International Atomic Energy Agency
1 1
Asian Collaboration in Nuclear Reaction Data Measurements and Compilation
N. Otsuka IAEA Nuclear Data Section
2012-08-27 N.Otsuka: Asian Collaboration in Nuclear
Reaction Data Measurements and Compilation
International Atomic Energy Agency
A Centre in both Experiment and Theory - Pohang -
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
2
Asia Pacific Center for Theoretical Physics APCTP (Asian version of ISTC, Trieste)
International Atomic Energy Agency
Table of Contents
1. Progress in EXFOR compilation by Asian NRDC Centres
2. Some EXFOR experiences with “other” Asian countries
3. Progres in Experimental Covariance
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
3
International Atomic Energy Agency
Nuclear Reaction Data Centres (NRDC)
14 centres from 8 countries and 2 international organisations (China, Hungary, India, Japan, Korea, Russia, Ukraine, USA, NEA, IAEA)
Coordinated by IAEA Nuclear Data Section
13 NRDC Centres are contributing to EXFOR database.
International Atomic Energy Agency
Annual NRDC Meeting
16 – 19, April, 2012, hosted by OECD Nuclear Energy Agency
International Atomic Energy Agency
Definition of “Asian Countries”
Armenia (4ARM) Korea, Republic of (3KOR)
Bangladesh (3BAN) Malaysia (3MAL)
China (3CRP) Mongolia (3MGL)
Georgia (4GRG) Pakistan (3PAK)
Hong Kong* (3HKG) Saudri Arabia (3SAR)
India (3IND) Sylia (3SY)
Iran (3IRN) China, Taiwan* (3CHF)
Israel (3ISL) Thailand (3TAI)
Japan (2JPN) Turkey (2TUK)
Jordan (3JOR) Uzbekistan (4UZ)
Kazakhstan (4KAS) Vietnam (3VN)
Korea, Dem.People's Rep.* (3KDR)
*: not an IAEA Member State
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
6
Asian area defined by UN
Corresponding countries etc. seen in EXFOR entries (=23)
International Atomic Energy Agency
1. Progress in EXFOR compilation by Asian NRDC Centres (CNDC, JCPRG, KAERI, NDPCI)
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
7
International Atomic Energy Agency
Exp. at Neutron Charged-particle
Heavy-ion Photon
China CNDC (Beijing)
India NDPCI (Mumbai+)
Japan NEA DB (Paris) JCPRG (Sapporo)
Kazakhstan CJD (Obninsk) CAJaD (Moscow) ?
Korea KAERI (Daejeon)
Mongolia NDS (Vienna)
Vietnam NDS (Vienna)
Definition of “Asian Entries”
Asian entries (in this talk ) = Experimental works compiled by Asian NRDC Centres
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
8
International Atomic Energy Agency
CNDC JCPRG KAERI NDPCI Asia
(Sum) World
2001 7 5 0 0 12 419
2002 1 54 0 0 55 414
2003 4 93 0 0 97 535
2004 0 72 0 0 72 848
2005 2 100 0 0 102 937
2006 21 80 0 10 111 680
2007 0 149 0 34 183 718
2008 0 22 0 15 37 660
2009 11 104 7 63 185 745
2010 19 50 10 12 91 470
2011 9 42 8 55 114 507
2012 3 6 0 2 11 120
EXFOR Entries - Asia and World (2001-2012+)
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
9
International Atomic Energy Agency
How to Count Entries?
Experiment
EXFOR (prelim.)
EXFOR Database
Publication
Compilation
Review, correction
Users!
Articles
Only entries available to EXFOR users are counted (in this talk).
