Multifoil activation at LENA channel-B

imgd4c9245b9db55f54e34354ace7d6e159.png
LENA channel B configuration. Several positions are indicated [author: S Altieri, LENA, Uni Pavia, February 2021]

where

Reference
A new convention for the epithermal neutron spectrum for improving accuracy of resonance integrals
H Harada, N Takayama and M Komeda
Journal of Physics Communications, Volume 4, Number 8

img122c74737641d41e2c43a3d75236af43.png
Comparison of n_TOF NEAR Station (configuration M81) and LENA neutron spectra
img00d38e0bce224a5be403cbd5c357a63a.png
Comparison of n_TOF NEAR Station (configuration M81) and LENA neutron spectra

Position 3

Configuration L03
neutron flux (scoring pos. 27) 1.21e+07 n/cm2/ppulse
ppulse cycle 1.0 s
filter type and thickness Cd, 0.05 cm
f-neutron flux 4.37e+05 n/cm2/ppulse
irradiation time 0.25 d
cooling time 1 h
counting time 1 d
Iγ 100%
detection efficiency ε 1
sample diameter 1.0 cm
sample thickness 0.1 cm ← used for self-shielding
total number of protons/day 6.05e+17
total number of neutrons/cm2/day 1.05e+12

isotope nat_abund [%] reaction xsection product half-life Eγ [keV] σγ [b] u-SACS [b]† Σ [1/cm] SACS [b] f-SACS [b] priority sat.act. [Bq/g] activity(eoi)‡ [Bq/g] activity [Bq/g] f-activity [Bq/g] counts/g f-counts/g note
Cd-114 28.73 (n,g) data plot Cd-115 2.23 d 527 3.05e-01 2.86e-01 132.438 6.90e-01 6.69e-01 AAA 4.22e+02 3.16e+01 3.12e+01 2.94e+01 2.31e+06 2.18e+06  
Sc-45 100 (n,g) data plot Sc-46 83.79 d 1120 2.72e+01 2.30e+01 1.809 2.21e+01 2.21e+00 AAA 2.82e+06 5.82e+03 5.82e+03 2.54e+01 5.00e+08 2.19e+06  
Lu-176 2.59 (n,g) data plot Lu-177 6.64 d 208 2.10e+03 3.10e+03 3.657 2.73e+03 1.81e+02 AAA 1.80e+06 4.64e+04 4.62e+04 1.52e+02 3.79e+09 1.25e+07  
Ir-191 37.3 (n,g) data plot Ir-192 73.83 d 316 9.54e+02 8.18e+02 27.368 3.83e+02 2.16e+01 AAA 3.55e+05 8.33e+02 8.33e+02 1.57e+01 7.16e+07 1.35e+06  
Au-197 100 (n,g) data plot Au-198 2.69 d 411 9.87e+01 8.92e+01 5.848 7.26e+01 1.23e+01 AAA 1.29e+06 8.05e+04 7.96e+04 8.03e+02 6.06e+09 6.12e+07  
W-186 28.6 (n,g) data plot W-187 1.00 d 685 3.79e+01 3.35e+01 1.578 3.13e+01 5.30e+00 AAA 2.96e+05 4.70e+04 4.57e+04 2.72e+02 2.85e+09 1.69e+07  
In-113 4.3 (n,g) data plot In-114(m1) 49.51 d 190 1.21e+01 1.14e+01 7.011 9.79e+00 1.47e+01 AA 1.14e+04 3.98e+01 3.98e+01 4.26e+00 3.41e+06 3.65e+05  
Fe-58 0.28 (n,g) data plot Fe-59 44.49 d 1099 1.31e+00 1.12e+00 1.145 1.11e+00 1.53e-01 AA 3.39e+02 1.32e+00 1.32e+00 7.12e-03 1.13e+05 6.10e+02  
Ag-109 48.161 (n,g) data plot Ag-110 24.56 d 658 9.03e+01 8.12e+01 3.661 6.97e+01 1.52e+01 A 1.40e+06 9.85e+03 9.83e+03 1.07e+02 8.38e+08 9.07e+06  
 
