¹⁶²Er   ¹⁶⁴Er   ¹⁶⁶Er   ¹⁶⁷Er   ¹⁶⁸Er   ¹⁶⁹Er   ¹⁷⁰Er   ¹⁷¹Er   ¹⁷²Er

Go to isotope

Total MACS at 30keV:

319

±

58

mb

Cross sections do not include stellar enhancement factors!

Version	Total MACS [mb]	Partial to gs [mb]	Partial to isomer [mb]
1.0	319 ± 58	-	-
0.0	338 ± 44	-	-

(Version 0.0 corresponds to Bao et al.)

New rec. value is average of evaluated libraries (endfb71,jendl40). Uncertainty is from covariance data plus deviation between evaluations.
Last review: November 2013

original	renorm.	year	type	Comment	Ref
365 ± 44	338	1978	b	VdG, TOF, 10B:Mag75, Au:628 mb(kT= 30keV)	KYP78
263 ± 73	244	1974	c	VdG, TOF, 10B:SPU71, Au:628 mb(kT= 30keV)	SKP74a
303.2 ± 38.4		2011	e	ENDF/B-VII.1 incl. covariances	endfb71
336.9		2011	e	JENDL-4.0	jendl40
338.5		2004	e	JEFF-3.1	jeff31
338.5		2002	e	JENDL-3.3	jendl33
400		1971	s		AGM71
272		2005	t	MOST 2005	Gor05
324		2002	t	MOST 2002	Gor02
247		2000	t	NON-SMOKER	RaT99
415		1981	t		Har81
317		1976	t		HWF76

Original:MACS [<σ v>/v_T] (mb) for kT=30 keV, based on the published cross sections except where indicated otherwise.
Renorm:MACS [<σ v>/v_T] (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:

b	Calculated from smooth cross sections with model fit: ln(sigma) = a + a1 ln(E) + a2 ln^2(E)
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

Energy	5keV	8keV	10keV	15keV	20keV	25keV	30keV	40keV	50keV	60keV	80keV	100keV
MACS	713 ± 208	-	507 ± 135	432 ± 97	385 ± 77	349 ± 66	319 ± 58	273 ± 48	239 ± 42	213 ± 37	176 ± 31	151 ± 27
Xfactor	1.00	1.00	1.00	0.96	0.88	0.76	0.65	0.49	0.38	0.30	0.21	0.16
SEF	1.00	1.00	1.00	1.01	1.04	1.09	1.13	1.22	1.29	1.36	1.49	1.59
Rate	4.23	-	4.26	4.50	4.77	5.03	5.25	5.58	5.80	5.96	6.20	6.39

MACS:
Reference: 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: 2013

X-factor:
Reference: Rau12
Year: 2012

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

Rate:
Reaction rate N_A<σv> given in 10⁷ cm³/mole/s, including SEF

	168Yb 0.13 1214 mb 169Yb 32.02 d β+ 170Yb 3.04 768 mb 171Yb 14.28 1210 mb 172Yb 21.83 341 mb 167Tm 9.25 d β+ 168Tm 93.10 d β+ 169Tm 100 1129 mb 170Tm 128.59 d 1870 mb, β- 171Tm 1.92 a 486 mb, β- 166Er 33.503 563 mb 167Er 22.869 1425 mb 168Er 26.978 338 mb 169Er 9.39 d 653 mb, β- 170Er 14.91 170 mb 165Ho 100 1280 mb 166Ho 1.12 d β- 167Ho 3.00 h β- 168Ho 2.99 m β- 169Ho 4.72 m β- 164Dy 28.18 212 mb 165Dy 2.33 h β- 166Dy 3.40 d β- 167Dy 6.20 m β- 168Dy 8.70 m β-

Style: (S, M, L, XL or Alberto)