Karlsruhe Astrophysical Database of Nucleosynthesis in Stars
s-process
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p-process
Available isotopes for Yttrium (Z=39)
  89Y   90Y   91Y
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Recommended MACS30 (Maxwellian Averaged Cross Section @ 30keV)
89Y 90Y




Cross sections do not include stellar enhancement factors!
History
VersionTotal MACS [mb]Partial to gs [mb]Partial to isomer [mb]
1.020.5 ± 0.6--
0.019.0 ± 0.6--

(Version 0.0 corresponds to Bao et al.)
Comment
New rec. value is weighted average from KZB90 (normalized by 632/586= 1.0785). Normalized MACS vs. kT table from recent evaluation (endfb71). Perfect agreement between activation and TOF measurement.
Last review: January 2017
List of all available values
originalrenorm.yeartypeCommentRef
19.0 ± 0.6
20.5 ± 0.61990,2015cVdG, Act., 1/v(kT), Au:RaK88 corrected by 632/586= 1.0785KZB90
21 ± 3
1978c,2Linac, TOF, 6Li, Au:Sat., k=1.0360MAM78a
13.5 ± 1.3
1977c,2Linac, TOF, 6Li, Au:Sat., k=1.0360BAM77
23.2
2015eTENDL-2015 using the TALYS codetendl15
17.0
2014eJEFF-3.2 using calculations from TENDL-2012jeff32
21.4 ± 1.8
2011eENDFB/-VII.1endfb71
20.2
2011eJENDL-4.0jendl40
17.0
2006eENDFB/-VII.0endfb7
27.3
2004eJEFF-3.1jeff31
20.6
2002eJENDL-3.3jendl33
21 ± 4
1971eAGM71
16.6
2005tMOST 2005Gor05
18.8
2002tMOST 2002Gor02
88.4
2000tNON-SMOKERRaT99
32
1981tHar81
41
1976tHWF76


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
68.6 ± 5.6
-
40.9 ± 3.8
31.0 ± 2.9
25.9 ± 2.3
22.7 ± 2.0
20.5 ± 0.6
17.5 ± 1.4
15.7 ± 1.2
14.4 ± 1.0
12.7 ± 0.9
11.7 ± 0.8
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
4.08
-
3.44
3.19
3.08
3.02
2.99
2.94
2.95
2.97
3.02
3.11

MACS:
Reference: KZB90,endfb71
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: 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
89Nb
2.03 h
β+
90Nb
14.60 h
β+
91Nb
680.04 a
β+
92Nb
34.70 Ma
β+
93Nb
100
266 mb
88Zr
83.40 d
β+
89Zr
3.27 d
β+
90Zr
51.45
19.4 mb
91Zr
11.22
60 mb
92Zr
17.15
33 mb
87Y
3.33 d
β+
88Y
106.62 d
β+
89Y
100
19 mb
90Y
2.67 d
β-
91Y
58.51 d
β-
86Sr
9.86
64 mb
87Sr
7
92 mb
88Sr
82.58
6.2 mb
89Sr
50.57 d
19 mb, β-
90Sr
28.90 a
β-
85Rb
72.17
234 mb
86Rb
18.64 d
202 mb, β-
87Rb
49.69x109 y
15.7 mb, β-
88Rb
17.77 m
β-
89Rb
15.15 m
β-
right
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Style: (S, M, L, XL or Alberto)


Isotope: Yttrium