³He

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Total MACS at 30keV:

0.0163

±

0.0016

mb

Cross sections do not include stellar enhancement factors!

Version	Total MACS [mb]	Partial to gs [mb]	Partial to isomer [mb]
1.0	0.0163 ± 0.0016	-	-
0.3	0.0076 ± 0.0006	-	-

(Version 0.0 corresponds to Bao et al.)

New recommended value from JENDL 3.3 and 4.0 database which fit experimental data points from KML93,WAP91,WPA89,ABW79 between 24.5 and 570 keV. Assumed 10 % uncertainty like in WAP91.
Last review: May 8th, 2012

original	renorm.	year	type	Comment	Ref
0.0192 ± 0.0033 E(n)= 135 keV		1993	c	VdG, Act., 7Be activity	KML93
0.0091 ± 0.0008 E(n)= 24.5 keV		1991	c	F.N.B., Act., Au: 623(9) mb (24.5 keV)	WAP91
0.0092 ± 0.0020 E(n)= 24.5 keV		1989	c	F.N.B., Act., Au: 623(9) mb (24.5 keV)	WPA89
0.012 ± 0.006 E(n)= 24.5 keV		1979	c		ABW79
0.02126		2011	e	ENDF/B-VII.1	endfb71
0.0163		2011	e	JENDL 4.0	jendl40
0.0000248		2006	e	ENDF/B-VII.0; 1/v extrapolation from thermal xs	endfb7
0.0000248		2004	e	JEFF 3.1; 1/v extrapolation from thermal xs	jeff31

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

Energy	5keV	8keV	10keV	15keV	20keV	25keV	30keV	40keV	50keV	60keV	80keV	100keV
MACS	0.0074	-	0.0101	0.0121	0.0137	0.0151	0.0163 ± 0.0016	0.0184	0.0201	0.0216	0.0242	0.0262
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	5.05	-	9.75	14.31	18.71	23.05	27.26	35.54	43.40	51.09	66.10	80.00

MACS:
Reference: WAP91,KML93,jendl33
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: 1991,1993

X-factor:
Please note: X-factors for this element have not been calculated but are expected to be close to 1.

SEF (Stellar enhancement factor):
Reference:
Year:
Comment:
Please note: SEF for this element have not been calculated but are expected to be close to 1.

Rate:
Reaction rate N_A<σv> given in 10² cm³/mole/s, including SEF

	5Be 0.00 ms P 6Be 0.00 ms P 7Be 53.22 d β+ 3Li 0.00 ms P 4Li 0.00 ms P 5Li 0.00 ms α 6Li 7.59 3He 0.000137 0.0076 mb 4He 99.9999 5He 0.00 ms α 1H 99.985 0.254 mb 2H 0.015 3H 12.32 a β- 4H 0.00 ms N 1Nn 10.24 m β-

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