⁷⁴Se   ⁷⁵Se   ⁷⁶Se   ⁷⁷Se   ⁷⁸Se   ⁷⁹Se   ⁸⁰Se   ⁸²Se

Go to isotope

Total MACS at 30keV:

67.1

±

10.8

mb

Cross sections do not include stellar enhancement factors!

Version	Total MACS [mb]	Partial to gs [mb]	Partial to isomer [mb]
1.0	67.1 ± 10.8	-	-
0.2	60.1 ± 9.6	-	-
0.0	109 ± 41*	-	-

(Version 0.0 corresponds to Bao et al.)

Rec. value is from DHK06b, recalculated with normalized energy dependency of tendl15 and corrected for the new 197Au cross section. MACS vs. kT table is from tendl15, uncertainty is 16% as in DHK06b.
Isotopic ratio at kT= 30 keV is IR= 0.604 (DHK06b,ID13b). The more recent data of IKK11 does not show any values for Se-78 in the paper, values only available as private communication to EXFOR. For this reason the values cannot be considered for the rec. value. Note that there is a large discrepancy between the activation measurement of DHK06b and the TOF measurement of IKK11, which is mirrored in the different results from the evaluations. More investigation needed.
Last review: June 2016

original	renorm.	year	type	Comment	Ref
89-31 E(n)= 20-541 keV		2011	c	Pelletron, TOF, Au:ENDF/B-VI and MaG67b	IKK11
60.1 ± 9.6	67.1 ± 10.8	2006,2016	c	VdG, Act. + AMS, Au:RaK88 corrected by 632/586= 1.0785; norm. en. dep. from tendl15	DHK06b
60.1 ± 9.6	64.8	2006	c	VdG, Act. + AMS, Au:RaK88 corrected by 632/586= 1.0785	DHK06b
60.2		2015	e	TENDL-2015 using the TALYS code	tendl15
56.5		2014	e	JEFF-3.2 using calculations from TENDL-2012	jeff32
90.9		2011	e	ENDF/B-VII.1	endfb71
83.5		2011	e	JENDL-4.0	jendl40
67.5		2004	e	JEFF-3.1	jeff31
90.9		2002	e	JENDL-3.3	jendl33
60		1971	s		AGM71
71.3		2005	t	MOST 2005	Gor05
75.6		2002	t	MOST 2002	Gor02
74		2000	t	NON-SMOKER	RaT99
90		1981	t		Har81
49		1978	t		WFH78
Partial cross section to 79mSe:
36.6 ± 4.2 25 keV	40.6 ± 4.6	2013	u	VdG, Act., Au:RaK88 corrected by 632/586= 1.0785; norm. energy dep. from tendl15; unpublished	ID13b
89 ± 14 E(n)= 25 (5) keV		1972	c	Sb-Be, Act., 1/v(E), 127I:832(26) mb	SRS72

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
s	Semiempirical estimates given in the reference
t	Theoretical value
u	Unpublished value

Energy	5keV	8keV	10keV	15keV	20keV	25keV	30keV	40keV	50keV	60keV	80keV	100keV
MACS	224.1	-	123.2	93.0	79.5	71.9	67.1 ± 10.8	60.8	56.8	53.8	49.6	46.7
Xfactor	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00	1.00	0.99
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	1.33	-	1.04	0.96	0.95	0.96	0.98	1.02	1.07	1.11	1.18	1.25

MACS:
Reference: DHK06b,tendl15
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: 2016

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

	78Kr 0.35 321 mb 79Kr 1.46 d 959 mb, β+ 80Kr 2.28 267 mb 81Kr 229.02 ka 607 mb, β+ 82Kr 11.58 90 mb 77Br 2.38 d β+ 78Br 6.46 m β+ 79Br 50.69 622 mb 80Br 17.68 m β- 81Br 49.31 239 mb 76Se 9.37 164 mb 77Se 7.63 418 mb 78Se 23.77 109 mb 79Se 294.99 ka 263 mb, β- 80Se 49.61 42 mb 75As 100 362 mb 76As 1.09 d β- 77As 1.62 d β- 78As 1.51 h β- 79As 9.01 m β- 74Ge 36.73 37.6 mb 75Ge 1.38 h β- 76Ge 7.83 21.5 mb 77Ge 11.30 h β- 78Ge 1.47 h β-

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