¹²⁷I   ¹²⁸I   ¹²⁹I   ¹³⁵I

Go to isotope

Total MACS at 30keV:

438

±

86

mb

Cross sections do not include stellar enhancement factors!

Version	Total MACS [mb]	Partial to gs [mb]	Partial to isomer [mb]
1.0	438 ± 86	-	-
0.0	441 ± 22	-	-

(Version 0.0 corresponds to Bao et al.)

New rec. value is from recent evaluations (endfb71,jendl40) which fits data of Mac83a and NBL04, NBB06. However, there is an indication in NBL04 and NBB06 that the cross section towards higher energies (beyond 40 keV) is about 10% lower than given in the evaluations. More investigation needed. Uncertainties are from covariance data of endfb71 plus deviation of both evaluations.
Last review: July 2013

original	renorm.	year	type	Comment	Ref
370 ± 20 E(n)= 24.8-40.9 keV		2006	c	Linac, TOF, BF3, 10B	NBB06
446 ± 44 E(n)= 30 keV		2004	c	Linac, TOF, BF3, 10B	NBL04
441 ± 22		1983	c	Linac, TOF, 6Li, Au:Sat.	Mac83a
437.4 ± 85.5		2011	e	ENDF/B-VII.1 plus covariances	endfb71
438.7		2011	e	JENDL-4.0	jendl40
379.5		2004	e	JEFF-3.1	jeff31
441.0		2002	e	JENDL-3.3	jendl33
490		1981	e		KNM81
497		2005	t	MOST 2005	Gor05
585		2002	t	MOST 2002	Gor02
400		2000	t	NON-SMOKER	RaT99
582		1981	t		Har81
529		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:

c	Directly quoted from the reference itself
e	Evaluated value taken directly from the reference
t	Theoretical value

Energy	5keV	8keV	10keV	15keV	20keV	25keV	30keV	40keV	50keV	60keV	80keV	100keV
MACS	1078 ± 171	-	785 ± 133	641 ± 115	550 ± 103	486 ± 93	438 ± 86	371 ± 76	327 ± 68	295 ± 63	253 ± 55	225 ± 50
Xfactor	1.00	0.98	0.97	0.92	0.88	0.85	0.82	0.79	0.76	0.74	0.72	0.70
SEF	1.00	0.99	0.99	0.97	0.96	0.95	0.94	0.93	0.92	0.91	0.90	0.89
Rate	6.40	-	6.52	6.40	6.24	6.10	5.97	5.77	5.64	5.54	5.42	5.31

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

	129Cs 1.34 d β+ 130Cs 29.21 m β+ 131Cs 9.69 d β+ 132Cs 6.48 d β+ 133Cs 100 509 mb 128Xe 1.91 248 mb 129Xe 26.4 472 mb 130Xe 4.071 141 mb 131Xe 21.232 340 mb 132Xe 26.909 64.6 mb 127I 100 635 mb 128I 24.99 m β- 129I 15.70 Ma 441 mb, β- 130I 12.36 h β- 131I 8.02 d β- 126Te 18.84 81.3 mb 127Te 9.35 h β- 128Te 31.74 44.4 mb 129Te 1.16 h β- 130Te 34.08 14.7 mb 125Sb 2.76 a 260 mb, β- 126Sb 12.35 d β- 127Sb 3.85 d β- 128Sb 9.01 h β- 129Sb 4.40 h β-

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