Table 6: Abundance ratios derived and atomic parameters adopted.
Species $\lambda$ $\chi_{\rm ex}$ C₆ log gf [X/Fe] EW (m ${\rm \AA}$ )

( ${\rm \AA}$ ) (eV) ZOC04 present Arcturus HP1-2 HP1-3 HP1-2 HP1-3

[OI] 6300.311 0.00 0.30E-31 -9.716 -9.716 +0.20 +0.4 +0.4 34.8 33.2

NaI 6154.230 2.10 0.90E-31 -1.56¹ -1.56 -0.2 0.0 +0.0 19.0 33.8

NaI 6160.753 2.10 0.30E-31 -1.26¹ -1.26 -0.2 0.0 +0.0: 22.0 -

MgI 6318.720 5.11 0.30E-31 -2.10² -2.10 +0.30 0.0 +0.20 16.2 32.4

MgI 6319.242 5.11 0.30E-31 -2.36² -2.36 +0.30 0.0 +0.20 12.8 22.6

MgI 6319.490 5.11 0.30E-31 -2.80² -2.90 +0.30 - +0.20 - 3.6

MgI 6765.450 5.75 0.30E-31 -1.94³ -1.94 +0.30 0.0 +0.20: 7.4 7.1

SiI 5948.548 5.08 2.19E-30^a -1.17² -1.17 +0.25 +0.3 +0.3 80.8 58.2

SiI 6142.494 5.62 0.30E-31 -1.50² -1.58 +0.25 +0.3 +0.3 22.3 18.7

SiI 6145.020 5.61 0.30E-31 -1.45² -1.5 +0.25 +0.3 +0.3 21.0 20.0

SiI 6155.142 5.62 0.30E-30 -0.85² -0.85 +0.35 +0.3 +0.3 53.1 55.4

SiI 6237.328 5.61 0.30E-30 -1.01³ -1.1 +0.25 +0.2 +0.3 29.6 39.0

SiI 6243.823 5.61 0.30E-32 -1.30⁴ -1.30 +0.25 - +0.2 - 19.7

SiI 6414.987 5.87 0.30E-30 -1.13² -1.13 +0.35 - +0.3 - 21.7

SiI 6721.844 5.86 0.90E-30 -1.17³ -1.17 +0.25 +0.3 +0.3 23.5 30.5

CaI 6102.727 1.88 4.54E-31^a -0.79¹ -0.93 +0.25 +0.1 +0.1 137.7 143.8

CaI 6156.030 2.52 4.0E-31^aa -2.39² -2.59 +0.20 -0.1 +0.2 2.3 14.5

CaI 6161.295 2.51 4.0E-31^aa -1.02¹ -1.42 +0.10 +0.0 +0.1 37.2 -

CaI 6162.167 1.89 3.0E-31^aa -0.09¹ -0.09 -0.10 +0.0 +0.1 200.0 -

CaI 6166.440 2.52 3.97E-31^aa -0.90¹ -1.156 +0.20 +0.0 +0.1 78.2 104.2

CaI 6169.044 2.52 3.97E-31^aa -0.54¹ -0.90 +0.10 +0.0 +0.1 72.6 105.4

CaI 6169.564 2.52 4.0E-31^aa -0.27¹ -0.63 +0.10 +0.0 +0.1 98.0 -

CaI 6439.080 2.52 3.4E-32^aa +0.3⁴ +0.3 +0.00 +0.0 +0.1: 166.5 -

CaI 6455.605 2.52 3.39E-32^aa -1.35¹ -1.55 +0.10 +0.0: - 55.2 -

CaI 6464.679 2.52 3.4E-32^aa -2.10² -2.48 +0.40 - - - -

CaI 6471.668 2.52 3.39E-32^aa -0.59¹ -0.80 +0.00 -0.1 +0.1 74.0 95.6

CaI 6493.788 2.52 3.37E-32^aa +0.14¹ 0.0 -0.15 -0.1 -0.1 141.0 146.9

CaI 6499.654 2.52 3.37E-32^aa -0.59¹ -0.85 -0.15 -0.1 +0.1 81.0 110.9

CaI 6508.846 2.52 3.37E-32^aa -2.50³ -2.51 +0.10 - - - -

CaI 6572.779 0.00 1.75E-32^aa -4.29¹ -4.32 +0.10 -0.1 +0.1 63.4 111.3

