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Reference_Lines@2GeV

Guideline values lines for typical organic samples. Optimise the gap about once a week.

Photoemission at 2.0 GeV, 310 mA in ring.

  Grating Slits
(micron)
Gap Photon energy (eV) Kinetic energy (eV) Step (eV) Pass Energy Typical photodiode current, microamp Calibration (eV)
VB G3 30/200 74.74 100 60-97,
80-98
0.05 5 270 12.62eV (H2O, first IP [1])
S 2p3/2                 180.21 eV ( SF6 : 2p3/2 [2,5]) 181.5 2p1/2 [5])
Ar 2p                 248.63(Ar 2p3/2) ; 250.78 (Ar 2p1/2) [5]
C 1s G4 30/50 81.6
77.6
382
332
86-97
36-47
0.05 10 2.8 297.70 eV (CO[3])
Ar 2s                 326.3 eV
N 1s G5 30/50 91.5 495 88-95 0.05 10 2.4 409.5 eV (N[5])
O 1s G5 30/50 81.43
81.65
628 90-96 0.1 10 3.4 541.08 eV (CO[5])
Ne 1s G5               870.21 eV (Ne [5])
F 1s G5               694.6 eV (SF6 [6])
Xe 3d5/2 G5               676.4 eV (Xe [7])

[1]      A. W. Potts, W. C. Price, Proc. Roy. Soc. A326 (1972) 181
[2]      J. E. True, T. D. Thomas, R. W. Winter, G. L. Gard, Inorg. Chem. 42 (2003) 4437
[3]      V. Myrseth,  J. D. Bozek, E. Kukk,  L. J. Sæthre,  T. D. Thomas, J. Electron Spectrosc. Relat. Phenom. 2002, 122, 57.
[4]      T. D. Thomas, R. W. Shaw, J. Electron Spectrosc. Relat. Phenom.  5 (1974) 1081.
[5]       L Petterson, J. Nordegren, L. Selander, K. Siegbahn, H. Agren JESRP 27 (1982) 29
[6]       K. Siegbahn, ESCA Applied to Free Molecules (North-Holland, Amsterdam, 1971, p.94
[7]       K. Siegbahn,  C.  Nordling, G.  Johansson,  et al.  “ESCA Applied to Free  Molecules,” North-Holland Publishing Co., Amsterdam, 1969, pp 104-136.

NEXAFS at 2.0 GeV, 310 mA in ring

  Grating Slits (micron) Gap (mm) Photon energy (eV) Step (eV) Comment Typical lifetime widths of core holes. Calibration 
C 1s G4 20/20
20/30
74.0
75.0 
73.3/73.9/74.4
282-295
292-305
283-305
0.025
0.050
Slit size depends on signal level.
If vibrational structure is expected, 10/10 may also be used.
80 meV 290.77(3) eV (C 1s→π). CO2 [1]
288.000(5) eV (C 1s→3p) CH4 [2]
287.40(2) eV (C 1s→π*, v=0) CO [3]
N 1s G5 20/20 84
83.23/84.23/84.83
396-410
356-408
0.05   120 meV 401.10 (2) eV (N 1s→π, v=1) N2 [3]
O 1s G5 20/20
30/50
95.6 525-542 0.05
0.10
  150 meV 535.4 eV (O 1s→πu) CO2 [4]
534.21(9) (O1s→π*) CO [3]
Ne G1             45.547     n=3
47.123     n=4
47.694     n=5
47.965     n=6
Ne 2s2p6(2S)np1P0 [5]
He G1 2nd ord             60 147     n=2
63.658     n=3
64.467     n=5
He 2,0n [6]
He G1 2nd ord             64.135 n=4
He 2,1n [6]
Ar 3s               26.614     n=4
27.996     n=5
28.509     n=6
Ar 3s 3p6 (2S1/2)np 1P1 [7]
F 1s G5   30.05         689.0 (1) eV SF6  F1s → a1g [9]
S 2p1/2               SF6 2p1/2 → t2g 173.44eV; 
2p1/2 → t2g 184.57 (1) [9]
S 2s               240.4  eV T1u (t1u)
SF6 [8]
 
These values cover typical near edge regions from the first resonance to above threshold. If higher lying sigma resonances are also of interest, it is necessary to change the gap and scan with larger step size at higher energy.
[1]         M. Tronc, G.C. King, F.H. Read, J. Phys. B: At. Mol. OpPhys. 12 (1979) 137.
[2]         M. de Simone, M. Coreno, M. Alagia, R. Richter, K. C. Prince J. Phys. B: Atom. Mol. Opt. Phys. 35 (2002) 61
[3]         R.N.S. Sodhi, C.E. Brion, J. Electron Spectrosc. Relat. Phenom. 34 (1984) 363.
[4]         G.R. Wight, C.E. Brion, J. Electron Spectrosc. Relat. Phenom. 3 (1974) 191.
[5]         K. Schulz et al. Phys. Rev. A 54 (1996) 3095
[6]         M. Domke et al. Phys. rev. A 53 (1996) 1424
[7]         R.P. Madden, D. L. Edered, K. Codling, Phys. rev. A 177 (1969) 136
[8]         I.G. Eustatiu et al. Chem. Phys. 257 (2000) 235
[9]         E. Hudson, D. A. Shirley, M. Domke, G. TRemmers, A. Puschmann, T. Mandell, C. Xue, G. Kaindl, Phys. rev. A 47 (1993) 361
Last Updated on Wednesday, 25 March 2020 18:16