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
10
International Atomic Energy Agency
EXFOR Entries - Asia and World (2001-2012+)
0
100
200
300
400
500
600
700
800
900
1000
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
year of compilation
num
ber
of e
ntr
ies
Asia
World
Asia/World
0
5
10
15
20
25
30
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
year of compilation
ratio (%)
Asia = Data compiled by Asian NRDC Centres
(~15% contribution to the EXFOR library)
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
11
International Atomic Energy Agency
EXFOR Entries – Asia and World (2001-2012+) neutron data
0
50
100
150
200
250
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
year of compilation
num
ber
of e
ntries
charged-particle
0
100
200
300
400
500
600
700
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
heavy-ion (A>4)
0
20
40
60
80
100
120
140
160
180
200
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
gamma
0
10
20
30
40
50
60
70
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
Neutron CP (p,d,t,3He,α)
Heavy-Ion (HI; A>4) photonuclear (g)
250 700
200 70
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
12
International Atomic Energy Agency
EXFOR Entries within Asia (2001-2012+)
0
10
20
30
40
50
60
70
80
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
year of compilation
num
ber
of e
ntries
CNDC
JCPRG/2
NDPCI
KAERI
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
13
Indian odd-even structure due to X4 workshop
International Atomic Energy Agency
KAERI
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
year of compilation
num
ber
of e
ntries
(g)
(hi)
(cp)
(n)
NDPCI
0%
20%
40%
60%
80%
100%
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
year of compilation
num
ber
of e
ntries
(g)
(hi)
(cp)
(n)
CNDC
0%
20%
40%
60%
80%
100%
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
year of compilation
num
ber
of e
ntries
(g)
(hi)
(cp)
(n)
JCPRG
0%
10%
20%
30%
40%
50%
60%
70%
80%
90%
100%
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012
year of compilation
num
ber
of e
ntries
(g)
(hi)
(cp)
(n)
EXFOR Entries from Asia (2001-2012+) - Projectile CNDC JCPRG
NDPCI KAERI
γ hi cp n
cp: p, d, t, 3He, α (incl. inverse kinematics); hi: A>4
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
14
International Atomic Energy Agency
Current Flow of Asian Entries
2012-08-27 N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
15
Zhang
Tao
Wang
Chen
Chen
Makinaga
Odsuren
Furutachi Dagvadorj
Tsubakihara Vidya
Ghosh
Mandal
Badwar
Furutachi (Makinaga)
Lalremruata
Yang Compiler
Regional Liaison
Otsuka
Liasion (Vienna)
International Atomic Energy Agency
My First Work with Rema (=Prof. Lalremruata)
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
16
120Sn(n,p)120Inx
ENSDF evaluation (by Japanese group)
International Atomic Energy Agency
2. Recent experiences with “other” Asian countries (Kazakhstan, Mongolia, Vietnam)
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
17
International Atomic Energy Agency
Kazakhstan (and Uzbekistan)
A productive country of former USSR area
(~28 EXFOR entries for articles published in 1992-2012)
Inst. Yad. Fiz. (Almaty, 4KASKAZ) • U-150M cyclotron (E~<60 MeV, N. Burtebaev et al.)
• UKP-2-1 Tandem(?) (proton capture, keV)
• DG-60 cyclotron (1.7MeV/A for A/Z=6~12)
• WWR-K reactor (spectrometry by fast neutron)
Inst. Yad. Fiz. (Tashkent,4UZ UZB) • SB-50 betatron (Bremsstrahlung photon, S.R. Palvanov et al.)
• Cyclotron
• NG150 neutron generator (n,2n isomeric ratio)
• VVR-SM reactor (fission yield)
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
18
International Atomic Energy Agency
Levkovskij’s Proton and Alpha Activation Data (Very famous charged-particle activation experiment)
• Measured at Almaty, published in 1991 (by Levkovskij’s son). • 540 excitation functions of (p,x) and (α,x) isotope production. • Most frequently used Kazakh data compiled in EXFOR. • Good agreement with later measurements (after a common factor)
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
19
International Atomic Energy Agency
Data Missing in EXFOR from KazSSR+UzSSR
• EXFOR completeness check for light-ion induced reaction activation cross section excitation functions (with Sapporo and Moscow). • ~300 articles are identified as missing experimental works in EXFOR.
• 4 are from Almaty, 2 are from Tashkent. (published in 80s and 90s)
• IZV AN KazSSR and UzSSR not available in Kurchatov Inst.
• No English translation?
• Need to scan other literature?
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
20
International Atomic Energy Agency
Mongolia
• My predecessor (Dr. Otto Schwerer) visited NRC of Nat. Univ. Mongolia in Sept. 13-16 2006 on first steps towards the establishment of a Mongolian nuclear data centre.
• He had discussion with S. Davaa, S. Lodoysamba, G. Khuukhenkhuu,..., M. Odsuren, B.Munkhbat, M. Altangerel, and ,D. Ichinkhorloo.
• He reported that decay and structure data evaluation for ENSDF could become a main activity of the data centre.
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
21
International Atomic Energy Agency
48Ti(n,n’γ948) Cross Section by Dashdorj et al.
48Ti(n,n’γ948) Cross Section as New Standard (S. Simakov, R. Nelson et al.)
