A detailed examination of a high-resolution Fourier-transform spectrum of a platinum hollow-cathode discharge in the near infrared has yielded one Pt i and four Pt ii parity-forbidden magnetic dipole transitions. Theoretical calculations and analysis of the hyperfine structure are used to confirm these assignments, and applications to astrophysics and lasers are suggested.

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Errors in parentheses are from the least-squares fit and do not include possible systematic errors.
Intensity is relative to the actual P–Ne FTS spectrum. Strongest line in the infrared FTS spectrum was a Ne transition at 6563.9 cm^{−1} with a relative intensity of 1000.
Ref. 1. Estimated error is mainly due to centriod approximation.
Doppler width corresponds to a thermal temperature of ~5000 K.
Computed from level isotope shifts.7
Not varied in the least-squares fit.
Ref. 4.
Ref. 8.

Table 2

Calculated and Experimental Energies (cm^{−1}) and Calculated Lifetimes for the Low Even Levels of Pt i^{a}

Configuration

^{3}D_{3}

^{3}D_{2}

^{3}F_{4}

^{1}S_{0}

^{3}P_{2}

^{3}F_{3}

^{3}D_{1}

^{1}D_{2}

^{3}F_{2}

^{3}P_{0}

^{3}P_{1}

Calculated Energy

Experimental Energy

5d^{9}6s

^{3}D_{3}

E-7

E-7

—

E-6

E-2

E-2

1

2

—

4

0

0

5d^{9}6s

^{3}D_{2}

E-2

E-10

E-2

E-2

E-1

E-2

E-1

E-2

1

E-1

733

775

5d^{8}6s^{2}

^{3}F_{4}

E-9

—

—

E-2

E-2

—

E-2

1

—

—

516

823

5d^{10}

^{1}S_{0}

—

—

—

E-10

—

—

E-2

E-3

—

—

6 696

6140

5d^{8}6s^{2}

^{3}P_{2}

13

E-1

—

—

E-3

E-5

E-3

E-2

E-1

E-1

6 484

6 567

5d^{8}6s^{2}

^{3}F_{3}

E-6

4

168

—

1

—

E-4

E-4

—

E-2

10 392

10 116

5d^{9}6s

^{3}D_{1}

—

40

—

E-9

3

—

E-4

E-2

—

E-1

10 392

10 131

5d^{9}6s

^{1}D_{2}

77

10

—

—

E-1

E-1

1

E-5

E-4

E-9

13 295

13 496

5d^{8}6s^{2}

^{3}F_{2}

2

24

—

—

40

17

E-1

1

E-8

E-3

16 053

15 501

5d^{8}6s^{2}

^{3}P_{0}

—

—

—

—

—

—

E-6

—

—

—

16 898

16 983

5d^{8}6s^{2}

^{3}P_{1}

—

13

—

3

27

—

E-5

3

1

1

19 470

18 556

The calculated gA values (in reciprocal seconds) for electric quadrupole radiation are in the upper right-hand section of the table, and those for magnetic dipole are in the lower left. Values for gA less than 1 are given as powers of 10, i.e., E-3 = 10^{−3}. The experimental energies are from the literature,1 except for the ^{3}P_{0} state, which was recently located at 16983.49 cm^{−1}.

Table 3

Calculated and Experimental Energies (cm^{−1}) and Calculated Lifetimes for the Low Even Levels of Pt ii^{a}

Configuration

^{2}D_{5/2}

^{4}F_{9/2}

^{2}D_{3/2}

^{4}F_{7/2}

^{4}F_{5/2}

^{4}F_{3/2}

^{4}P_{5/2}

^{2}F_{7/2}

Calculated Energy

Experimental Energy

5d^{9}

^{2}D_{5/2}

E-4

E-3

E-1

E-1

1

1

9

0

0

5d^{8}6s

^{4}F_{9/2}

—

—

E-5

E-2

—

E-1

E-2

5 302

4 786

5d^{9}

^{2}D_{3/2}

35

—

E-8

E-4

E-3

E-2

E-2

8 488

8 419

5d^{8}6s

^{4}F_{7/2}

E-1

11

—

E-3

E-4

E-3

E-4

9 303

9 356

5d^{8}6s

^{4}F_{5/2}

E-1

—

1

5

E-6

E-7

E-5

13 456

13 329

5d^{8}6s

^{4}F_{3/2}

24

—

E-3

—

1

E-5

E-6

15 268

15 791

5d^{8}6s

^{4}P_{5/2}

1

—

3

80

2

E-1

E-8

16 924

16 820

5d^{8}6s

^{2}F_{7/2}

4

169

—

6

4

—

E-2

17 760

18 097

The calculated gA values (in reciprocal seconds) for electric quadrupole radiation are in the upper right-hand section of the table, and those for magnetic dipole are in the lower left. Values for gA less than 1 are given as powers of 10, i.e., E-3 = 10^{−3}. The experimental energies are from Shenstone.3

Observed and calculated σ are in inverse centimeters. Calculated σ’s were derived from Pt ii terms.3
Intensities relative to actual Pt–Ne FTS spectrum.
Intensity not meaningful because badly blended and seen in a Pt–Ar spectrum.