CaI 6717.687 2.71 4.1E-31^aa -0.61¹ -0.61 +0.10 -0.1 +0.1 - 131.9

TiI 5866.452 1.07 1.44E-32^aa -0.84¹ -0.84 +0.1 +0.0 +0.0 80.5 109.5

TiI 5922.110 1.05 2.32E-32^aa -1.47¹ -1.50 +0.1 +0.1 +0.0 56.3 66.8

TiI 5965.835 1.88 2.14E-32^a -0.41¹ -0.45 +0.1 +0.1 +0.0 48.4 77.3

TiI 5978.549 1.87 1.43E-32^aa -0.50¹ -0.55 +0.1 +0.1 +0.0 27.4 52.4

TiI 6064.626 1.05 1.37E-32^aa -1.94¹ -1.94 +0.1 - - - -

TiI 6091.177 2.27 2.59E-32^aa -0.42¹ -0.42 +0.0 +0.1 +0.0 18.1 45.7

TiI 6126.224 1.07 1.37E-32^aa -1.43¹ -1.43 +0.0 +0.0 +0.0: 50.0 68.3

TiI 6258.110 1.44 3.17E-32^aa -0.36¹ -0.36 +0.1 -0.1 +0.0 63.5 113.2

TiI 6261.106 1.43 4.68E-32^a -0.48¹ -0.48 +0.1 +0.1 +0.0 91.3 120.9

TiI 6303.767 1.44 3.12E-32^aa -1.57¹ -1.57 +0.1 +0.1 +0.1 16.1 40.6

TiI 6312.238 1.46 3.17E-32^aa -1.69¹ -1.69 +0.2: +0.1 +0.0 - 31.2

TiI 6336.113 1.44 1.86E-32^aa -1.74¹ -1.74 +0.1 - +0.1: 22.2 32.8

TiI 6508.154 1.43 1.46E-32^a -2.05³ -2.05 +0.1 - +0.0: - 10.9

TiI 6554.238 1.44 1.81E-32^aa -1.22¹ -1.22 +0.1 -0.1 +0.0 22.7 67.3

TiI 6556.077 1.46 1.81E-32^aa -1.07¹ -1.07 +0.1 +0.1 +0.0 41.3 68.6

TiI 6599.113 0.90 1.96E-32^aa -2.09¹ -2.09 +0.1 +0.1 +0.0 20.8 55.1

TiI 6743.127 0.90 0.30E-31 -1.63¹ -1.73 +0.1 -0.2 +0.0 32.9 79.7

TiII 6491.580 2.06 0.30E-31 -2.10^1* -2.10 +0.1 +0.1 +0.3: 73.2 79.1

TiII 6559.576 2.05 0.30E-31 -2.48³ -2.35 +0.1 - +0.1 - 5.4

TiII 6606.970 2.06 0.30E-31 -2.79¹ -2.85 +0.1 +0.1 +0.0 22.9 22.9

BaII 6141.727 0.70 hfs hfs -0.20 +0.2 +0.2 158.1 162.1

BaII 6496.908 0.60 hfs hfs -0.20 +0.0 +0.2 192.0 179.6

LaII 6390.480 0.32 hfs hfs -0.30 0.0 +0.0 18.0 20.3

EuII 6645.127 1.38 hfs hfs +0.30 +0.0 +0.3 17.4 31.9

^a Damping constants computed following Barklem et al. (1998, 2000); ^aa damping constants computed as in ^a, decreased by a factor 1.5 (C₆/1.5). Other C₆ values are van der Waals classical ones, as described in Zoccali et al. (2004). Column 5 reports the log gf used in Zoccali et al. (2004), adopted from ¹ NIST/VALD; ² Barbuy et al. (1999); ³ McWilliam & Rich (1994); ⁴ Bensby et al. (2004), whereas Col. 6 gives the values derived in this work from a fit to the solar spectrum; ^* for TiII 6491.58 ${\rm \AA}$ line, the NIST log gf = -2.10 is different from the VALD value of log gf = -1.793.

