| s-process | p-process |
Available isotopes for Tantalum (Z=73)
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
181Ta 
182Ta
182Ta
| Total MACS at 30keV: | 814 | ± | 11 | mb |
Cross sections do not include stellar enhancement factors!
History
| Version | Total MACS [mb] | Partial to gs [mb] | Partial to isomer [mb] |
|---|---|---|---|
| 1.0 | 814 ± 11 | - | - |
| 0.3 | 766 ± 15 | - | - |
(Version 0.0 corresponds to Bao et al.)
Comment
Rec. value is from WVK90, in perfect agreement with BKP92. Extrapolation to higher and lower energies done with normalized (f=0.965) average of evaluated libraries (endfb71,jendl40).
Last review: In process
Last review: In process
List of all available values
| original | renorm. | year | type | Comment | Ref |
761 ± 38 | 814 ± 11 | 1992 | d | VdG, TOF, Au+Ag+Nd+etc.:Sat. | BKP92 |
788 ± 33 | 1991 | c | VdG, Act., Au:RaK88,Mac82e | Tep91 | |
766.2 ± 15.1 | 1990 | c | VdG, TOF, Au:RaK88,Mac82e | WVK90 | |
890 ± 51kT= 24 keV | 828 | 1990 | c | VdG, Act., 1/v(kT), Au:655 (23) mb (kT= 24 keV) | XWY90 |
703 ± 35 | 1984 | c | Linac, TOF, 6Li, Au:Sat. | Mac84a | |
770 ± 38 | 1982 | c | VdG, TOF, Au:B-V | RFW82 | |
834 ± 74 | 777 | 1981 | c | Linac, Act., Au:624 (23) mb (kT= 30 keV) | ALL81 |
771 ± 48 | 1980 | b | Linac, TOF, 10B:B-IV | YSE80 | |
960 ± 50 | 894 | 1980 | c | VdG, Act., 1/v(kT), Au:B-IV (610 (15) mb) | BeK80 |
787 ± 100 | 1978 | c | F.N.B., Act., 1/v(E), 10B, Ag:Sat. | YDM78 | |
855 ± 86 | 792 | 1977 | b | VdG, TOF, 10B:Mag75, Au:628 mb (kT= 30 keV) | KYM77 |
1393 ± 153E(n)= 23 (5)keV | 1045 | 1973 | c | Sb-Be, Act., 1/v(E), 127I:836 mb (23 keV) | SSR73 |
925 ± 140 | 882 | 1972 | c | VdG, TOF, In:740(70) mb | LDM72 |
850 ± 190 | 1970 | c | Linac, TOF, 10B:BNL-325 | FLF70 | |
850.3 | 2011 | e | ENDF/B-VII.1 | endfb71 | |
750.6 | 2011 | e | JENDL-4.0 | jendl40 | |
793.4 | 2006 | e | ENDF/B-VII.0 | endfb7 | |
752.8 | 2004 | e | JEFF-3.1 | jeff31 | |
752.8 | 2002 | e | JENDL-3.3 | jendl33 | |
719 | 1997 | e | Mug97 | ||
800 ± 80 | 1971 | e | AGM71 | ||
714 | 2005 | t | MOST 2005 | Gor05 | |
1770 | 2002 | t | MOST 2002 | Gor02 | |
974 | 2000 | t | NON-SMOKER | RaT99 | |
1098 | 1981 | t | Har81 | ||
1160 | 1976 | t | HWF76 |
Original:MACS [<σ v>/vT] (mb) for kT=30 keV, based on the published cross sections except where indicated otherwise.
Renorm:MACS [<σ v>/vT] (mb) for kT=30 keV for which the reference or standard cross section was meanwhile improved.
Type: The letters and numbers in the column labelled 'type' give information on how the cross section has been obtained:
| d | Renormalized 2017 based on updated Au measurement |
| c | Directly quoted from the reference itself |
| b | Calculated from smooth cross sections with model fit: ln(sigma) = a + a1 ln(E) + a2 ln^2(E) |
| e | Evaluated value taken directly from the reference |
| t | Theoretical value |
MACS, SEF and Reaction Rates for different energies
| Energy | 5keV | 8keV | 10keV | 15keV | 20keV | 25keV | 30keV | 40keV | 50keV | 60keV | 80keV | 100keV |
| MACS | 2841 ± 202 | 2026 ± 93 | 1727 ± 64 | 1297 ± 33 | 1064 ± 21 | 917 ± 16 | 814 ± 13 | 678 ± 10 | 590 ± 9 | 526 ± 10 | 440 ± 12 | 383 ± 14 |
| Xfactor | 0.72 | 0.64 | 0.59 | 0.54 | 0.51 | 0.49 | 0.48 | 0.46 | 0.43 | 0.41 | 0.38 | 0.34 |
| SEF | 1.02 | 1.02 | 1.02 | 1.02 | 1.02 | 1.03 | 1.03 | 1.03 | 1.02 | 1.01 | 0.99 | 0.98 |
| Rate | 1.71 | 1.54 | 1.47 | 1.36 | 1.29 | 1.25 | 1.21 | 1.17 | 1.13 | 1.09 | 1.04 | 0.99 |
MACS:
Reference: Rei18
Procedure: 'd' (Renormalized 2017 based on updated Au measurement)
Year: 2018
X-factor:
Reference:
Year:
SEF (Stellar enhancement factor):
Reference:
Year:
Comment:
Rate:
Reaction rate NA<σv> given in 108 cm3/mole/s, including SEF
Chart of nuclei
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Isotope: Tantalum