| s-process | p-process |
Available isotopes for Strontium (Z=38)
Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
84Sr 
85Sr
85Sr
| Total MACS at 30keV: | 321 | ± | 21 | mb |
| Partial c.s. to ground state: | 119 | ± | 9 | mb |
| Partial c.s. to isomer: | 202 | ± | 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 | 321 ± 21 | 119 ± 9 | 202 ± 11 |
| 0.2 | 300 ± 17 | 111 ± 8 | 190 ± 10 |
| 0.0 | 368 ± 126* | - | - |
(Version 0.0 corresponds to Bao et al.)
Comment
Rec. value is from DHK06a (normalized by 632/586= 1.0785). New MACS vs. kT table from normalized energy dependencies of endfb71 and jendl40. An additional uncertainty is introduced by the deviation of both evaluations. Isomeric ratio at kT= 25 keV is IR= 0.63.
Last review: December 2016
Last review: December 2016
List of all available values
| original | renorm. | year | type | Comment | Ref |
300 ± 17 | 321 ± 21 | 2006,2015 | c | VdG, Act., Au:RaK88 corrected by 632/586= 1.0785; renorm. using en. dep. from endfb71 and jendl40 | DHK06a |
261.1 | 2015 | e | TENDL-2015 using the TALYS code | tendl15 | |
224.0 | 2014 | e | JEFF-3.2 using calculations from TENDL-2012 | jeff32 | |
319.2 | 2011 | e | ENDF/B-VII.1 | endfb71 | |
308.3 | 2011 | e | JENDL-4.0 | jendl40 | |
233.8 | 2004 | e | JEFF-3.1 | jeff31 | |
330 | 1971 | s | AGM71 | ||
244 | 2005 | t | MOST 2005 | Gor05 | |
74.2 | 2002 | t | MOST 2002 | Gor02 | |
393 | 2000 | t | NON-SMOKER | RaT99 | |
144 ± 47 | 1988 | t | ZZC88 | ||
317 | 1981 | t | Har81 | ||
285 | 1976 | t | HWF76 | ||
| Partial cross section to 85gSr: | |||||
111 ± 8 | 119 ± 9 | 2006,2015 | c | VdG, Act., Au:RaK88 corrected by 632/586= 1.0785 | DHK06a |
| Partial cross section to 85mSr: | |||||
190 ± 10 | 202 ± 11 | 2006,2015 | c | VdG, Act., Au:RaK88 corrected by 632/586= 1.0785 | DHK06a |
470 ± 56E(n)= 25 (5) | 1972 | c | Sb-Be, Act., 1/v(E), 127I:832 (26) mb (24 keV) | SRS72 | |
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:
| c | Directly quoted from the reference itself |
| e | Evaluated value taken directly from the reference |
| s | Semiempirical estimates given in 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 | 745 ± 70 | - | 552 ± 47 | 455 ± 33 | 395 ± 26 | 352 ± 20 | 321 ± 21 | 278 ± 19 | 250 ± 18 | 231 ± 17 | 204 ± 15 | 188 ± 13 |
| Xfactor | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| SEF | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Rate | 4.43 | - | 4.64 | 4.69 | 4.70 | 4.68 | 4.68 | 4.68 | 4.70 | 4.76 | 4.85 | 5.01 |
MACS:
Reference: DHK06,endfb71,jendl40
Procedure: 'e+t' (The MACS from kT=5 keV to 100 keV are derived from calculated cross sections, which are then normalized to experimental data, e.g. to the values at kT=25 keV obtained in activation measurements. In these cases the uncertainties should be linearly increased below 25 and above 30 keV to reach about 30% at the extreme kT values.)
Year: 2015
X-factor:
Reference:
Year:
SEF (Stellar enhancement factor):
Reference:
Year:
Comment:
Rate:
Reaction rate NA<σv> given in 107 cm3/mole/s, including SEF
Chart of nuclei
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Isotope: Strontium