? What can be done to solve the Micro-Macro problem in future? These questions are discussed in this monograph for the reader. The current work will be of interest to graduate students and researchers, particularly those working in nuclear and neutron physics.
650 0 $a Nuclear fission. $3 265560
650 0 $a Neutrons. $3 267018
650 1 4 $a Physics. $3 179414
650 2 4 $a Particle and Nuclear Physics. $3 456401
650 2 4 $a Nuclear Chemistry. $3 276243
650 2 4 $a Atomic/Molecular Structure and Spectra. $3 455686
710 2 $a SpringerLink (Online service) $3 273601
773 0 $t Springer eBooks
856 4 0 $u http://dx.doi.org/10.1007/978-3-319-07133-6
950 $a Physics and Astronomy (Springer-11651)