Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Titanium (Z=22)
  44Ti   45Ti   46Ti   47Ti   48Ti   49Ti   50Ti
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
49Ti 50Ti




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.015.0 ± 2.7--
0.022.1 ± 2.1--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is is average from eval. databases (endfb71, tendl15, jendl40). Uncertainty of 9.5% taken from ABM77 plus deviation between evaluations. Note that only the jeff32 evaluation reproduces the experimental value from ABM77 but uses a higher thermal xs than other evaluations (not the recommendation from Mug06 which is based on a single measurement from 1952). All other evaluations give a factor of 2 lower MACS. More investigation needed!!
Last review: May 2016
List of all available values
originalrenorm.yeartypeCommentRef
22.1 ± 2.1
1977c,2Linac, TOF, 6Li, Au:Sat., k=0.9833ABM77
13.2
2015eTENDL-2015 using the TALYS codetendl15
23.8
2014eJEFF-3.2; different thermal xsjeff32
15.8
2011eENDF/B-VII.1endfb71
15.8
2011eJENDL-4.0jendl40
11.6
2006eENDF/B-VII.0endfb7
11.6
2002eJENDL-3.3jendl33
20
1971eAGM71
41.7
2005tMOST 2005Gor05
46.8
2002tMOST 2002Gor02
22.9
2000tNON-SMOKERRaT99
23
1978tWFH78


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:
cDirectly quoted from the reference itself
2Including k from Ref. ABM82, where k is a correction factor which has been applied to the originally reported cross section
eEvaluated value taken directly from the reference
tTheoretical value
MACS, SEF and Reaction Rates for different energies
Energy5keV8keV10keV15keV20keV25keV30keV40keV50keV60keV80keV100keV
MACS
41.1 ± 5.1
-
30.2 ± 3.3
25.0 ± 3.4
20.9 ± 3.3
17.6 ± 3.0
15.0 ± 2.7
11.3 ± 2.2
8.9 ± 1.9
7.4 ± 1.6
5.8 ± 1.4
5.0 ± 1.2
Xfactor1.001.001.001.001.001.001.001.001.001.001.001.00
SEF1.001.001.001.001.001.001.001.001.001.001.001.00
Rate
2.46
-
2.55
2.59
2.50
2.35
2.19
1.91
1.68
1.53
1.39
1.34

MACS:
Reference: endfb71, tendl15, 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: 1977,2016

X-factor:
Reference: Rau12
Year: 2012

SEF (Stellar enhancement factor):
Reference: Rau09
Year: 2009
Comment:

Rate:
Reaction rate NA<σv> given in 106 cm3/mole/s, including SEF
Chart of nuclei
up
left
49Cr
42.30 m
β+
50Cr
4.345
49 mb
51Cr
27.70 d
87 mb, β+
52Cr
83.789
8.8 mb
53Cr
9.501
58 mb
48V
15.97 d
β+
49V
329.05 d
β+
50V
0.25
50 mb
51V
99.75
38 mb
52V
3.74 m
β-
47Ti
7.44
64.4 mb
48Ti
73.72
31.8 mb
49Ti
5.41
22.1 mb
50Ti
5.18
3.6 mb
51Ti
5.76 m
β-
46Sc
83.79 d
β-
47Sc
3.35 d
β-
48Sc
1.82 d
β-
49Sc
57.20 m
β-
50Sc
1.71 m
β-
45Ca
162.62 d
17.5 mb, β-
46Ca
0.004
5.3 mb
47Ca
4.54 d
β-
48Ca
0.187
0.87 mb
49Ca
8.72 m
β-
right
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Style: (S, M, L, XL or Alberto)


Isotope: Titanium