http://www.jcprg.org/

Nuclear data research activity and aperspective of JCPRG and NRDC
Sept. 21, 2007
JPS meeting 2007 Autumn (Hokkaido Univ.)
Symposium: Nuclear Reaction Data for Astrophysics

Naohiko Otuka
Nuclear Data Center, Japan Atomic Energy Agency(JAEA)
Nuclear Reaction Data Centre, Hokkaido University(JCPRG)
ohtsuka@nucl.sci.hokudai.ac.jp
http://www.jcprg.org/

Contents①

Nuclear data②

Activity of JCPRG and NRDC③

Data file and astrophysics④Conclusion

1.Nuclear dataNuclear Data describe properties of atomic nuclei

and the fundamental physicalrelationships governing theirinteractions
 characterize physical processes
underlying all nuclear technologies(O. Schwerer, IAEA-NDS 2000)

Network in astrophysics(n, γ)(α, γ)(α, n)

Schematic diagram of nuclear process in stars - E. M. Burbidge et al., (B2FH) Rev.Mod.Phys.29(1957)

Network in reactor physics(n, γ)(n, f)(n, 2n)Burning chain in fast reactor JOYO - Sugino (2007), private communication

Nuclear Data → Network Calc.
dN i (t )= −(λi + σ iφ ) N i (t ) + ∑ f j →i λ j N j (t ) + ∑ g k →iσ kφN k (t )dtjk

Network calculation
ENSDF(Table of Isotopes)

ENDF,JENDL, JEFF
NACRE, KADoNiS, …

Evaluated reaction data

Evaluated structure data

Mass evaluation
Experimental reaction data

AMDC (Audi et al.) Experimental structure data

EXFOR, NRDF, …

Experiment2. Activity of JCPRG and NRDCJCPRG?
Japan Charged-Particle Nuclear Reaction Data Group (JCPRG)
日本荷電粒子核反応データグループ(1974.4~ founded by H. Tanaka)

Hokkaido University Nuclear Reaction Data Center (JCPRG?)
北海道大学大学院理学研究院附属原子核反応データ研究開発センター(2007.4~, Head: K. Kato)• R&D contraction for nuclear data with RIKEN Nishina Center• Collaborative nuclear data education with JAEA Nuclear Data CenterPoster of JCPRGbarn

Objective of JCPRG
 Compilation of charged-particle nuclear data(CPND) and photo-nuclear reaction data (PhND)
in NRDF format

 International exchange of data files in EXFOR

format (coordinated by IAEA)JCPRG is responsible to Japanese CPND andPhND compilation.
(Japanese neutron data →NEA-DB at Paris)

 Academic oriented (not atomic energy oriented)

Compilation of Japanese Data
Bibliographyexperimental condition(~1 week)

Compiler
Numerical data from
Experimenters- Checking- Author proof

Digitization if data is not available(old data, silent authors…)

Release(~6 months)

International Data Exchange
EXFOR:
EXchange FORmat for nuclear reaction data
NEA-DB

NNDC

EXFOR
RussiaChina
Hungary
Ukraine
…

JCPRG
IAEA

JCPRG

Nuclear Reaction Data Center
Network (NRDC)
NNDC
NEA-DB
IAEA-NDSCJD CAJaD CDFE CNPDATOMKI
CNDC
JCPRG JAEA-NDC
KAERI –NDEL
UkrNDCBARC

Coordinated by IAEA-NDS(Nuclear Data Section)

All centres are responsible to compilation of data from their area
and/or incident particles (JAEA and KAERI do only evaluation.)

Compiler Workshop (IAEA, 2001)
About 10 data compilers in the world

guest from IAA-ULBCompilation Statistics(EXFOR, 2003-2006)
Neutron induced
reaction data (1050 works)

USUSJapan

EU +Japan

Photo-nuclear data(138 works)

Charged-particle
induced reaction data
(3000 works,of which 10% is from JCPRG)

On/Off-line access to database

JCPRG

IAEA-NDS

80,000~90,000 searches / year
CD and Book are also available.
(CINDA: A Bibliographical database for nuclear reaction works)

NNDCNEA-DB3. Data base and astrophysics

Astro-nuclear data in JENDL-3.3(JAEA-NDC)

12C(n,γ)13C

JENDL-3.3(2002)

Exp: Y. Nagai+ (1991), T. Shima+ (1996)
ENDF-B/VI.8
30 keVJENDL-3.3 → MACS at 30 keV(JAEA-NDC)
MACS: Maxwellian - Averaged Cross Section <σv>/vT

JENDL-3.3 MACS

nuclides(n, γ)

336(n, f)

61(n, p)

40(n, α)

32

JENDL-3.3 MACS

- T. Nakagawa et al.（２００５）, At. Data Nucl. Data Tables 91(2005)77

Example of deviation in <σv>/vT
74Se<σ>30 (mb)Ratio to JENDL-3.3

Bao et al. (2000)

267 (25)

1.28

NON-SMOKER (2001)

207

1.00

MOST (2005)

304

1.46

JENDL-3.3 (2002)

208

1Dillmann et al. (2006)

271 (15)

1.30

Minor actinide yields (reactor)

Experimental
Value

Burning chain in experimental reactor JOYO- Sugino (2007), private communication

Can astrophysics provide benchmark for nuclear data?

