progress on nuclear data measurements in china · progress on nuclear data measurements in china...
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Progress on Nuclear data
Measurements in China
Xichao Ruan
WPEC-2018, May 14-18, 2018, Paris, France
China Nuclear Data Center
China Institute of Atomic Energy
Progress of ND measurements in the following
institutes are collected
China Institute of Atomic Energy Xichao Ruan
Highlights in 2017 1. (n,2n) measurement with HeSAN 2. Nuclear data benchmark experiments 3. Progress of CSNS Back-n
1. (n,2n) measurement with HeSAN
HeSAN (氦-3): He-3 SphericAl Neutron Detector Array
110 He-3 counters uniformly distributed in a spherical PE
moderator
• Insensitive to gamma rays
• Detection efficiency
acceptable (~33% for 252Cf
source)
• Spherical design makes the
efficiency more
independent on energy
5
shielding Accelerato
r roo
m d-T source
d beam
Experimental setup：
Neutron beam
HeSAN Beam dump
collimator
6
First measurement on 93Nb(n,2n) shows HeSAN work well
2. Nuclear data benchmark experiment
头部
32.6°
屏蔽网
倍加器大厅
配电
室
实验大厅
偏转磁铁
11000
6860
8400
55004500
6500
墙厚250
11400
11200
6250
2500
2400
800*8004140
2000 样品探测器
Measure the neutron leakage spectrum from slab samples for different angles with a 14 MeV d-T neutron source
D-T neutron
source
Slab
sample
neutron
detector
The collimator system
D-T neutron
source
Slab
sample
neutron
detector
238U+C combined slab sample
5cm U+10cm C样品结果
Iron samples with different size
不同厚度铁样品60°，120°泄漏中子飞行时间谱实验结果和模拟结果比较
1. The beam line construction finished in July, 2017 2. First proton beam on target in Aug., 2017. 3. Commissioning experiments:
1) beam test (flux, beam profile, backgrounds) finished in Mar. 2018. 2) capture cross section measurement with C6D6 detector (Tm-169) finished in April, 2018. 3) fission cross section measurement with a parallal ionization chamber (U-236) finished in May, 2018. 4) 6li(n, ) reaction cross section measurement underway.
3. Progress of CSNS Back-n
Beam line for ND
measurement
The back-streaming neutron beam of CSNS
Hall 1
(n,lcp)
Hall 2
(n,f) and (n,)
Layout of the back streaming neutron beamline
Spallation target Proton beam
Neutron beam
The CSNS Back-n
15
Neutron beam characteristics
Energy range: eV to 100 MeV Flux: ~8105/cm2/s (10 kW, 60 beam spot) Beam spot: 30，60，9090 mm
16
First experiment on 169Tm(n,g) reaction finished in April,2018
Au
Tm
56,54Fe(n, α)53,51Cr Cross Sections in the MeV Region
• (n,) reaction cross section measurement in the 5.0-11.0 MeV region
for 54Fe and 56Fe
4 8 12 16 200
10
20
30
40
50
60
56Fe(n, )53Cr
(a)
ENDF/B-VII.1
JEFF-3.3
JENDL-4.0
BROND-3.1
ROSFOND-2010
CENDL-3.1
JEFF-3.1/A
JEF-2.2
JENDL-4.0/HE
JENDL/HE-2007
FENDL-3.1c
EAF-2010
TENDL-2015
Talys-1.8
Talys-adjust
Corrected Grimes (1979)
Corrected Paulsen (1981)
Corrected Baba (1994)
Corrected Sterbenz (1994)
Saraf (1991)
Wang (2015)
Present
Cro
ss s
ecti
on
(m
b)
En (MeV)4 8 12 16 20
0
20
40
60
80
100
120 Fan （1985） Bahal (1985)
Greenwood (1987)
Meadows (1987)
Ikeda (1988)
Lu (1989)
Ercan (1991)
Meadows (1991)
Saraf (1991)
Meadows (1991)
Grallert (1993)
Meadows (1993)
Meadows (1996)
Gledenov (1997)
Mannhart (2007)
Wang (2015)
Present
ENDF/B-VII.1
JEFF-3.3
JENDL-4.0
BROND-3.1
ROSFOND-2010
CENDL-3.1
JEFF-3.1/A
IRDFF-1.05
IRDF-2002
IRDF-2002G
JENDL-4.0/HE
JENDL/HE-2007
FENDL-3.1c
EAF-2010
TENDL-2015
Talys-1.8
Talys-adjust
Pollehn (1961)
Chittenden (1961)
Cross (1963)
Salisbury (1965)
Rao (1967)
Singh (1972)
Maslov (1974)