•non interference from background gammas
•stable material (metal), 0.1< Eγ<1.5 MeV
•σ > 200 mb
•smooth
•abundant isotope (73.72%)
•low activated
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
22
1 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.90.0
0.2
0.4
0.6
0.8
1.0
1.2
GMA
JEFF-3.1.2
Talys (opt.)
smoothed
by 60keV
Talys (def.)
Konobeevski73_g984thick
Konobeevski73_g984thin
Korzh77_nn984
Barnard74_Ti48nn1@2
Barnard74_Ti48nn1good@2
Guenther78_Ti48nn1@2
Lashuk94_Ti48g982
Dashdorj07_g984
Broder65_Ti48nn1
(n
,n'
), b
Neutron Energy, MeV
48Ti(n,n
1
984) ENDF/B-VII.1
0.00
0.50
1.00
1.50 Talys(opt) a priori
GMA (posteriori):
48Ti(n,n'
984)
Dashdorj'07
Exp.
Exp+Talys(opt)
+TENDL(cov)
(n
,n'
984)
1 10 200.00
0.05
Neutron Energy, MeV
Figures prepared by Simakov For ICNRM-13, June 2012, Valenna, Italy
International Atomic Energy Agency
Duplication of Dashdorj’s Data in EXFOR
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
23
Reaction
Source 1 Source 2 Ref. EXFOR pts. Emin
MeV
Emax
MeV
Ref. EXFOR pts. Emin
MeV
Emax
MeV
150Sm(n,n’γ)150Sm [1] 14148.003 78 1.08 33.1 [2] 14177.002 66 0.97 33.1 [1] 14148.004 81 1.01 33.1 [2] 14177.003 48 1.68 33.1
150Sm(n,2n)149Sm [3] 14266.002 17 8.66 33.1 [4] 13996.003 16 9.31 19.8 48Ti(n,x+γ)45Ca [5] 14162.119 90 1.01 174 [6] 13997.005 41 1.01 19.6 48Ti(n,n’+γ)48Ti [5] 14162.002-005, 029-067 3864 1.01 240 [6] 13997.002 4121 1.01 19.6 48Ti(n,2n+γ)47Ti [5] 14162.006-009, 069-098 800 10.5 240 [6] 13997.003 150 10.5 19.6 48Ti(n,p+γ)48Sc [5] 14162.014-017,099-103 480 1.05 174 [6] 13997.004 280 1.01 19.6
pts: Number of data points; Emin, Emax: minimum and maximum boundary of incident neutron energies References [1] D. Dashdorj et al., Nucl. Instrum. Meth B 261(2007)948 (EXFOR 14148). Data were received from the author. [2] D. Dashdroj et al., AIP Conf.Ser.1005(2007)164 (EXFOR 14177). Data were digitized from Fig.2-3. [3] D. Dashdroj et al., Nucl. Instrum. Meth. B268(2010)114 (EXFOR 14266).Data were taken from Table 1. [4] J.R. Cooper et al., Report UCRL-TR-205760 (2004) (EXFOR 13996). Data were taken from Table 2. [5] D. Dashdorj et al., Nucl. Sci. Eng. 157(2007)65 (EXFOR 14162). Data were received from the author. [6] D. Dashdorj et al., Report UCRL-TR-209474 (2005) (EXFOR 13997). Data were taken from Tables 8 - 99.
