TABLE 3. Recommended gamma-ray energies and emission probabilities ordered by radionuclide

Data uncertainties are defined as standard deviations corresponding to the 1σ confidence level.

 Nuclide

Energy (keV)

Emission Probability
per decay

 Comments

 

uncertainty

uncertainty

 

11-Na-22

511

-

1.798

± 0.002

annihilation radiation



1274.537

± 0.003

0.99940

± 0.00014

11-Na-24

1368.626

± 0.005

0.999935

± 0.000005



2754.007

± 0.011

0.99872

± 0.00008

19-K-40

1460.822

± 0.006

0.1066

± 0.0013

21-Sc-46

889.271

± 0.002

0.999833

± 0.000005




1120.537

± 0.003

0.99986

+ 0.00004
- 0.00036

24-Cr-51

320.0835

± 0.0004

0.0987

± 0.0005

25-Mn-54

834.838

± 0.005

0.999746

± 0.000011

25-Mn-56

846.7638

± 0.0019

0.9885

± 0.0003

1810.726

± 0.004

0.269

± 0.004

2113.092

± 0.006

0.142

± 0.003



2523.06

± 0.05

0.0102

± 0.0002

26-Fe-59

142.651

± 0.002

0.00972

± 0.00015

192.349

± 0.005

0.0292

± 0.0003

1099.245

± 0.003

0.5659

± 0.0021

1291.590

± 0.006

0.4321

± 0.0025

 

27-Co-56

846.7638

± 0.0019

0.999399

± 0.000023

977.363

± 0.004

0.01422

± 0.00007

1037.8333

± 0.0024

0.1403

± 0.0005

1175.0878

± 0.0022

0.02249

± 0.00009

1238.2736

± 0.0022

0.6641

± 0.0016

1360.196

± 0.004

0.04280

± 0.00013

1771.327

± 0.003

0.1545

± 0.0004

2015.176

± 0.005

0.03017

± 0.00014

2034.752

± 0.005

0.07741

± 0.00013

2598.438

± 0.004

0.1696

± 0.0004

3009.559

± 0.004

0.01038

± 0.00019

3201.930

± 0.011

0.03203

± 0.00013

3253.402

± 0.005

0.0787

± 0.0003

3272.978

± 0.006

0.01855

± 0.00009



3451.119

± 0.004

0.00942

± 0.00006

27-Co-57

14.41295

± 0.00031

0.0915

± 0.0017

122.06065

± 0.00012

0.8551

± 0.0006



136.47356

± 0.00029

0.1071

± 0.0015

27-Co-58

511

-

0.300

± 0.004

annihilation radiation



810.759

± 0.002

0.9945

± 0.0001

27-Co-60

1173.228

± 0.003

0.9985

± 0.0003



1332.492

± 0.004

0.999826

± 0.000006

29-Cu-64

511

-

0.3572

± 0.0028

annihilation radiation



1345.77

± 0.16

0.00475

± 0.00010

30-Zn-65

511

-

0.0284

± 0.0004

annihilation radiation



1115.539

± 0.002

0.5060

± 0.0022

31-Ga-66

833.5324

± 0.0021

0.059

± 0.005

1039.220

± 0.003

0.37

± 0.03

1333.112

± 0.005

0.0117

± 0.0009

1418.754

± 0.005

0.0061

± 0.0005

1508.158

± 0.007

0.0055

± 0.0004

1898.823

± 0.008

0.0039

± 0.0003

1918.329

± 0.005

0.0199

± 0.0016

2189.616

± 0.006

0.053

± 0.004

2422.525

± 0.007

0.0188

± 0.0015

2751.835

± 0.005

0.227

± 0.018

3228.800

± 0.006

0.0151

± 0.0012

3380.850

± 0.006

0.0146

± 0.0012

3422.040

± 0.008

0.0086

± 0.0007

3791.004

± 0.008

0.0109

± 0.0009

4085.853

± 0.009

0.0127

± 0.0010

4295.187

± 0.010

0.038

± 0.003

4461.202

± 0.009

0.0084

± 0.0007



4806.007

± 0.009

0.0186

± 0.0015

31-Ga-67

91.265

± 0.005

0.0307

± 0.0011

93.310

± 0.005

0.378

± 0.009

184.576

± 0.010

0.209

± 0.007

208.950

± 0.010

0.0237

± 0.0008

300.217

± 0.010

0.168

± 0.006

393.527

± 0.010

0.0466

± 0.0016

 