Ni-58 68.077 (n,p) data plot Co-58 70.86 d 810 - 7.13e-04 1.943 9.09e-04 2.22e-02 AAA 6.00e+01 1.47e-01 1.47e-01 1.45e-01 1.26e+04 1.25e+04  
Al-27 100 (n,a) data plot Na-24 15.00 d 1368 - 7.79e-05 0.100 7.78e-05 2.09e-03 AAA 2.13e+01 2.45e-01 2.45e-01 2.42e-01 2.07e+04 2.04e+04  
Au-197 100 (n,2n) data plot Au-196 6.17 d 355 - 1.41e-03 5.848 2.88e-03 4.79e-02 AAA 5.12e+01 1.42e+00 1.41e+00 1.40e+00 1.15e+05 1.14e+05  
Ir-191 37.3 (n,2n) data plot Ir-190 11.78 d 605 - 1.33e-03 27.368 1.99e-02 5.92e-02 AAA 1.85e+01 2.70e-01 2.69e-01 2.67e-01 2.26e+04 2.24e+04  
Co-59 100 (n,2n) data plot Co-58 70.86 d 810 - 6.13e-04 3.580 9.69e-04 1.90e-02 AAA 7.54e+01 1.84e-01 1.84e-01 1.82e-01 1.58e+04 1.57e+04  
Ni-58 68.077 (n,2n) data plot Ni-57 1.48 d 1377 - 7.90e-05 1.943 1.02e-04 2.50e-03 AAA 6.74e+00 7.44e-01 7.30e-01 7.24e-01 5.03e+04 4.99e+04  
Fe-54 5.8 (n,p) data plot Mn-54 312.20 d 834 - 5.80e-04 1.145 6.61e-04 1.67e-02 AA 4.49e+00 2.49e-03 2.49e-03 2.47e-03 2.15e+02 2.13e+02  
Fe-54 5.8 (n,a) data plot Cr-51 27.70 d 320 - 5.73e-05 1.145 6.57e-05 1.66e-03 AA 4.46e-01 2.78e-03 2.78e-03 2.76e-03 2.37e+02 2.35e+02  
I-127 100 (n,2n) data plot I-126 12.93 d 666 - 8.63e-04 0.223 8.78e-04 2.40e-02 AA 5.04e+01 6.71e-01 6.69e-01 6.61e-01 5.63e+04 5.56e+04  

Position 6

Configuration L06
neutron flux (scoring pos. 27) 6.60e+06 n/cm2/ppulse
ppulse cycle 1.0 s
filter type and thickness Cd, 0.05 cm
f-neutron flux 2.50e+05 n/cm2/ppulse
irradiation time 0.25 d
cooling time 1 h
counting time 1 d
Iγ 100%
detection efficiency ε 1
sample diameter 1.0 cm
sample thickness 0.1 cm ← used for self-shielding
total number of protons/day 6.05e+17
total number of neutrons/cm2/day 5.70e+11