• Which sets must be used by EXFOR users? (I do not know him in person ...) • EXFOR contact person in each EXFOR country? (“Mini Centre”)
International Atomic Energy Agency
Vietnam
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
24
ENTRY 31715 20110923 20120207 20120113 315331715000 1
SUBENT 31715001 20110923 20120207 20120113 315331715001 1
BIB 14 31 31715001 2
TITLE Measurement of thermal neutron cross-section and 31715001 3
resonance integrals of the 69Ga(n,g)70Ga and 31715001 4
71Ga(n,g)72Ga reactions at Dalat Research Reactor 31715001 5
AUTHOR (P.N.Son, T.T.Anh, C.D.Vu, V.H.Tan) 31715001 6
INSTITUTE (3VN DAL) 31715001 7
(3VN VN) Vietnam Atomic Energy Institute, Hanoi 31715001 8
REFERENCE (J,KPS,59,1757,2011) 31715001 9
FACILITY (REAC,3VN DAL) Dalat Research Reactor 31715001 10
INC-SOURCE (THCOL) Thermal neutron channel 31715001 11
METHOD (ACTIV) Irradiated for 31715001 12
5 min (Ga+Au, with Cd cover), 31715001 13
10 min (Ga+Au, without Cd cover), 31715001 14
1 hrs (Au/Zr/W/Co, with Cd cover), 31715001 15
6 hrs (Au/Zr/W/Co w/o Cd cover). 31715001 16
SAMPLE Ga (99.95%, 2 mm x 4 mm, 0.5 mm in thickness), 31715001 17
DETECTOR (HPGE) 58% efficiency relative to 7.6 cm x 7.6 cm 31715001 18
NaI(Tl) detector, 1.9 keV energy resolution at 31715001 19
1.33 MeV. 31715001 20
DECAY-MON (79-AU-198,2.69517D,DG,411.8,0.960) 31715001 21
CORRECTION Corrected for 31715001 22
- Epithermal spectrum shape parameter 31715001 23
(alpha=0.164+/-0.013) determined by Au/Al wire, 31715001 24
Co/Al wire, W foil, Zr foil 31715001 25
- Neutron self-shielding correction factors (Gth,Gepi) 31715001 26
ERR-ANALYS (ERR-T) Uncertainties are due to 31715001 27
(MONIT-ERR) Reference value (0.1%-1.8%) 31715001 28
(ERR-S,0.1,1.2) - statistics (0.1%-1.2%) 31715001 29
(ERR-1) - gamma-ray detector efficiency (2.5%) 31715001 30
(ERR-2) - epithermal shape parameter (7.9%) 31715001 31
STATUS (APRVD) Approved by Pham Ngoc Son (2011-09-27) 31715001 32
HISTORY (20110923C) On 31715001 33
ENDBIB 31 31715001 34
NOCOMMON 0 0 31715001 35
ENDSUBENT 34 3171500199999
ENDENTRY 1 3171599999999
Two EXFOR entries
(31713, 31715) for neutron
cross section data from Dalat
(presented at ND2010 Conf.)
International Atomic Energy Agency
Neutron Flux Monitor
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
25
Sensitive to epithermal neutrons
Prepared by Dr. S. Nakamura (JAEA)
International Atomic Energy Agency
Vietnamese Experiment in INDC(VN) Report
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
26
2004 INDC(VN)-11 Vuong Huu Tan et al.
Neutron Capture Cross Section Measurements of 109Ag, 186W and 158Gd on Filtered Neutron Beams of 55 and 144
keV
1997 INDC(VN)-10 Vuong Huu Tan
Progress Report on Research of Nuclear Data and Applied
Nuclear Physics at Nuclear Research Institute (Vietnam) for
the period January 1st - December 31st 1996
1996 INDC(VN)-09 Vuong Huu Tan Status Report of the Program on Neutron Beam Utilization
at the Dalat Nuclear Research Reactor
1996 INDC(VN)-08 Vuong Huu Tan et al. Measurement of Capture Cross Sections of 238U on the
Filtered KEV-Neutron Beams
1995 INDC(VN)-07 Vuong Huu Tan Study of Nuclear Data and Applied Nuclear Physics at the
Dalat Institute for Nuclear Research (Vietnam)
1987 INDC(VN)-06 Hien P.Z. and Lien H.N.
Preequilibrium Emission of Protons and Isotopic Effect in
the Fast Neutron-induced (n,p) Reactions on Heavy
Elements
1986 INDC(VN)-05 Hoang Dac Luc et al.
Determination of(n,p), (n,n'p) and (n,alfa) Reaction Cross
Sections Induced by 14.8 MeV on Cr Isotopes and Ti
Isotopes
1985 INDC(VN)-04 Hoang Dac Luc et al. Activation Cross Sections of(n,p) and (n,n'p) Reactions
Induced by 14.8 MeV on Cr Isotopes
1984 INDC(VN)-03 Hoang Dac Luc Progress Report on Nuclear Data Activities in Viet Nam
1983/84
1983 INDC(VN)-02 Phan Nhu Ngoc et al. Neutron activation cross section for 56Fe(n,p) and 87Rb(n,2n) reactions
1982 INDC(VN)-01 Fam-Zui-Chien et al. A Study of the Isomeric Ratio for the (n,2n) and (gamma,n)
Reactions in Mo92, Zr90, Sr86 and Se74
Dalat 3VN DAL
=? 3VN NNR
Hanoi
(3VN IPH)
International Atomic Energy Agency
Vietnamese Name Coding under EXFOR AUTHOR
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
27
Dear Dr. Otsuka Naohiko,
It is very nice to hear from you.
