Research Notes III, 1950

11/27/50

Be (NO₃)₂ 0.51 M + 4 M MnCl₂ H_s = 0.085 G

No. of cells	H₁	Signal Amplitude
1/2	-	21.9 ± 2.7
1	-	51.4 ± 1.3
1 1/2	-	58.0 ± 3.3
2	-	44.1 ± 1.4
2 1/2	-	25.7 ± 5.1
3	-	16.5 ± 1.8

12/1/50

Resonance frequency of O¹⁷

Sample: enriched H₂O¹⁷ without paramagnetic catalyst

O¹⁷ (5820 --> 5800 KC)

Time	Distance bet. markers	marker	Resonance distance	Resonance frequency	Δν	Δν²
16 min	39.0 mm	#1	8.5 mm	58 & 5.8 KC	.1	.01
47	39.5	"	8.8	58 & 5.7	.2	.04
79	38.0	"	7.8	58 & 6.0	.1	.01
103	38.5	"	7.8	58 & 6.0	.1	.01

D² (6600 --> 6580 KC)

4 min	30.0 mm	# 1	22.0 mm	6585.4 KC	.15	.0225
36	29.0	"	21.0	6585.6	.05	.0025
72	30.0	"	22.0	6585.4	.15	.0225
93	29.5	"	21.0	6585.8	.25	.0625

12/5/50

weight of bottle = 21.800 g " " 1 ml D₂O = 1.120 g

weight of MnSO₄·H₂O = 16.9 g

29.3 20 cc of H₂O added to form 100/3 cc solution

Saturation expt of O¹⁷ resonance with a sample of enriched H₂O¹⁷ in 0.00019 M MnSO₄ solution

No. of cells	H₁	Signal amplitude
1/2	0.022	18.5
1	0.053	33.5
1 1/2	0.089	39
2	0.134	39.5
2 1/2	0.174	34
3	0.218	23

H_s = 0.086 G G ~ 65

Assume saturation occurs at H₁ = 0.1

x	H₁	SIG AMP
0.2	0.0283 G	0.51 x 40
0.4	0.0566	0.864
0.6	0.0849	1.025
0.707	-	1.04
0.8	0.113	1.027
1.0	0.142	0.96
1.2	0.169	0.851
1.4	0.198	0.74
1.6	0.226	0.641

Saturation expt of D² resonance with sample of 3.38 N D₂O + 3 M MnSO₄

G ~ 55

No. of cells	H₁	Sig Amp
1/2	0.022 G	19
1	0.053	41.5
1 1 /2	0.089	61.5
2	0.134	74
2 1/2	0.174	81
3	0.218	90
3 1/2	0.268	89
4	0.316	88

Assume saturation occurs at H₁=0.225G

x	H₁	SIG AMP
0.1	0.0312	214
0.2	0.0624	4.55
0.3	0.936	6.34
0.4	0.125	7.70
0.6	0.187	9.15
0.8	0.250	9.17
1.0	0.312	8.57
1.2	0.374	7.60