ENTRY 32771 20210226 32003277100000001
SUBENT 32771001 20210226 32003277100100001
BIB 12 69 3277100100002
TITLE Cross section measurement for the 10B(n,t2a) three- 3277100100003
body reaction at 4.0, 4.5, and 5.0 MeV. II. 3277100100004
Experimental setup and results 3277100100005
AUTHOR (Zhimin Wang, Huaiyong Bai, Luyu Zhang, Haoyu Jiang, 3277100100006
Yi Lu, Jinxiang Chen, Guohui Zhang, Yu.M.Gledenov, 3277100100007
M.V.Sedysheva, G.Khuukhenkhuu) 3277100100008
INSTITUTE (3CPRBJG,4ZZZDUB,3MGLNUM) 3277100100009
(3CPRCPR) Ocean University of China, Qingdao 3277100100010
REFERENCE (J,PR/C,96,044621,2017) 3277100100011
#doi:10.1103/PhysRevC.96.044621 3277100100012
(J,PR/C,96,044620,2017) 3277100100013
#doi:10.1103/PhysRevC.96.044620 3277100100014
For prediction of the experimental spectrum 3277100100015
(T,WANG,201704) 3277100100016
PhD thesis submitted to Peking university 3277100100017
(J,EPJ/A,55,219,2019) 3277100100018
#doi:10.1140/epja/i2019-12908-x 3277100100019
The new results of re-analysing for same experiment 3277100100020
FACILITY (VDG,3CPRBJG) 4.5 MV Van de Graaff accelerator. 3277100100021
INC-SOURCE (D-D) The deuteron beam current was about from 2.5 to 3277100100022
3.5 uA. The length and pressure of the deuterium gas 3277100100023
target were 2.0 cm and 0.30 MPa. For neutrons with 3277100100024
energy of 4.0, 4.5 and 5.0 MeV, the energies were 3277100100025
0.21, 0.19 and 0.16 MeV, respectively. 3277100100026
DETECTOR (IOCH) A twin gridded ionization chamber (GIC) was 3277100100027
used as the charged particle detector with forward 3277100100028
and backward asymmetrical sections. 3277100100029
(BF3) The BF3 counter was used as the neutron flux 3277100100030
monitor. 3277100100031
SAMPLE (5-B-10,ENR=0.940) The 10B sample consists of four 3277100100032
components: the 10B deposit, the aluminum-film 3277100100033
backing as the substrate of 10B deposit, the tantalum 3277100100034
frame bearing the aluminum backing, and the aluminum 3277100100035
washer to fix and flatten the tantalum frame. In 3277100100036
addition to the 10B sample, a thin-film background 3277100100037
sample was also prepared without the 10B deposits on 3277100100038
the aluminum backing which was used for the 3277100100039
background measurement. 3277100100040
(3-LI-6,ENR=0.90) The reference 6LiF sample was also 3277100100041
prepared and the lithium fluoride was evaporated onto 3277100100042
a tantalum-foil backing (48.0 mm x 0.1 mm) without 3277100100043
holes. 3277100100044
The number of 10B atoms was determined by the relative 3277100100045
comparison method using the thermal neutron induced 3277100100046
10B(nth,a)7Li and 6Li(nth,t)4He reactions with a 6LiF 3277100100047
sample as the reference. 3277100100048
(92-U-238,ENR=0.99997) The mass and the diameter of 3277100100049
the 238U sample were 493.6 ug/cm2 and 4.50 cm. 3277100100050
ANALYSIS Cross sections of the 10B(n,t2a) and 10B(n,a)7Li 3277100100051
reactions were calculated using the event counts from 3277100100052
the spectrum unfolding method and the residual 3277100100053