My full name is: NGUYEN VAN DO, (often write as: Nguyen Van Do). Here
NGUYEN: is my family name,
VAN: is my middle name, and
Do: is my given Name.
Yes, according the English rule, my name is abbreviated to: V. D. Nguyen, but
In my country we abbreviate as: N. V. DO.
We often call the given name. People call me Prof. Do, not Prof. Nguyen. (There are many
many Nguyen in Viet Nam), Therefore, in this case, my name in abbreviation as: N. V. Do
is preferable.
All Vietnamese names write by the same order (1) Family name, (2). Middle name and (3).
Given name, and this rule also valid for the following people:
Family name middle name given Name abbreviation
PHAM DUC KHUE P. D. Khue
KIM TIEN THANH K. T. Thanh
LE TRUONG SON L T. Son
TRAN HOAI NAM T. H. Nam
If you have some more questions, would you please le me know.
Best regards,
Nguyen Van Do
OTUKA Naohiko → N. Otuka NGUYEN Van Do → V.D.Nguyen (in English style) N.V.Do (in Vietnamese style)
International Atomic Energy Agency
Pakistan
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
28
Prof. Gul from PINSTECH (Pakistan Institute of Nuclear Science and Technology) 120 keV deuteron + T neutron source
International Atomic Energy Agency
New Pelletron in PINSTECH (5 MV)
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
29
K. Gul et al., Nucl. Instrum. Meth. B269(2011)2032
From: [email protected]
Sent: Wednesday, August 17, 2011 1:24 PM
To: OTSUKA, Naohiko
Subject: RE: K.Gul et al.,
Nucl.Instrum.Meth.B269(2011)2032 (EXFOR D0655)
Dear Dr. OTsuka,
…
It is mainly used for beam ion analysis by materials
scientists. It is also very difficult for me to look
for some problems for research related to nuclear
data. I would be obliged if you could educate me in
this direction.
…
International Atomic Energy Agency
3. Uncertainty Information in EXFOR
2012-08-27
N.Otsuka: Asian Collaboration in
Nuclear Reaction Data Measurements
and Compilation
30
International Atomic Energy Agency
Comedy of ‘Errors’
N.Otsuka: ISINN-20, Alushta, Ukraine
(2012-05-25) 31
Full slides are available at the CSWEG web page (NNDC)
http://www.nndc.bnl.gov/proceedings/2008csewgusndp/
One of William Shakespeare's (1564-1616) earliest plays. (<1594)
International Atomic Energy Agency
More ‘Error’ Information in EXFOR?
-----Original Message-----
From: [email protected] [mailto:[email protected]]
Sent: Tuesday, 15 July 2008 13:07
Dear Don,
....
We compile partial errors under these headings when authors give them (But
it is impossible to compile range of systematic error like "0.1% - 10%"),
and I always ask authors to specify type of error bars (statistical error or
statistical error + some systematic errors) for my compilation.
From: NICHOLS, Alan
Sent: Monday, August 04, 2008 3:30 PM
Naohiko
… I am not a big fan when it comes to using the word "error" in this (and
many other) situations involving nuclear databases. I was brought up to
think of any quantitative variations on a mean number as that number's
"uncertainty" (whether one sigma (preferred), two sigma, or whatever).
International Atomic Energy Agency
Error and Uncertainty
True value
Reported value
Error
Uncertainty (Standard deviation)
“DATA-ERR”, “ERR-S”… in EXFOR”
Reported value
True value (unknowable)
Error
BIPM et al., Guide to the expression of uncertainty in measurement (GUM:1995)
International Atomic Energy Agency
“Target Uncertainty” for Energy Application
Evaluated data must be provided with their uncertainty information variance (standard deviation) and covariance.
ADMAB: Accelerator driven minor actinide burner
Report from OECD NEA (WPEC SG36)
N.Otsuka: ISINN-20, Alushta, Ukraine
(2012-05-25) 34
International Atomic Energy Agency
Example of Evaluated Cross Section (JENDL-4.0 235U fission)
Uncertainty~ 0.5%!