**Table 6:** Abundance ratios derived and atomic parameters adopted.
Species	$\lambda$	$\chi_{\rm ex}$	C₆	log gf	[X/Fe]	EW (m ${\rm \AA}$ )
	( ${\rm \AA}$ )	(eV)		ZOC04	present	Arcturus	HP1-2	HP1-3	HP1-2	HP1-3
[OI]	6300.311	0.00	0.30E-31	-9.716	-9.716	+0.20	+0.4	+0.4	34.8	33.2
NaI	6154.230	2.10	0.90E-31	-1.56¹	-1.56	-0.2	0.0	+0.0	19.0	33.8
NaI	6160.753	2.10	0.30E-31	-1.26¹	-1.26	-0.2	0.0	+0.0:	22.0	-
MgI	6318.720	5.11	0.30E-31	-2.10²	-2.10	+0.30	0.0	+0.20	16.2	32.4
MgI	6319.242	5.11	0.30E-31	-2.36²	-2.36	+0.30	0.0	+0.20	12.8	22.6
MgI	6319.490	5.11	0.30E-31	-2.80²	-2.90	+0.30	-	+0.20	-	3.6
MgI	6765.450	5.75	0.30E-31	-1.94³	-1.94	+0.30	0.0	+0.20:	7.4	7.1
SiI	5948.548	5.08	2.19E-30^a	-1.17²	-1.17	+0.25	+0.3	+0.3	80.8	58.2
SiI	6142.494	5.62	0.30E-31	-1.50²	-1.58	+0.25	+0.3	+0.3	22.3	18.7
SiI	6145.020	5.61	0.30E-31	-1.45²	-1.5	+0.25	+0.3	+0.3	21.0	20.0
SiI	6155.142	5.62	0.30E-30	-0.85²	-0.85	+0.35	+0.3	+0.3	53.1	55.4
SiI	6237.328	5.61	0.30E-30	-1.01³	-1.1	+0.25	+0.2	+0.3	29.6	39.0
SiI	6243.823	5.61	0.30E-32	-1.30⁴	-1.30	+0.25	-	+0.2	-	19.7
SiI	6414.987	5.87	0.30E-30	-1.13²	-1.13	+0.35	-	+0.3	-	21.7
SiI	6721.844	5.86	0.90E-30	-1.17³	-1.17	+0.25	+0.3	+0.3	23.5	30.5
CaI	6102.727	1.88	4.54E-31^a	-0.79¹	-0.93	+0.25	+0.1	+0.1	137.7	143.8
CaI	6156.030	2.52	4.0E-31^aa	-2.39²	-2.59	+0.20	-0.1	+0.2	2.3	14.5
CaI	6161.295	2.51	4.0E-31^aa	-1.02¹	-1.42	+0.10	+0.0	+0.1	37.2	-
CaI	6162.167	1.89	3.0E-31^aa	-0.09¹	-0.09	-0.10	+0.0	+0.1	200.0	-
CaI	6166.440	2.52	3.97E-31^aa	-0.90¹	-1.156	+0.20	+0.0	+0.1	78.2	104.2
CaI	6169.044	2.52	3.97E-31^aa	-0.54¹	-0.90	+0.10	+0.0	+0.1	72.6	105.4
CaI	6169.564	2.52	4.0E-31^aa	-0.27¹	-0.63	+0.10	+0.0	+0.1	98.0	-
CaI	6439.080	2.52	3.4E-32^aa	+0.3⁴	+0.3	+0.00	+0.0	+0.1:	166.5	-
CaI	6455.605	2.52	3.39E-32^aa	-1.35¹	-1.55	+0.10	+0.0:	-	55.2	-
CaI	6464.679	2.52	3.4E-32^aa	-2.10²	-2.48	+0.40	-	-	-	-
CaI	6471.668	2.52	3.39E-32^aa	-0.59¹	-0.80	+0.00	-0.1	+0.1	74.0	95.6