31-Ga-68

511

-

1.7828

± 0.0022

annihilation radiation



1077.34

± 0.05

0.0322

± 0.0003

34-Se-75

66.0518

± 0.0008

0.01112

± 0.00012

96.7340

± 0.0009

0.0342

± 0.0003

121.1155

± 0.0011

0.172

± 0.003

136.0001

± 0.0006

0.582

± 0.007

198.6060

± 0.0012

0.0148

± 0.0004

264.6576

± 0.0009

0.589

± 0.003

279.5422

± 0.0010

0.2499

± 0.0013

303.9236

± 0.0010

0.01316

± 0.00008



400.6572

± 0.0008

0.1147

± 0.0009

36-Kr-85

513.997

± 0.005

0.00435

± 0.00010

38-Sr-85

514.0048

± 0.0022

0.985

± 0.004

39-Y-88

898.036

± 0.004

0.9390

± 0.0023



1836.052

± 0.013

0.9938

± 0.0003

41-Nb-93m

30.77

± 0.02

(5.59-9

± 0.16) 10-6

41-Nb-94

702.639

± 0.004

0.99815

± 0.00006



871.114

± 0.003

0.99892

± 0.00003

41-Nb-95

765.803

± 0.006

0.99808

± 0.00007

42-Mo-99/43-Tc-99m

40.58323

± 0.00017

0.01022

± 0.00027

140.511

± 0.001

0.896

± 0.017

181.094

± 0.002

0.0601

± 0.0011

366.421

± 0.015

0.01194

± 0.00023

739.500

± 0.017

0.1212

± 0.0015



777.921

± 0.020

0.0428

± 0.0008

43-Tc-99m

140.511

± 0.001

0.885

± 0.002



142.683

± 0.001

0.00023

± 0.00002

44-Ru-103

39.760

± 0.010

0.00071

± 0.00003

53.275

± 0.010

0.00384

± 0.00006

294.98

± 0.02

0.00289

± 0.00006

443.80

± 0.02

0.00344

± 0.00003

497.08

± 0.02

0.9131

± 0.0007

557.04

± 0.02

0.00855

± 0.00005



610.33

± 0.02

0.0578

± 0.0003

44-Ru-106/45-Rh 106

511.8534

± 0.0023

0.2050

± 0.0021

616.22

± 0.09

0.00724

± 0.00013

621.93

± 0.06

0.0986

± 0.0011

873.49

± 0.05

0.00435

± 0.00008

1050.41

± 0.06

0.01488

± 0.00022



1128.07

± 0.05

0.00399

± 0.00006

47-Ag-110m

446.812

± 0.003

0.0365

± 0.0005

with 110Ag

620.3553

± 0.0017

0.0272

± 0.0008

with 110Ag

657.7600

± 0.0011

0.9438

± 0.0008

with 110Ag

677.6217

± 0.0012

0.1056

± 0.0006

with 110Ag

687.0091

± 0.0018

0.0645

± 0.0003

with 110Ag

706.6760

± 0.0015

0.1648

± 0.0008

with 110Ag

744.2755

± 0.0018

0.0471

± 0.0003

with 110Ag

763.9424

± 0.0017

0.2231

± 0.0009

with 110Ag

818.0244

± 0.0018

0.0733

± 0.0004

with 110Ag

884.6781

± 0.0013

0.740

± 0.012

with 110Ag

937.483

± 0.003

0.3451

± 0.0027

with 110Ag

1384.2931

± 0.0020

0.247

± 0.005

with 110Ag

1475.7792

± 0.0023

0.0403

± 0.0005

with 110Ag

1505.0280

± 0.0020

0.1316

± 0.0016

with 110Ag



1562.294

± 0.018

0.0121

± 0.0003

with 110Ag

48-Cd-109

88.0336

± 0.0011

0.03626

± 0.00020

49-In-111

171.28

± 0.03

0.9066

± 0.0025



245.35

± 0.04

0.9409

± 0.0006

50-Sn-113

255.134

± 0.010

0.0211

± 0.0008



391.698

± 0.003

0.6494

± 0.0017

51-Sb-125

176.314

± 0.002

0.0682

± 0.0007

380.452

± 0.008

0.01520

± 0.00015

427.874

± 0.004

0.2955

± 0.0024

463.365

± 0.004

0.1048

± 0.0009

600.597

± 0.002

0.1776

± 0.0018

606.713

± 0.003

0.0502

± 0.0005

635.950

± 0.003

0.1132

± 0.0010



671.441

± 0.006

0.01783

± 0.00016

52-Te-123m