isotope nat_abund [%] reaction xsection product half-life Eγ [keV] σγ [b] u-SACS [b]† Σ [1/cm] SACS [b] f-SACS [b] priority sat.act. [Bq/g] activity(eoi)‡ [Bq/g] activity [Bq/g] f-activity [Bq/g] counts/g f-counts/g note
Cd-114 28.73 (n,g) data plot Cd-115 2.23 d 527 3.05e-01 2.87e-01 131.975 6.90e-01 6.69e-01 AAA 2.42e+02 1.81e+01 1.79e+01 1.69e+01 1.33e+06 1.25e+06  
Sc-45 100 (n,g) data plot Sc-46 83.79 d 1120 2.72e+01 2.30e+01 1.809 2.20e+01 2.16e+00 AAA 1.54e+06 3.18e+03 3.17e+03 1.42e+01 2.73e+08 1.22e+06  
Lu-176 2.59 (n,g) data plot Lu-177 6.64 d 208 2.10e+03 3.09e+03 3.657 2.72e+03 1.76e+02 AAA 9.84e+05 2.53e+04 2.52e+04 8.44e+01 2.07e+09 6.93e+06  
Ir-191 37.3 (n,g) data plot Ir-192 73.83 d 316 9.54e+02 8.17e+02 27.368 3.77e+02 2.15e+01 AAA 1.95e+05 4.56e+02 4.56e+02 8.95e+00 3.92e+07 7.70e+05  
Au-197 100 (n,g) data plot Au-198 2.69 d 411 9.87e+01 8.93e+01 5.854 7.24e+01 1.21e+01 AAA 7.06e+05 4.41e+04 4.36e+04 4.52e+02 3.32e+09 3.44e+07  
W-186 28.6 (n,g) data plot W-187 1.00 d 685 3.79e+01 3.35e+01 1.591 3.12e+01 5.22e+00 AAA 1.61e+05 2.56e+04 2.49e+04 1.53e+02 1.55e+09 9.55e+06  
In-113 4.3 (n,g) data plot In-114(m1) 49.51 d 190 1.21e+01 1.15e+01 7.011 9.80e+00 1.47e+01 AA 6.27e+03 2.19e+01 2.19e+01 2.45e+00 1.88e+06 2.10e+05  
Fe-58 0.28 (n,g) data plot Fe-59 44.49 d 1099 1.31e+00 1.12e+00 1.145 1.10e+00 1.50e-01 AA 1.84e+02 7.15e-01 7.14e-01 4.00e-03 6.13e+04 3.43e+02  
Ag-109 48.161 (n,g) data plot Ag-110 24.56 d 658 9.03e+01 8.13e+01 3.661 6.96e+01 1.51e+01 A 7.67e+05 5.39e+03 5.38e+03 6.07e+01 4.59e+08 5.17e+06  
 
Ni-58 68.077 (n,p) data plot Co-58 70.86 d 810 - 7.48e-04 1.934 9.53e-04 2.23e-02 AAA 3.44e+01 8.41e-02 8.41e-02 8.31e-02 7.23e+03 7.15e+03  
Al-27 100 (n,a) data plot Na-24 15.00 d 1368 - 8.17e-05 0.100 8.16e-05 2.09e-03 AAA 1.22e+01 1.41e-01 1.40e-01 1.38e-01 1.18e+04 1.17e+04  
Au-197 100 (n,2n) data plot Au-196 6.17 d 355 - 1.48e-03 5.854 3.02e-03 4.80e-02 AAA 2.95e+01 8.16e-01 8.12e-01 8.01e-01 6.64e+04 6.55e+04  
Ir-191 37.3 (n,2n) data plot Ir-190 11.78 d 605 - 1.40e-03 27.368 2.06e-02 5.92e-02 AAA 1.06e+01 1.55e-01 1.55e-01 1.53e-01 1.30e+04 1.29e+04  
Co-59 100 (n,2n) data plot Co-58 70.86 d 810 - 6.43e-04 3.580 1.02e-03 1.91e-02 AAA 4.34e+01 1.06e-01 1.06e-01 1.05e-01 9.11e+03 9.00e+03  
Ni-58 68.077 (n,2n) data plot Ni-57 1.48 d 1377 - 8.29e-05 1.934 1.07e-04 2.51e-03 AAA 3.87e+00 4.27e-01 4.19e-01 4.15e-01 2.89e+04 2.87e+04  
Fe-54 5.8 (n,p) data plot Mn-54 312.20 d 834 - 6.09e-04 1.145 6.93e-04 1.67e-02 AA 2.58e+00 1.43e-03 1.43e-03 1.41e-03 1.23e+02 1.22e+02  
Fe-54 5.8 (n,a) data plot Cr-51 27.70 d 320 - 6.01e-05 1.145 6.89e-05 1.66e-03 AA 2.56e-01 1.60e-03 1.60e-03 1.58e-03 1.36e+02 1.35e+02  
I-127 100 (n,2n) data plot I-126 12.93 d 666 - 9.05e-04 0.224 9.21e-04 2.40e-02 AA 2.88e+01 3.84e-01 3.83e-01 3.78e-01 3.22e+04 3.18e+04  


self-shielding not included
at the end of irradiation

Notes & updates

Comments

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Topic revision: r8 - 2021-03-11 - AlbertoMengoni
 
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