Compilation of Astrophysical Data(JCPRG)
NRDF/A : Compilation for astrophysical data of
31 reactions - (n,γ), (α,γ), (α,n)

13C(α,n)16O

0(n,γ)reaction(α,γ)

26Mγ(α, γ)30Si

25Mγ(α, γ)29Si

24Mγ(α, γ)28Si

22Ne(α, γ)26Mγ

21Ne(α, γ)25Mγ

20Ne(α, γ)24Mγ

18O(α, γ)22Ne

17O(α, γ)21Ne

16O(α, γ)20Ne

13C(α. γ)17O

12C(α, γ)16O

20

26Mγ(n, γ)27Mγ

25

25Mγ(n, γ)26Mγ

24Mγ(n, γ)25Mγ

24N α(n, γ)25N α

23N α(n, γ)24N α

22Ne(n, γ)23Ne

21Ne(n, γ)22Ne

20Ne(n, γ)24Mγ

18O(n, γ)19O

17O(n, γ)18O

16O(n, γ)17O

13C(n, γ)14C

12C(n, γ)13C

number of data points

Data point number in NRDF/A30

Data points are not enoughfor evaluation.

15

105

5.Conclusion

Conclusions


Nuclear reaction data base:
Basic infrastructure in physics and engineering

JCPRG: Accumulate all experimental data points in database(We do not know which reaction data will be useful in future)Financial and human resource for compilation are unstable.
(Nuclear data services are free of charge.)

Citation and acknowledgement to the database are appreciated.

Scope is very wide:Collab. between experimenters-compilers-evaluators-usersThank you for all experimentalists who provide us numerical data!!

Members of JCPRG and NRDC
Hokkaido University Nuclear Reaction Data Centre (JCPRG)
NRDF Advisory Committee：

Y. Abe (RCNP), Y. Akaishi (RIKEN), Y. Aoki (Tsukuba), M. Baba (Sendai), J. Chiba (TUS), A. Hasegawa (NEA(NEA-DB),
K. Hatanaka (RCNP)), M. Ishihara （RIKEN）
RIKEN）, K. Kato (Sapporo), J. Katakura (JAEA), M. Kawai (Fukuoka), S. Kubono (CNS),
S. Morinobu (RCNP), T. Noro (Fukuoka), T. Motobayashi (RIKEN), T. Nagae (Kyoto), K. Okamoto（Okamoto（JAIF）
JAIF）, H. Ohnuma（Ohnuma（TIT）
TIT）,
H. Orihara (Sendai), T. Saito (Sendai), H. Sakurai (RIKEN), H. Tanaka (Sapporo), H. Utsunomiya
Utsunomiya (Konan)
NRDF Steering Committee：
Committee：
K. Kato (Hokkaodo U.), S. Aoyama (Niigata U.）U.）, M. Chiba （Sapporo Gakuin U.）U.）, Y. Hirabayashi (Hokkaodo U.), T. Katayama(Hokusei Gakuen U.), H. Masui (Kitami Inst. Tech.）
Tech.）, H. Noto（Noto（Hokusei Gakuen U.）U.）, A. Ohnishi（Ohnishi（Hokkaido U.）U.）,S. Okabe(Hokkaido U.)

Compilation, Digitization, System development:
T. Ashizawa (Hokkaido U.）U.）, H. Matsumiya (Hokkaido U.), T. Murakami (Hokkaido U.),R. Suzuki (Hokkaido U.) T. Togashi (Hokkaido U.), K. Tsubakihara (Hokkaido U.),H. Yoshida (Hokkaido U.)
Nuclear Reaction Data Centers Network (NRDC)
Compilers:O. Schwerer (IAEA(IAEA-NDS), S. Dunaeva (IAEA(IAEA-NDS), D. Rochman (BNL(BNL-NNDC), S.Y. Babykina (Moscow), S. Maev (Obninsk),
Obninsk),
M. Mikhaylyukova (Obninsk),
Obninsk), N.Otuka (JAEA/JCPRG), S. Takacs (ATOMKI), H. Henriksson (OECD(OECD-NEA), N.Klimova(Kiev)

More information?
Experimental nuclear data base (NRDF, EXFOR)：
http://www.jcprg.org/ (JCPRG)



Evaluated nuclear data base (JENDL)：
http://wwwndc.tokai-sc.jaea.go.jp/ (JAEA-NDC)

JCPRG – Monthly meeting