158.97

± 0.05

0.8399

± 0.0008

53-I-123

158.97

± 0.05

0.8325

± 0.0021



528.96

± 0.05

0.0132

± 0.0008

53-I-125

35.4919

± 0.0005

0.0667

± 0.0017

53-I-129

39.578

± 0.004

0.0742

± 0.0008

53-I-131

80.1850

± 0.0019

0.02607

± 0.00027

284.305

± 0.005

0.0606

± 0.0006

364.489

± 0.005

0.812

± 0.008

636.989

± 0.004

0.0726

± 0.0008



722.911

± 0.005

0.01796

± 0.00020

55-Cs-134

563.243

± 0.003

0.0837

± 0.0003

569.327

± 0.003

0.1538

± 0.0004

604.720

± 0.003

0.97650

± 0.00018

795.83

± 0.03

0.855

± 0.003

801.945

± 0.004

0.0870

± 0.0003



1365.186

± 0.004

0.03017

± 0.00012

55-Cs-137

661.657

± 0.003

0.8499

± 0.0020

56-Ba-133

53.1622

± 0.0006

0.0214

± 0.0003

79.6142

± 0.0012

0.0265

± 0.0005

80.9979

± 0.0011

0.329

± 0.003

276.3989

± 0.0012

0.0716

± 0.0005

302.8508

± 0.0005

0.1834

± 0.0013

356.0129

± 0.0007

0.6205

± 0.0019



383.8485

± 0.0012

0.0894

± 0.0006

58-Ce-139

165.8575

± 0.0011

0.7990

± 0.0004

58-Ce-141

145.4433

± 0.0014

0.4829

± 0.0020

58-Ce-144/59-Pr-144

33.568

± 0.010

0.00235

± 0.00012

144Ce

40.98

± 0.10

0.0041

± 0.0025

144Ce

80.12

± 0.05

0.0152

± 0.0010

144Ce

133.515

± 0.004

0.1109

± 0.0016

144Ce

696.505

± 0.004

0.01342

± 0.00014

144Pr - per 144Ce decay

1489.148

± 0.003

0.00296

± 0.00005

144Pr - per 144Ce decay



2185.645

± 0.005

0.00680

± 0.00018

144Pr - per 144Ce decay

62-Sm-153

69.67301

± 0.00018

0.0473

± 0.0003

83.36716

± 0.00017

0.00192

± 0.00007

89.48593

± 0.00021

0.00158

± 0.00015

97.43095

± 0.00017

0.00772

± 0.00018

103.18007

± 0.00013

0.293

± 0.003



172.85295

± 0.00021

0.000737

± 0.000020

63-Eu-152

121.7817

± 0.0003

0.2841

± 0.0013

ε : gamma emissions arise from electron-capture decay mode

244.6974

± 0.0008

0.0755

± 0.0004

ε :  gamma emissions arise from electron-capture decay mode

344.2785

± 0.0012

0.2658

± 0.0012

β- : gamma emissions arise from β decay mode

411.1165

± 0.0012

0.02237

± 0.00010

β- : gamma emissions arise from β decay mode

443.965

± 0.003

0.03125

± 0.00014

ε : gamma emissions arise from electron-capture decay mode

778.9045

± 0.0024

0.1296

± 0.0006

β- : gamma emissions arise from β decay mode

867.380

± 0.003

0.04241

± 0.00023

ε : gamma emissions arise from electron-capture decay mode

964.072

± 0.018

0.1462

± 0.0006

ε : gamma emissions arise from electron-capture decay mode

1085.837

± 0.010

0.1013

± 0.0006

ε : gamma emissions arise from electron-capture decay mode

1089.737

± 0.005

0.01731

± 0.00010

β- : gamma emissions arise from β decay mode

1112.076

± 0.003

0.1340

± 0.0006

ε : gamma emissions arise from electron-capture decay mode

1212.948

± 0.011

0.01415

± 0.00009

ε : gamma emissions arise from electron-capture decay mode

1299.142

± 0.008

0.01632

± 0.00009

β- : gamma emissions arise from β decay mode



1408.013

± 0.003

