EXFOR 20674
last update: 2026-03-11
open / close all
0. OVERALL DESCRIPTION (20674.001)
last update: 2026-03-11
Title

Two-quantum radiative thermal neutron capture in 1H

Author
N.Wuest, H.Seyfarth, L.Aldea
Institute
Forschungszentrum Juelich, Juelich, Germany
Reference
Phys.Rev.C 19 (1979) 1153
Z.Phys.A 274 (1975) 349
Facility
Reactor of Forschungszentrum Juelich, Juelich

FRJ-2 (DIDO), 2E+08 neutrons/cm2/sec at the target position

Sample

1.5g distilled water in a thin lucite container placed inside a cylindrical shield of 6LiD (7 mm thick).

Method
Coincidence

gamma-gamma coincidence measurement with conventional fast-slow coincidence equipment

Detector
Germanium-Lithium detector

Ge(Li) detectors of 59 and 62cm3 used in the first measurement while those of 120 and 127 cm3 used in the third and fourth measurements.

Sodium-Iodide crystal

Two Nai(Tl) scintillators (10.2 cm * 10.2 cm, 7.6 cm * 7.6 cm) in the second measurement. .LEAD SHIELDING BETWEEN THE DETECTORS TO SURPRESS CROSSTALK.

Analysis

Weighted averages of the results from four measurements

Corrections

Corrected for

  • random coincidences
  • continuous background due to compton events
  • full energy peak efficiency and solid angle
Error analysis
Heading Lower limit (%) Upper limit (%) Correlation Remark
Single standard deviations
History
Date Work Remark
1976-11-09 Compiled at the data center
1977-05-04 Transmitted to other data centers
1980-08-08 Important alterations
Updated with main reference
1980-08-29 Transmitted to other data centers
1982-11-19 Important alterations
Subworks 3 and 4 superseded by data in subwork 2 and REACTION string in subwork 2 corrected.
1983-01-11 Transmitted to other data centers
2026-03-11 Important alterations
VT. Major revision in 002 and 004.
Constants 
------------
EN-DUMMY    
EV          
------------
 0.0253     
------------
1. DATA TABLE 20674.002
last update: 2026-03-11
Quantity given
1H(n,γ)2H partial cross section, Spectrum average, Approximate definition only, see REACTION text

Cross section for energies of two gammaes beween the outgoing energy range specified

Standard
1H(n,γ)2H cross section
Standard reference
A.F.Cox et al., Nucl.Phys. 74 (1965) 497 (EXFOR 21460.002)
Status
Data presented by authors (Ref. N.Wuest et al., Phys.Rev.C 19 (1979) 1153)

Table II

History
Date Work Remark
1980-08-08 Important alterations
1982-11-19 Important alterations
REACTION string corrected.
2026-03-11 Important alterations
VT. REACTION updated.
Constants 
------------------------
MONIT       MONIT-ERR   
MB          MB          
------------------------
 334.2       0.5        
------------------------
Data table 
------------------------------------------------
E-MIN       E-MAX       DATA        DATA-ERR    
KEV         KEV         MICRO-B     MICRO-B     
------------------------------------------------
 330.        1890.       -5.2        6.4        
 700.        1520.       -0.4        3.0        
------------------------------------------------
2. DATA TABLE 20674.003 (deleted)
last update: 1982-11-19
3. DATA TABLE 20674.004 (deleted)
last update: 1982-11-19
4. DATA TABLE 20674.005
last update: 2026-03-11
Quantity given
16O(n,γ)17O partial cross section, Spectrum average, Approximate definition only, see REACTION text

Cross section for gamma cascade for Egamma=1088 keV - 2184 keV - 871 keV

Status
Data presented by authors (Ref. N.Wuest et al., Phys.Rev.C 19 (1979) 1153)

Table II

History
Date Work Remark
1980-08-08 Compiled at the data center
2026-03-11 Important alterations
VT. REACTION updated.
Data table 
------------------------------------
E           DATA        DATA-ERR    
KEV         MICRO-B     MICRO-B     
------------------------------------
 1959.       153.        6.         
------------------------------------
5. DATA TABLE 20674.006
last update: 2026-03-11
Quantity given
16O(n,γ)17O cross section, Spectrum average
Analysis

Cross section for gamma cascade for Egamma=1088 keV - 2184 keV - 871 keV divided by 0.82

Related reference
A.B.McDonald et al., Nucl.Phys.A 281 (1977) 325

[Reference from which data were used]

Branghing ratio 82+/-3% for 1088 keV + 871 keV coincidence event for thermal neutron capture

Status
Data presented by authors (Ref. N.Wuest et al., Phys.Rev.C 19 (1979) 1153)

Abstract

Dependent data (See EXFOR 20674.005)

Cross section for gamma cascade

History
Date Work Remark
1980-08-08 Compiled at the data center
2026-03-11 Important alterations
VT. REACTION updated.
Data table 
------------------------
DATA        DATA-ERR    
MICRO-B     MICRO-B     
------------------------
 187.        10.        
------------------------