Molla (1977)
Fukuda (1978)
Paulsen (1979)
Artemev （1980）
Cro
ss s
ecti
on (
mb)
En (MeV)
(b)
54Fe(n, )51Cr
A shoulder was observed around
10 MeV, the reason is unknown
2018-5-15
ADS related nuclear data
measurements at IMP,CAS
(2017)
Dr. Zhiqiang Chen
ADS Nuclear Data Laboratory
Institute of Modern Physics,
Chinese Academy of sciences (IMP,CAS)
Nuclear data benchmark experimental setup at CIAE
sample dimension Angle
Polyethylene 10cm*10cm*5cm 60°
Gallium 10cm*10cm*5cm, 10cm*10cm*10cm,
Ø13cm*3.2cm, Ø13cm*6.4cm
60°,120°
Tungsten(block) 10cm×10cm×3.6cm, 10cm×10cm×7.2cm 60°,120°
Tungsten(Granular) 9.8*9.9*7.2cm ,（granular diameter:1mm） 60°
Graphite Φ13*2cm, Φ13*20cm 60°,120°
SiC Φ13*2cm, Φ13*20cm 60°,120°
238U 10cm*10cm*2cm, 60°
238U 10cm*10cm*5cm, 10cm*10cm*11cm 60°,120°
W+U W:10cm*10cm*3.5cm , U: 10cm*10cm*2cm 60°
W+U+C W:10cm*10cm*3.5cm, U: 10cm*10cm*2cm
C: 10cm*10cm*2cm
60°
W+U+C+CH2 W:10cm*10cm*3.5cm , U: 10cm*10cm*2cm
C: 10cm*10cm*2cm, CH2: 10cm*10cm*2cm
60°
U+C U: 10cm*10cm*5cm , C: 10cm*10cm*10cm 60°
U+C+CH2 U: 10cm*10cm*5cm , C: 10cm*10cm*10cm
CH2: 10cm*10cm*10 cm
60°
Benchmark experiments with 14MeV neutron
(collaborated with CIAE)
14MeV n + 238U
10cm*10cm*2cm@60° 10cm*10cm*5cm@60° 10cm*10cm*11cm@60°
10cm*10cm*5cm@120° 10cm*10cm*11cm@120° Evaluated neutron cross sections for 238U
14MeV n + W-U-C-CH2 3.5cm W+ 2cm U@60° 2cm U@60°
3.5cm W+2cm U+ 2cm C + 2cm CH2@60° 3.5cm W+ 2cm U+2cm C @60°
14MeV n + U-C-CH2 5cm U + 10cm C @60° 5cm U @60°
5cm U+ 10cm C+10cm CH2 @60°
15 MeV LINAC driven neutron source
Neutron yield at full power 1011s-1
Energy resolution for thermal neutron <1%
Neutron flux 104 s-1cm-2
Neutron Flight length 6 m
Electron energy 15 MeV
Electron average current 0.1 mA
Electron power of the linac 1500 W
Electron pulse width 3-3000 ns
Total neutron cross
section;
Thermal neutron
scattering;
Activation measurement;
Reactor material boron
equivalent determination;
Neutron spectrum & time-energy calibration
2
0
72.3 [ ][ ]
[ ]
L mE eV
t t s
Preliminary measurement of total Cross
section for Graphite/Be/Th
2018-5-15
Shanghai Institute of Applied Physics
Dr. Hongwei Wang
Shanghai Laser Electron Gamma Source-SLEGS
2008 - 2025
二、线站整体布局 Photonuclear Data Measurement@SSRF/SLEGS
Light Source End station Frant-End
Technical design - Layout
Beamline
(1) Light source: electron, laser, LCS chamber(slanting mode), mirror chamber(back scattering).
(2) Front end: Include Mirror chamber.
(3) Beamline:Collimators, attenuator, energy detector, position detector, flux detector and absorber.
(4) End station: (,n） Neutron detector， (,p/ɑ） Charged particle detector， (,） Gamma detector
As a beamline of SSRF, SLEGS has been formally incorporated into the phase II project of
SSRF. Design of SLEGS has been carried out in 2016 and will be open for users from 2022.
Shanghai Laser Electron Gamma Source
SLEGS Scientific goals:
Photo-nuclear physics:
Nuclear Astrophysics：nuclear reactions which have a critical impact on stellar
evolution and nucleosynthesis of elements
Nuclear structure GDR and NRF, etc.
Research on the anti- radiation properties of aerospace device and
calibration for the X/ detector equiped on aerospace device
Nuclear waste transmutation research and nuclear safety,
Gamma-ray imaging techniques (in particular: isotope imaging technology), etc.
Properties
Energy range： 0.4-20 MeV
Energy resolution ： ~5%
Divergence angle： 0.5mrad(milli-radian)
Flux： (0.2-4.2)×107 phs/s
Thank you for your attention !