0.2085

± 0.0009

ε : gamma emissions arise from electron-capture decay mode

63-Eu-154

123.0706

± 0.0009

0.404

± 0.005

247.9288

± 0.0007

0.0689

± 0.0007

591.755

± 0.003

0.0495

± 0.0005

692.4205

± 0.0018

0.0179

± 0.0003

723.3014

± 0.0022

0.2005

± 0.0021

756.8020

± 0.0023

0.0453

± 0.0005

873.1834

± 0.0023

0.1217

± 0.0012

996.262

± 0.006

0.1050

± 0.0010

1004.725

± 0.007

0.1785

± 0.0017

1246.121

± 0.004

0.00862

± 0.00008

1274.429

± 0.004

0.349

± 0.003



1596.4804

± 0.0028

0.01783

± 0.00017

63-Eu-155

26.531

± 0.021

0.00316

± 0.00022

45.2990

± 0.0010

0.0131

± 0.0005

60.0086

± 0.0010

0.0122

± 0.0005

86.0591

± 0.0010

0.00154

± 0.00017

86.5479

± 0.0010

0.307

± 0.003



105.3083

± 0.0010

0.211

± 0.006

67-Ho-166

80.576

± 0.002

0.0655

± 0.0008

1379.437

± 0.006

0.00933

± 0.00016

1581.833

± 0.007

0.00186

± 0.00004



1662.439

± 0.006

0.00118

± 0.00005

67-Ho-166m

80.5725

± 0.0013

0.1266

± 0.0023

184.4107

± 0.0011

0.725

± 0.005

215.871

± 0.007

0.0266

± 0.0017

259.736

± 0.010

0.01078

± 0.00010

280.4630

± 0.0023

0.2954

± 0.0025

300.741

± 0.003

0.0373

± 0.0004

365.768

± 0.006

0.0246

± 0.0004

410.956

± 0.003

0.1135

± 0.0018

451.540

± 0.004

0.02915

± 0.00014

464.798

± 0.006

0.0125

± 0.0004

529.825

± 0.004

0.094

± 0.004

570.995

± 0.005

0.0543

± 0.0020

611.579

± 0.006

0.0131

± 0.0021

670.526

± 0.004

0.0534

± 0.0021

691.253

± 0.007

0.0132

± 0.0007

711.697

± 0.003

0.549

± 0.012

752.280

± 0.004

0.122

± 0.003

810.286

± 0.004

0.573

± 0.011

830.565

± 0.004

0.0972

± 0.0018



950.988

± 0.004

0.02744

± 0.00019

69-Tm-170

78.59

± 0.02

0.000034

± 0.000003



84.25474

± 0.00008

0.0248

± 0.0009

70-Yb-169

63.12044

± 0.00004

0.4405

± 0.0024

93.61447

± 0.00008

0.02571

± 0.00017

109.77924

± 0.00004

0.1736

± 0.0009

118.18940

± 0.00014

0.01870

± 0.00010

130.52293

± 0.00006

0.1138

± 0.0005

177.21307

± 0.00006

0.2232

± 0.0010

197.95675

± 0.00007

0.3593

± 0.0012

261.07712

± 0.00009

0.01687

± 0.00008



307.73586

± 0.00010

0.10046

± 0.00045

77-Ir-192

205.79430

± 0.00009

0.0334

± 0.0004

295.95650

± 0.00015

0.2872

± 0.0014

308.45507

± 0.00017

0.2968

± 0.0015

316.50618

± 0.00017

0.8275

± 0.0021

468.06885

± 0.00026

0.4781

± 0.0024

484.5751

± 0.0004

0.03189

± 0.00024

588.5810

± 0.0007

0.04517

± 0.00022

604.41105

± 0.00025

0.0820

± 0.0004



612.46215

± 0.00026

0.0534

± 0.0008

79-Au-198

411.80205

± 0.00017

0.9554

± 0.0007

675.8836

± 0.0007

0.00806

± 0.00007



1087.6842

± 0.0007

0.00159

± 0.00003

80-Hg-203

279.1952

± 0.0010

0.8148

± 0.0008

81-Tl-201

135.312

± 0.034

0.02604

± 0.00022



167.450

± 0.030

0.1000

± 0.0010

81-Tl-208

277.37

± 0.03

0.0237

± 0.0011

per 228Th decay - 228Th decay chain

583.187

± 0.002

0.3055

± 0.0017

per 228Th decay - 228Th decay chain