CaI	6493.788	2.52	3.37E-32^aa	+0.14¹	0.0	-0.15	-0.1	-0.1	141.0	146.9
CaI	6499.654	2.52	3.37E-32^aa	-0.59¹	-0.85	-0.15	-0.1	+0.1	81.0	110.9
CaI	6508.846	2.52	3.37E-32^aa	-2.50³	-2.51	+0.10	-	-	-	-
CaI	6572.779	0.00	1.75E-32^aa	-4.29¹	-4.32	+0.10	-0.1	+0.1	63.4	111.3
CaI	6717.687	2.71	4.1E-31^aa	-0.61¹	-0.61	+0.10	-0.1	+0.1	-	131.9
TiI	5866.452	1.07	1.44E-32^aa	-0.84¹	-0.84	+0.1	+0.0	+0.0	80.5	109.5
TiI	5922.110	1.05	2.32E-32^aa	-1.47¹	-1.50	+0.1	+0.1	+0.0	56.3	66.8
TiI	5965.835	1.88	2.14E-32^a	-0.41¹	-0.45	+0.1	+0.1	+0.0	48.4	77.3
TiI	5978.549	1.87	1.43E-32^aa	-0.50¹	-0.55	+0.1	+0.1	+0.0	27.4	52.4
TiI	6064.626	1.05	1.37E-32^aa	-1.94¹	-1.94	+0.1	-	-	-	-
TiI	6091.177	2.27	2.59E-32^aa	-0.42¹	-0.42	+0.0	+0.1	+0.0	18.1	45.7
TiI	6126.224	1.07	1.37E-32^aa	-1.43¹	-1.43	+0.0	+0.0	+0.0:	50.0	68.3
TiI	6258.110	1.44	3.17E-32^aa	-0.36¹	-0.36	+0.1	-0.1	+0.0	63.5	113.2
TiI	6261.106	1.43	4.68E-32^a	-0.48¹	-0.48	+0.1	+0.1	+0.0	91.3	120.9
TiI	6303.767	1.44	3.12E-32^aa	-1.57¹	-1.57	+0.1	+0.1	+0.1	16.1	40.6
TiI	6312.238	1.46	3.17E-32^aa	-1.69¹	-1.69	+0.2:	+0.1	+0.0	-	31.2
TiI	6336.113	1.44	1.86E-32^aa	-1.74¹	-1.74	+0.1	-	+0.1:	22.2	32.8
TiI	6508.154	1.43	1.46E-32^a	-2.05³	-2.05	+0.1	-	+0.0:	-	10.9
TiI	6554.238	1.44	1.81E-32^aa	-1.22¹	-1.22	+0.1	-0.1	+0.0	22.7	67.3
TiI	6556.077	1.46	1.81E-32^aa	-1.07¹	-1.07	+0.1	+0.1	+0.0	41.3	68.6
TiI	6599.113	0.90	1.96E-32^aa	-2.09¹	-2.09	+0.1	+0.1	+0.0	20.8	55.1
TiI	6743.127	0.90	0.30E-31	-1.63¹	-1.73	+0.1	-0.2	+0.0	32.9	79.7
TiII	6491.580	2.06	0.30E-31	-2.10^1*	-2.10	+0.1	+0.1	+0.3:	73.2	79.1
TiII	6559.576	2.05	0.30E-31	-2.48³	-2.35	+0.1	-	+0.1	-	5.4
TiII	6606.970	2.06	0.30E-31	-2.79¹	-2.85	+0.1	+0.1	+0.0	22.9	22.9
BaII	6141.727	0.70		hfs	hfs	-0.20	+0.2	+0.2	158.1	162.1
BaII	6496.908	0.60		hfs	hfs	-0.20	+0.0	+0.2	192.0	179.6
LaII	6390.480	0.32		hfs	hfs	-0.30	0.0	+0.0	18.0	20.3
EuII	6645.127	1.38		hfs	hfs	+0.30	+0.0	+0.3	17.4	31.9

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