International Atomic Energy Agency
Impact of Covariance (Correlation) on Evaluation
N.Otsuka: ISINN-20, Alushta, Ukraine
(2012-05-25) 36
W.P. Poenitz, INDC(USA)-85, p249 (1981)
(Uncorrelated source dominant)
(Correlated source dominant)
C = [ Δσcor(E1) ·Δσcor(E2) ] / [ Δσtot(E1)· Δσtot(E2) ] < 1
C~0: weakly correlated, C~1: strongly correlated
covariance
Exp-old
Exp-new
Eval.
Separation to uncorrelated (~statistical) and correlated (~systematic) uncertainties by experimentalists is essential for evaluation.
International Atomic Energy Agency
New EXFOR Formats for Covariance
SUBENT 23114002 20120710 2311400200001
BIB 3 43 2311400200002
REACTION (95-AM-241(N,2N)95-AM-240,,SIG) 2311400200003
ERR-ANALYS (ERR-T,,,P) Total uncertainty 2311400200004
(MONIT-ERR,,,P) 27Al(n,a) standard x-section (1.6-5.4%)2311400200005
(ERR-1,,,U) Counting of 240Am activity (1.4-6.3%)2311400200006
(ERR-2,,,U) Counting of 24Na activity (0.7-2.0%)2311400200007
(ERR-3,,,F) Intensity of 240Am gamma line (1.2%) 2311400200008
(ERR-4,,,U) Number of 27Al in sample (0.1%) 2311400200009
(ERR-5,,,P) Number of 241Am in sample (0.3%) 2311400200010
(ERR-6,,,F) 24Na/240Am efficiency ratio (3.0%) 2311400200011
(ERR-7,,,F) Correction for decay of 240Am (0.4-0.9%)2311400200012
(ERR-8,,,U) Correction for second. neutron (<1.4%) 2311400200013
COVARIANCE (XY,9,EN,MEV) incident neutron energy 2311400200014
8.34 9.15 13.33 16.1 17.16 17.9 19.36 19.95 20.61 2311400200015
(Z,45,COR:ERR-T,PER-CENT) macro-correlation 2311400200016
100 2311400200017
35 100 2311400200018
37 42 100 2311400200019
38 43 53 100 2311400200020
40 45 57 58 100 2311400200021
41 45 57 59 84 100 2311400200022
21 24 30 31 39 39 100 2311400200023
30 34 44 45 58 59 51 100 2311400200024
20 22 29 30 40 42 39 65 100 2311400200025
…
Correlation property U: Uncorrelated
F: Fully correlated etc.
Approved in the NRDC 2012 Meeting (Paris). Formats are ready, but we need real input!
International Atomic Energy Agency
“Small Guide” to Experimentalists
W. Mannhart (2011) – INDC(NDS)0588 (Reprint of PTB-FMRB-84)
Hard copies available on request.
Small (~50 page, single columns)
International Atomic Energy Agency
“Big Guide” to Experimentalists
Big (~50 page, double columns)
International Atomic Energy Agency
“Big Guide” to Experimentalists (Cont)
• INTRODUCTION
• Overview
• Role for nuclear data uncertainties
• BASIC CONCEPTS
• Probability distributions
• Covariance matrices and correlations
• Uncertainty propagation methods
• MODELS OF EXPERIMENTS
• Mathematical models
• Special situations
• Well-designed experiments
• SOURCES OF UNCERTAINTY
• Event counting uncertainties
• Detector-related uncertainties
• Geometric and material uncertainties
• Uncertainties from data corrections
• “Psychological” errors
• DOCUMENTING UNCERTAINTIES
• Publications
• Numerical data compilations
• An overview of EXFOR
• EXFOR covariance formats
• Sample from EXFOR
• SUMMARY Accepted in July for Nucl. Data Sheets. Will be published in Dec. 2012.
International Atomic Energy Agency
An Indian Young Researcher Preparing Real Input!
B.S. Shivashankar
58Ni(n,p)58Co at BARC TIFR Pelletron (to be submitted)
International Atomic Energy Agency
Another Article in the NDS Dec. Issue
Coordinated by P. Schillebeeckx (IRMM, Geel)
TOF data reduction
International Atomic Energy Agency
Another Article in the Dec. Issue (cont.)
International Atomic Energy Agency
Summary
• New Asian EXFOR entries :
~15% of entries from the world
• Regional Liaison (mini centre) in more countries(?):
Interface with IAEA-NDS + NRDC
• Experimental covariance:
Now EXFOR formats are ready.
Let us encourage people to give real input!