Errors in parentheses are from the least-squares fit and do not include possible systematic errors.
Intensity is relative to the actual P–Ne FTS spectrum. Strongest line in the infrared FTS spectrum was a Ne transition at 6563.9 cm^{−1} with a relative intensity of 1000.
Ref. 1. Estimated error is mainly due to centriod approximation.
Doppler width corresponds to a thermal temperature of ~5000 K.
Computed from level isotope shifts.7
Not varied in the least-squares fit.
Ref. 4.
Ref. 8.

Table 2

Calculated and Experimental Energies (cm^{−1}) and Calculated Lifetimes for the Low Even Levels of Pt i^{a}

Configuration

^{3}D_{3}

^{3}D_{2}

^{3}F_{4}

^{1}S_{0}

^{3}P_{2}

^{3}F_{3}

^{3}D_{1}

^{1}D_{2}

^{3}F_{2}

^{3}P_{0}

^{3}P_{1}

Calculated Energy

Experimental Energy

5d^{9}6s

^{3}D_{3}

E-7

E-7

—

E-6

E-2

E-2

1

2

—

4

0

0

5d^{9}6s

^{3}D_{2}

E-2

E-10

E-2

E-2

E-1

E-2

E-1

E-2

1

E-1

733

775

5d^{8}6s^{2}

^{3}F_{4}

E-9

—

—

E-2

E-2

—

E-2

1

—

—

516

823

5d^{10}

^{1}S_{0}

—

—

—

E-10

—

—

E-2

E-3

—

—

6 696

6140

5d^{8}6s^{2}

^{3}P_{2}

13

E-1

—

—

E-3

E-5

E-3

E-2

E-1

E-1

6 484

6 567

5d^{8}6s^{2}

^{3}F_{3}

E-6

4

168

—

1

—

E-4

E-4

—

E-2

10 392

10 116

5d^{9}6s

^{3}D_{1}

—

40

—

E-9

3

—

E-4

E-2

—

E-1

10 392

10 131

5d^{9}6s

^{1}D_{2}

77

10

—

—

E-1

E-1

1

E-5

E-4

E-9

13 295

13 496

5d^{8}6s^{2}

^{3}F_{2}

2

24

—

—

40

17

E-1

1

E-8

E-3

16 053

15 501

5d^{8}6s^{2}

^{3}P_{0}

—

—

—

—

—

—

E-6

—

—

—

16 898

16 983

5d^{8}6s^{2}

^{3}P_{1}

—

13

—

3

27

—

E-5

3

1

1

19 470

18 556

The calculated gA values (in reciprocal seconds) for electric quadrupole radiation are in the upper right-hand section of the table, and those for magnetic dipole are in the lower left. Values for gA less than 1 are given as powers of 10, i.e., E-3 = 10^{−3}. The experimental energies are from the literature,1 except for the ^{3}P_{0} state, which was recently located at 16983.49 cm^{−1}.

Table 3

Calculated and Experimental Energies (cm^{−1}) and Calculated Lifetimes for the Low Even Levels of Pt ii^{a}

Configuration

^{2}D_{5/2}

^{4}F_{9/2}

^{2}D_{3/2}

^{4}F_{7/2}

^{4}F_{5/2}

^{4}F_{3/2}

^{4}P_{5/2}

^{2}F_{7/2}

Calculated Energy

Experimental Energy

5d^{9}

^{2}D_{5/2}

E-4

E-3

E-1

E-1

1

1

9

0

0

5d^{8}6s

^{4}F_{9/2}

—

—

E-5

E-2

—

E-1

E-2

5 302

4 786

5d^{9}

^{2}D_{3/2}

35

—

E-8

E-4

E-3

E-2

E-2

8 488

8 419

5d^{8}6s

^{4}F_{7/2}

E-1

11

—

E-3

E-4

E-3

E-4

9 303

9 356

5d^{8}6s

^{4}F_{5/2}

E-1

—

1

5

E-6

E-7

E-5

13 456

13 329

5d^{8}6s

^{4}F_{3/2}

24

—

E-3

—

1

E-5

E-6

15 268

15 791

5d^{8}6s

^{4}P_{5/2}

1

—

3

80

2

E-1

E-8

16 924

16 820

5d^{8}6s

^{2}F_{7/2}

4

169

—

6

4

—

E-2

17 760

18 097

The calculated gA values (in reciprocal seconds) for electric quadrupole radiation are in the upper right-hand section of the table, and those for magnetic dipole are in the lower left. Values for gA less than 1 are given as powers of 10, i.e., E-3 = 10^{−3}. The experimental energies are from Shenstone.3

Observed and calculated σ are in inverse centimeters. Calculated σ’s were derived from Pt ii terms.3
Intensities relative to actual Pt–Ne FTS spectrum.
Intensity not meaningful because badly blended and seen in a Pt–Ar spectrum.