860.56

± 0.03

0.0448

± 0.0004

per 228Th decay - 228Th decay chain



2614.511

± 0.010

0.3585

± 0.0007

per 228Th decay - 228Th decay chain

82-Pb-212

115.183

± 0.005

0.00623

± 0.00022

228Th decay chain

238.632

± 0.002

0.436

± 0.003

228Th decay chain



300.09

± 0.01

0.0318

± 0.0013

228Th decay chain

82-Pb-214

53.2275

± 0.0021

0.01066

± 0.00014

226Ra decay chain

241.997

± 0.003

0.0719

± 0.0006

226Ra decay chain

295.224

± 0.002

0.1828

± 0.0014

226Ra decay chain



351.932

± 0.002

0.3534

± 0.0027

226Ra decay chain

83-Bi-207

569.698

± 0.002

0.9776

± 0.0003

1063.656

± 0.003

0.7458

± 0.0049



1770.228

± 0.009

0.0687

± 0.0003

83-Bi-212

727.33

± 0.01

0.0674

± 0.0012

228Th decay chain

785.37

± 0.09

0.0111

± 0.0001

228Th decay chain



1620.74

± 0.01

0.0151

± 0.0003

228Th decay chain

83-Bi-214

609.316

± 0.003

0.4516

± 0.0033

226Ra decay chain

665.453

± 0.022

0.01521

± 0.00011

226Ra decay chain

768.367

± 0.011

0.04850

± 0.00038

226Ra decay chain

806.185

± 0.011

0.01255

± 0.00011

226Ra decay chain

934.061

± 0.012

0.03074

± 0.00025

226Ra decay chain

1120.287

± 0.010

0.1478

± 0.0011

226Ra decay chain

1155.19

± 0.02

0.01624

± 0.00014

226Ra decay chain

1238.110

± 0.012

0.05785

± 0.00045

226Ra decay chain

1280.96

± 0.02

0.01425

± 0.00012

226Ra decay chain

1377.669

± 0.012

0.03954

± 0.00033

226Ra decay chain

1401.516

± 0.014

0.01324

± 0.00011

226Ra decay chain

1407.993

± 0.007

0.02369

± 0.00019

226Ra decay chain

1509.217

± 0.008

0.02108

± 0.00021

226Ra decay chain

1661.316

± 0.013

0.01037

± 0.00010

226Ra decay chain

1729.640

± 0.012

0.02817

± 0.00023

226Ra decay chain

1764.539

± 0.015

0.1517

± 0.0012

226Ra decay chain

1847.420

± 0.025

0.02000

± 0.00018

226Ra decay chain

2118.536

± 0.008

0.01148

± 0.00011

226Ra decay chain

2204.071

± 0.021

0.0489

± 0.0010

226Ra decay chain



2447.673

± 0.010

0.01536

± 0.00015

226Ra decay chain

86-Rn-220

549.76

± 0.04

0.00115

± 0.00015

228Th decay chain

88-Ra-224

240.986

± 0.006

0.0412

± 0.0004

228Th decay chain

88-Ra-226

186.211

± 0.013

0.03533

± 0.00028

226Ra decay chain

90-Th-228

84.373

± 0.003

0.0117

± 0.0005

228Th decay chain

131.612

± 0.004

0.00124

± 0.00006

228Th decay chain



215.985

± 0.004

0.00226

± 0.00020

228Th decay chain

91-Pa-234m

258.24

± 0.07

0.000726

± 0.000009

daughter of 234Th (238U)

742.814

± 0.022

0.00096

± 0.00003

daughter of 234Th (238U)

766.358

± 0.020

0.00318

± 0.00005

daughter of 234Th (238U)

786.272

± 0.022

0.00054

± 0.00001

daughter of 234Th (238U)



1001.025

± 0.022

0.00832

± 0.00010

daughter of 234Th (238U)

95-Am-241

26.3446

± 0.0002

0.0240

± 0.0003

33.1963

± 0.0003

0.00121

± 0.00003

59.5409

± 0.0001

0.3578

± 0.0009

95-Am-243

43.53

± 0.02

0.0589

± 0.0010

74.66

± 0.02

0.672

± 0.012