method. The residual method was taken as the final 3277100100054
results since the event counts obtained by the 3277100100055
residual method are more accurate. The event counts 3277100100056
from the (n,t2a) and (n,a) can be separated on the a 3277100100057
energy spectrum. 3277100100058
MONITOR (92-U-238(N,F),,SIG) 3277100100059
Neutron Standard Reference (2015) www-nds.iaea.org 3277100100060
COMMENT The experiment was performed in 2017, the anode and 3277100100061
grid signals of the GIC are used, the uncertainties 3277100100062
of the measurement results were big especially for 3277100100063
the 10B(n,t2a) three-body reaction. To obtain better 3277100100064
results, the experimental data are re-analysed using 3277100100065
the anode and cathode signals of the GIC. 3277100100066
HISTORY (20181121C) Compiled by Jing QIAN (CNDC) 3277100100067
(20210226A) Jimin Wang: J,EPJ/A,55,219,2019 added in 3277100100068
REFERENCE. INC-SOURCE was updated and COMMENT was 3277100100069
added. ERR-ANALYS and STATUS were moved to 002 and 3277100100070
003. New SUBENT 004 and 005 were input. 3277100100071
ENDBIB 69 0 3277100100072
NOCOMMON 0 0 3277100100073
ENDSUBENT 72 0 3277100199999
SUBENT 32771002 20210226 32003277100200001
BIB 4 15 3277100200002
REACTION (5-B-10(N,T+A)2-HE-4,,SIG) 3277100200003
PART-DET (A) 3277100200004
ERR-ANALYS (ERR-T) The relative uncertainties of the cross 3277100200005
section measured from the uncertainty of fission 3277100200006
cross section, the uncertainties of the numbers of 3277100200007
238U and 10B atoms, the uncertainty of the fission 3277100200008
counts and the uncertainty of the event counts for 3277100200009
the 10B(n,t2a) or 10B(n,a)7Li reactions. 3277100200010
(ERR-1) 238U fission counts 3277100200011
(ERR-2) Number of atoms in the 10B samples 3277100200012
(ERR-3) Number of atoms in the 238U samples 3277100200013
(MONIT-ERR) 238U fission cross section 3277100200014
STATUS (TABLE) Data taken from Table VI of 3277100200015
Phys.ReV.C,96,044621,2017 3277100200016
(SPSDD,32771004) 3277100200017
ENDBIB 15 0 3277100200018
COMMON 4 3 3277100200019
ERR-1 ERR-2 ERR-3 MONIT-ERR 3277100200020
PER-CENT PER-CENT PER-CENT PER-CENT 3277100200021
3.1 3.5 1.3 0.8 3277100200022
ENDCOMMON 3 0 3277100200023
DATA 3 3 3277100200024
EN DATA ERR-T 3277100200025
MEV MB PER-CENT 3277100200026
4.0 155. 19. 3277100200027
4.5 194. 15. 3277100200028
5.0 185. 23. 3277100200029
ENDDATA 5 0 3277100200030
ENDSUBENT 29 0 3277100299999
SUBENT 32771003 20210226 32003277100300001
BIB 3 14 3277100300002
REACTION (5-B-10(N,A)3-LI-7,,SIG) 3277100300003
ERR-ANALYS (ERR-T) The relative uncertainties of the cross 3277100300004
section measured from the uncertainty of fission 3277100300005
cross section, the uncertainties of the numbers of 3277100300006
238U and 10B atoms, the uncertainty of the fission 3277100300007
counts and the uncertainty of the event counts for 3277100300008
the 10B(n,t2a) or 10B(n,a)7Li reactions. 3277100300009
(ERR-1) 238U fission counts 3277100300010
(ERR-2) Number of atoms in the 10B samples 3277100300011
(ERR-3) Number of atoms in the 238U samples 3277100300012
(MONIT-ERR) 238U fission cross section 3277100300013
STATUS (TABLE) Data taken from Table VI of 3277100300014
Phys.ReV.C,96,044621,2017 3277100300015
(SPSDD,32771005) 3277100300016
ENDBIB 14 0 3277100300017
COMMON 4 3 3277100300018
ERR-1 ERR-2 ERR-3 MONIT-ERR 3277100300019
PER-CENT PER-CENT PER-CENT PER-CENT 3277100300020
3.1 3.5 1.3 0.8 3277100300021
ENDCOMMON 3 0 3277100300022
DATA 3 3 3277100300023
EN DATA ERR-T 3277100300024
MEV MB PER-CENT 3277100300025
4.0 277. 7. 3277100300026
4.5 211. 7. 3277100300027
5.0 144. 7. 3277100300028
ENDDATA 5 0 3277100300029
ENDSUBENT 28 0 3277100399999
SUBENT 32771004 20210226 32003277100400001
BIB 5 12 3277100400002
REACTION (5-B-10(N,T+A)2-HE-4,,SIG) 3277100400003
PART-DET (A) 3277100400004
ERR-ANALYS (ERR-T) The total uncertainty of the cross section of 3277100400005
the 10B(n,t2a) three-body reaction is (6.1-9.3)%. 3277100400006
(ERR-S) Total counts of the 10B(n,t2a) events 3277100400007
(ERR-1) 238U fission counts 3277100400008
(ERR-2) Number of atoms in the 10B samples 3277100400009
(ERR-3) Number of atoms in the 238U samples 3277100400010
(ERR-4) Ratio of the counts of the BF3 long counter 3277100400011
(MONIT-ERR) 238U fission cross section 3277100400012
STATUS (TABLE) Table 3 of Eur. Phys. J. A 55(2019)219 3277100400013
HISTORY (20210226C) Compiled by Jimin Wang (CNDC) 3277100400014
ENDBIB 12 0 3277100400015
COMMON 5 3 3277100400016
ERR-1 ERR-2 ERR-3 ERR-4 MONIT-ERR 3277100400017
PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3277100400018
1.0 3.5 0.5 1.0 0.7 3277100400019
ENDCOMMON 3 0 3277100400020
DATA 4 3 3277100400021
EN DATA ERR-T ERR-S 3277100400022
MEV MB MB PER-CENT 3277100400023
4.0 164.1 10.2 4.9 3277100400024
4.5 197.6 12.0 4.7 3277100400025
5.0 199.2 18.5 8.4 3277100400026
ENDDATA 5 0 3277100400027
ENDSUBENT 26 0 3277100499999
SUBENT 32771005 20210226 32003277100500001
BIB 4 11 3277100500002
REACTION (5-B-10(N,A)3-LI-7,,SIG) 3277100500003
ERR-ANALYS (ERR-T) The total uncertainty of the cross section of 3277100500004
the 10B(n,a)7Li two-body reaction is (4.1-4.2)%. 3277100500005
(ERR-S) Total counts of the 10B(n,a)7Li events 3277100500006
(ERR-1) 238U fission counts 3277100500007
(ERR-2) Number of atoms in the 10B samples 3277100500008
(ERR-3) Number of atoms in the 238U samples 3277100500009
(ERR-4) Ratio of the counts of the BF3 long counter 3277100500010
(MONIT-ERR) 238U fission cross section 3277100500011
STATUS (TABLE) Table 3 of Eur. Phys. J. A 55(2019)219 3277100500012
HISTORY (20210226C) Compiled by Jimin Wang (CNDC) 3277100500013
ENDBIB 11 0 3277100500014
COMMON 5 3 3277100500015
ERR-1 ERR-2 ERR-3 ERR-4 MONIT-ERR 3277100500016
PER-CENT PER-CENT PER-CENT PER-CENT PER-CENT 3277100500017
1.0 3.5 0.5 1.0 0.7 3277100500018
ENDCOMMON 3 0 3277100500019
DATA 4 3 3277100500020
EN DATA ERR-T ERR-S 3277100500021
MEV MB MB PER-CENT 3277100500022
4.0 275.6 11.2 1.3 3277100500023
4.5 227.6 9.5 1.6 3277100500024
5.0 176.0 7.5 1.8 3277100500025
ENDDATA 5 0 3277100500026
ENDSUBENT 25 0 3277100599999
ENDENTRY 5 0 3277199999999